CN115819167B - High tension bond energy release material with composite structure and preparation method thereof - Google Patents

Abstract

The invention provides a high-tension bond energy release material with a composite structure, which comprises p-CO and a conventional energetic material; wherein the p-CO is coated on a conventional energetic material to form a coating layer, and the conventional energetic material is selected from one or more of HMX, RDX, TNT, LLM-105 and FOX-7. The present invention also provides a method of preparing the high tensile bond energy releasing material having the composite structure of the present invention, comprising the steps of: s1, placing the conventional energetic material into a high-pressure cavity of a high-pressure device; s2, loading carbon monoxide gas into the high-pressure cavity in a low-temperature liquefaction mode; sealing the high-pressure cavity; and S3, pressurizing a mixture of a conventional energetic material and carbon monoxide in the high-pressure cavity to prepare the high-tension bond energy release material with the composite structure. The high-tension bond energy release material with the composite structure has high energy density, good stability and safe detonation process.

Description

High tension bond energy release material with composite structure and preparation method thereof

Technical field

The invention belongs to the field of energetic materials. Specifically, the present invention relates to high-tension bond energy-releasing materials with composite structures and preparation methods thereof.

Background technique

With the progress of society and the development of science and technology, various application scenarios of weapons have put forward higher requirements for the safety, environmental protection and energy density of energetic materials. At present, conventional energetic materials of carbon, hydrogen, nitrogen and oxygen based on chemical energy mainly include Octogen (HMX), RDX, LLM-105, FOX-7 and TNT (TNT). The energy density of these conventional energetic materials has reached its limit, and it is urgent to find energetic materials with higher energy density. In addition, compared with traditional detonation methods, explosive-free detonation methods have received more and more attention. Explosive-free detonation is a highly safe detonation method that uses various excitation devices to output detonation energy without using initiating explosives. From a safety perspective, laser ignition is one of the preferred methods of detonation without explosives, and is also an important development direction for safe ignition of weapons in the future. Traditional carbon, hydrogen, nitrogen, and oxygen-containing energetic materials based on chemical energy are mostly transparent or light-colored in appearance, and have small absorption coefficients for lasers in the visible and near-infrared bands, making it difficult to achieve safe laser detonation. Scientific researchers combine some non-energetic materials, such as carbon particles, metal nanoparticles and chemical dyes, with the above-mentioned energetic materials to increase the absorption rate of laser to achieve laser ignition, but this method reduces the energy consumption to a certain extent. It reduces the energy density of insensitive explosives and is not conducive to the application of energetic materials in high-damage scenarios.

High-tension bond energy-releasing materials refer to solid polymers formed by gaseous molecular compounds under the action of condensed matter physics. Theoretically predicts that the energy of high-tension bond energy-releasing materials can reach up to 100 times the TNT equivalent. p-CO (polymerized carbon monoxide) is a high tension bond energy releasing material. Theoretically predicts that the energy of p-CO is 2-4 times higher than that of conventional explosives. p-CO is brown or black in color and can be detonated with a low-power laser. However, the stability of p-CO in the environment needs to be improved, and large-scale production is difficult to achieve.

Shanhu sun et al. disclosed in Pressure-Induced In Situ Construction of P-CO/HNIW Explosive Composites with Excellent Laser Initiation and DetonationPerformance, ACS Applied Materials & Interfaces that CO can be encapsulated in a high-pressure cavity through high-pressure inflation, and then through high-pressure inflation The method is to cover HNIW. The composite materials prepared by this method will lead to the nanometerization of the coated conventional energetic materials due to the action of high-pressure gas (mentioned in the above-mentioned literature). There are obvious grain boundary effects in this composite material, which is not conducive to improving the composite materials. energy density. In the face of practical applications, this material preparation method will also be subject to many limitations. On the one hand, CO gas itself is a flammable and explosive gas. During the dynamic high-pressure charging process, as the sample preparation volume increases, the risk factor will increase sharply. Encapsulating CO gas into a high-pressure cavity through high-pressure compression is costly and has a low safety factor. Secondly, the relative proportion of P-CO and HNIW will directly affect the stability and energy properties of the prepared composite materials. For composites prepared by high-pressure aeration, the relative amounts of p-CO and HNIW are difficult to control. More importantly, p-CO/HNIW prepared by loading CO gas under high pressure is only suitable for the laboratory principle preparation stage, and it is difficult to achieve large-scale production of products. This is a key technology that needs to be broken through for the application of high-tension bond energy release materials.

At present, there is an urgent need for energetic materials with high energy density, good stability, safe detonation process and capable of engineering production. p-CO is currently the only high-tension bond energy-releasing material that can be recycled under normal pressure. Compounding it with conventional energetic materials to form a bulk sample is not only beneficial to improving the energy density and stability of the material, but most importantly Once mass production is achieved, it is expected to be applied to current weapons and equipment, subverting the form of modern warfare.

Contents of the invention

The purpose of the present invention is to provide a high-tension bond energy release material with a composite structure that has high energy density, good stability and a safe detonation process. Another object of the present invention is to provide a method for preparing a high-tension bond energy release material with a composite structure that is low in cost, controllable in p-CO coating amount, and easy to achieve engineering expectations.

The above objects of the present invention are achieved through the following technical solutions.

On the one hand, the present invention provides a high-tension bond energy-releasing material with a composite structure, which includes p-CO and conventional energetic materials; wherein, the p-CO is coated on conventional energetic materials to form a coating layer , and the conventional energetic material is selected from one or more of HMX, RDX, LLM-105, TNT and FOX-7.

Preferably, in the high tension bond energy release material with a composite structure of the present invention, the weight of the p-CO is 12-92 relative to the total weight of the high tension bond energy release material with a composite structure. %, preferably 45-65%.

Preferably, in the high tension bond energy release material with a composite structure of the present invention, the density of the high tension bond energy release material with a composite structure is 2-6g/cm ³ .

On the other hand, the present invention provides a method for preparing the high-tension bond energy release material with a composite structure of the present invention, which includes the following steps:

S1. Place the conventional energetic material into the high-pressure cavity of the high-pressure device;

S2. Then, load carbon monoxide gas into the high-pressure cavity through low-temperature liquefaction; then, seal the high-pressure cavity;

S3. Pressurize the mixture of conventional energetic materials and carbon monoxide in the high-pressure cavity to produce the high-tension bond energy-releasing material with a composite structure.

Preferably, the method of the present invention also includes the preparation step S0 of the high-pressure device before step S1; the preparation step of the high-pressure device is carried out by a method including the following steps:

S01. Select the matching gasket according to the anvil area of the high-pressure device and pre-press it so that an indentation appears in the center of the gasket;

S02. Then, make a hole in the center of the indentation of the sealing pad. This hole is the high-pressure cavity for sample packaging and reaction;

S03. Then, fix the gasket at the indentation position on the lower anvil surface of the high-pressure device;

S04. Close the upper anvil, sealing pad and lower anvil tightly, and then open a certain distance for encapsulation of conventional energetic materials and carbon monoxide mixtures.

Preferably, in the method of the present invention, the sealing gasket is made of a material selected from T301 stainless steel, metal rhenium or metal tungsten.

Preferably, in the method of the present invention, drilling is performed by laser drilling or mechanical drilling.

Preferably, in the method of the present invention, the distance is 0.3 to 0.5 mm.

Preferably, in the method of the present invention, in step S1, after the conventional energetic material is placed into the high-pressure cavity of the high-pressure device, the volume of the conventional energetic material accounts for 10-10% of the volume of the high-pressure cavity. 90%, preferably 40-60%.

Preferably, in the method of the present invention, the low-temperature liquefaction in step S2 is performed by a method including the following steps:

S21. Assemble the high-pressure device into the cavity of the thermostat and seal the thermostat;

S22. Pour carbon monoxide gas into the thermostat;

S23. Then, close the carbon monoxide outlet valve of the thermostat, and cool the thermostat together with the incoming carbon monoxide gas to a temperature range between the melting point and boiling point of carbon monoxide, so that the carbon monoxide gas gradually liquefies and fills the high-pressure chamber of the high-pressure device body and thermostat;

S24. Then, apply pressure to the high-pressure device through the external operating rod of the thermostat to achieve sealing of carbon monoxide in the high-pressure chamber, then close the carbon monoxide inlet valve of the thermostat and open the outlet valve;

S25. Then, increase the temperature of the thermostat or turn off the high-pressure pump to gradually vaporize the remaining liquefied carbon monoxide in the thermostat and discharge it from the thermostat, and then take out the high-pressure device.

Preferably, in the method of the present invention, the pressure range required for carbon monoxide gas sealing in step S24 is 0.2-1GPa.

Preferably, in the method of the present invention, the pressurization in step S3 is performed under the following conditions: the pressurization rate is 0.5-2GPa/min, and the target pressure after pressurization is 5-100GPa.

Preferably, in the method of the present invention, the high-pressure device is selected from a multi-side pressing press, a two-side pressing press or an annular press.

Preferably, in the method of the present invention, the multi-sided pressing machine is a six-sided pressing machine.

Preferably, in the method of the present invention, the double-sided pressing machine is a Paris-Edinburgh press or a diamond anvil device.

The invention has the following beneficial effects:

(1) In the high-tension bond energy-releasing material with a composite structure prepared by the method of the present invention, the weight of p-CO and conventional energetic materials is adjustable, thereby making the high-tension bond energy-releasing material with a composite structure The density is adjustable and suitable for preparing new materials with high energy density.

(2) In the high-tension bond energy-releasing materials with composite structures prepared by the method of the present invention, CO is used to coat conventional energetic materials through low-temperature liquefaction, reducing the grain boundary effect on the density of energetic materials. It also improves the stability of the material, which is conducive to meeting the needs of multiple application scenarios of high-energy-density energetic materials.

(3) The high-tension bond energy-releasing material with a composite structure of the present invention can be detonated using low-power laser, providing the possibility for safe application and safe detonation of conventional energy-containing materials in multiple scenarios. A high-tension bond energy-releasing material with a composite structure prepared by coating conventional energetic materials with p-CO. The p-CO in the coating layer is black, brown, or red, which improves the absorption rate of laser light in the visible or near-infrared region. , can achieve 0.5W low-power laser detonation, and has application prospects in many fields.

(4) The method of the present invention has low cost, simple operation process, and is easy to realize batch preparation of composite structural energetic materials.

Description of the drawings

Below, the embodiments of the present invention are described in detail with reference to the accompanying drawings, wherein:

Figure 1 shows the normal pressure Raman spectrum of RDX;

Figure 2 is the high-pressure Raman spectrum of p-CO-coated RDX (ie, 35%-p-CO/RDX) prepared in Example 1;

Figure 3 is an optical microscope photo of p-CO before and after coating RDX;

Figure 4 shows the process of laser detonation of the high-tension bond energy release material 35%-p-CO/RDX with a composite structure;

Figure 5 is the high-pressure Raman spectrum of p-CO-coated RDX (ie, 65%-p-CO/RDX) prepared in Example 2;

Figure 6 shows the process of laser detonation of the high-tension bond energy release material 65%-p-CO/RDX with a composite structure;

Figure 7 shows the normal pressure Raman spectrum of HMX;

Figure 8 is the high-pressure Raman spectrum of p-CO-coated HMX (ie, 50%-p-CO/HMX) prepared in Example 4;

Figure 9 shows the process of laser detonation of the high-tension bond energy release material 50%-p-CO/HMX with a composite structure.

Detailed ways

The present invention will be described in further detail below in conjunction with specific embodiments. The examples given are only for illustrating the present invention and are not intended to limit the scope of the present invention.

Example 1

Preparation of high-tension bond energy-releasing material 35%-p-CO/RDX with composite structure.

(1) Preliminary preparation of the diamond anvil device, which includes the following steps:

Use a diamond anvil to pre-press the gasket made of T301 stainless steel so that an indentation appears in its center. Then, laser drilling is used to drill holes at the center of the gasket indentation. The punched hole is a high-pressure chamber for sample packaging and reaction. Then, fix the sealing pad at the indentation position on the lower anvil surface of the diamond anvil device. After that, the upper anvil, sealing pad and lower anvil are tightly closed, and then opened to a certain distance so that the distance between the upper and lower anvil surfaces is 0.5mm for encapsulation of conventional energetic materials RDX and carbon monoxide mixtures.

(2) After cutting the RDX sample, place it into the high-pressure chamber of the prepared diamond anvil device. The volume of the conventional energetic material RDX sample is 70% of the high-pressure chamber volume.

(3) Load carbon monoxide gas into the high-pressure cavity through low-temperature liquefaction, and then seal the high-pressure cavity by adjusting the relative position of the anvil of the high-pressure device; wherein the low-temperature liquefaction is performed by a method including the following steps:

Assemble the diamond anvil assembly into the cryostat cavity and seal the cryostat. Connect the assembled cryostat to the gas line and open the cryostat's outlet valve. Then, use the pressure reducing valve of the carbon monoxide cylinder and the air valve of the cryostat to control the flow rate of gaseous carbon monoxide so that it slowly enters the cryostat cavity and ventilates it for about 5 minutes to discharge the air in the cryostat cavity. Then close the carbon monoxide outlet valve of the cryostat.

Afterwards, the cryostat is placed in a liquid nitrogen environment to cool the cryostat device. The temperature and pressure status of the incoming gas are monitored in real time through the temperature and pressure sensors in the cryostat. When the temperature inside the cryostat drops below the boiling point of carbon monoxide gas, the gaseous carbon monoxide begins to gradually liquefy. Because the liquefaction of gas will release a large amount of heat, resulting in large changes in the local environment, the air pressure will fluctuate violently. After cooling down for 40 minutes, the temperature sensor showed that the boiling point of liquid nitrogen in the thermostat was around 77K, and at this time the gaseous carbon monoxide was liquefied in large quantities. Continue waiting for 30 minutes, and the liquid carbon monoxide will fill the entire cryostat.

A pressure of 0.5 GPa is applied through the external operating rod of the cryostat to lock the diamond anvil device to realize the encapsulation of carbon monoxide liquid in the high-pressure chamber. After that, close the air inlet valve of the cryostat, close the main valve of the gas cylinder, and slowly remove the cooling device under the cryostat to gradually heat up the cryostat. Open the cryostat's outlet valve and slowly discharge the carbon monoxide. Since the temperature of the cryostat is close to the boiling point of carbon monoxide, the rapid vaporization of liquid carbon monoxide will produce a large amount of gas, and the exhaust gas needs to be slowly discharged by controlling the outlet valve. When the pressure in the cryostat returns to normal pressure and the temperature reaches room temperature, the diamond anvil device can be taken out.

(4) Then, pressurize the mixture of RDX and carbon monoxide in the high-pressure chamber, where the pressurization rate is 2GPa/min and the target pressure is 10GPa. After the pressure reaches the target pressure, keep it for 1 hour, then slowly unload the pressure, open the high-pressure chamber, and obtain the desired high-tension bond energy release material p-CO/RDX with a composite structure. The prepared p-CO/RDX sample has a black appearance and a density of approximately 2.4g/cm ³ . The weight of p-CO is 35% relative to the total weight of the high-tension bond energy-releasing material with composite structure.

Figure 1 shows the normal pressure Raman spectrum of RDX.

Figure 2 shows the high-pressure Raman spectrum of p-CO-coated RDX. Figure 2 shows that as the pressure increases to 4.9GPa, the Raman scattering peak of RDX tends to disappear, and the Raman peak of CO also gradually becomes smaller. When the pressure increases to 5.4 GPa, the Raman scattering peaks of RDX and CO disappear completely, and the Raman scattering peak of p-CO appears, indicating that CO has been completely polymerized.

Figure 3 is an optical microscope photo of p-CO before and after coating RDX. From the photos taken at pressures of 2.4GPa and 5.4GPa, we can intuitively see that there are obvious boundaries in the blocks formed by RDX and CO at low pressures. As the pressure increases to 5.4 GPa, the boundaries of the blocks formed by CO and RDX become blurred. Combined with the Raman experiment, the Raman scattering peak of RDX can no longer be observed in the Raman spectrum of 5.4GPa, which shows that the sample layout in the diamond anvil is: p-CO coating RDX. Compared with the nanoscale composite material (p-CO/HNIW) disclosed in the literature (Pressure-Induced In Situ Construction of P-CO/HNIW Explosive Composites with ExcellentLaser Initiation and Detonation Performance, ACS Applied Materials&Interfaces), the CO of the present invention is made by The low-temperature liquefaction method enables coating of conventional energetic materials, and the grain boundary effect of the produced material (p-CO/RDX) is significantly reduced, which is beneficial to improving the energy density of composite materials. It should be noted that polycrystalline materials will have grain boundary effects. This document clearly records that P-CO/HNIW is composed of many nanometer-scale modules. The P-CO/HNIW material formed by stacking nanoparticles must have obvious grain boundary effects. This is also a direct result of the high-pressure inflation preparation method. It has a negative impact on the improvement of material energy density. Different from this, the grain boundary effect in the p-CO/RDX material prepared by the low-temperature liquefaction method of the present invention is significantly reduced.

Figure 4 shows the process of laser detonation of p-CO/RDX, a high-tension bond energy-releasing material with a composite structure. Photographed by high-speed CCD, the p-CO/RDX material can be detonated by a 0.5W, 635nm wavelength red laser. The entire explosion energy release process reaches the maximum value within 18ms, proving that the P-CO-coated RDX assembly structural material is a high-tension bond energy release material. This material has good stability compared to pure p-CO and can be stored stably in the air.

Example 2

Preparation of high-tension bond energy-releasing material 65%-p-CO/RDX with composite structure.

(1) Preliminary preparation of the diamond anvil device, which includes the following steps:

Use a diamond anvil to pre-press the gasket made of T301 stainless steel so that an indentation appears in its center. Then, laser drilling is used to drill holes at the center of the gasket indentation. The punched hole is a high-pressure chamber for sample packaging and reaction. Then, fix the sealing pad at the indentation position on the lower anvil surface of the diamond anvil device. After that, the upper anvil, sealing pad and lower anvil are tightly closed, and then opened to a certain distance so that the distance between the upper and lower anvil surfaces is 0.4mm for encapsulation of conventional energetic materials RDX and carbon monoxide mixtures.

(2) After cutting the RDX sample, place it into the high-pressure chamber of the prepared diamond anvil device. The volume of the conventional energetic material RDX sample is 40% of the high-pressure chamber volume.

(3) Load carbon monoxide gas into the high-pressure cavity through low-temperature liquefaction, and then seal the high-pressure cavity by adjusting the relative position of the anvil of the high-pressure device; wherein the low-temperature liquefaction is performed by a method including the following steps:

Assemble the diamond anvil assembly into the cryostat cavity and seal the cryostat. Connect the assembled cryostat to the gas line and open the cryostat's outlet valve. Then, use the pressure reducing valve of the carbon monoxide cylinder and the air valve of the cryostat to control the flow rate of gaseous carbon monoxide so that it slowly enters the cryostat cavity and ventilates it for about 5 minutes to discharge the air in the cryostat cavity. Then close the carbon monoxide outlet valve of the cryostat.

Afterwards, the cryostat is placed in a liquid nitrogen environment to cool the cryostat device. The temperature and pressure status of the incoming gas are monitored in real time through the temperature and pressure sensors in the cryostat. When the temperature inside the cryostat drops below the boiling point of carbon monoxide gas, the gaseous carbon monoxide begins to gradually liquefy. Because the liquefaction of gas will release a large amount of heat, resulting in large changes in the local environment, the air pressure will fluctuate violently. After cooling down for 60 minutes, the temperature sensor shows that the boiling point of liquid nitrogen in the thermostat is around 77K, and at this time the gaseous carbon monoxide is liquefied in large quantities. Continue waiting for 40 minutes, and the liquid carbon monoxide will fill the entire cryostat.

A pressure of 1 GPa is applied through the external operating rod of the cryostat to lock the diamond anvil device to encapsulate the carbon monoxide liquid in the high-pressure chamber. After that, close the air inlet valve of the cryostat, close the main valve of the gas cylinder, and slowly remove the cooling device under the cryostat to gradually heat up the cryostat. Open the cryostat's outlet valve and slowly discharge the carbon monoxide. Since the temperature of the cryostat is close to the boiling point of carbon monoxide, the rapid vaporization of liquid carbon monoxide will produce a large amount of gas, and the exhaust gas needs to be slowly discharged by controlling the outlet valve. When the pressure in the cryostat returns to normal pressure and the temperature reaches room temperature, the diamond anvil device can be taken out.

(4) Then, pressurize the mixture of RDX and carbon monoxide in the high-pressure chamber, with a pressurization rate of 1.5 GPa/min and a target pressure of 20 GPa. After the pressure reaches the target pressure, keep it for 0.5 hours, then slowly unload the pressure, and open the high-pressure chamber to obtain the desired high-tension bond energy release material p-CO/RDX with a composite structure. The prepared p-CO/RDX sample has a black appearance and a density of approximately 2.7g/cm ³ . The weight of p-CO is 65% relative to the total weight of the high-tension bond energy-releasing material with composite structure. It can be seen that as the p-CO content in the composite material increases, the density of the resulting high-tension bond energy-releasing material also increases.

Figure 5 shows the high-pressure Raman spectrum of p-CO-coated RDX (i.e. 65%-p-CO/RDX). Figure 5 shows that as the pressure increases to 4.4GPa, the Raman scattering peak of RDX tends to disappear, and the Raman peak of CO also gradually becomes smaller. When the pressure increases to 20 GPa, the Raman scattering peaks of RDX and CO completely disappear, and the Raman scattering peak of p-CO appears, indicating that CO has been completely polymerized.

Figure 6 shows the process of laser detonation of the high-tension bond energy release material 65%-p-CO/RDX with a composite structure. Photographed by high-speed CCD, the p-CO/RDX material can be detonated by a 0.5W, 635nm wavelength red laser. The entire explosion process was completed within 0.68ms, proving that the P-CO-coated RDX assembly structure material is a high-tension bond energy release material; at the same time, compared to 35%-p-CO/RDX, the explosion time is shorter, proving that as p -As the CO content increases, the explosive properties of p-CO/RDX composite materials increase. This material has good stability compared to pure p-CO, can resist water vapor and oxygen corrosion, and is suitable for more weapon scenarios.

Example 3

Preparation of high-tension bond energy-releasing material 50%-p-CO/HMX with composite structure.

(1) Preliminary preparation of the diamond anvil device, which includes the following steps:

Use a diamond anvil to pre-press the gasket made of T301 stainless steel so that an indentation appears in its center. Then, laser drilling is used to drill holes at the center of the gasket indentation. The punched hole is a high-pressure chamber for sample packaging and reaction. Then, fix the sealing pad at the indentation position on the lower anvil surface of the diamond anvil device. After that, the upper anvil, sealing pad and lower anvil are tightly closed, and then opened to a certain distance so that the distance between the upper and lower anvil surfaces is 0.6 mm for encapsulation of conventional energetic materials HMX and carbon monoxide mixtures.

(2) After cutting the HMX sample, place it into the high-pressure chamber of the prepared diamond anvil device, where the volume of the conventional energetic material HMX sample is 50% of the volume of the high-pressure chamber.

(3) Load carbon monoxide gas into the high-pressure cavity through low-temperature liquefaction, and then seal the high-pressure cavity by adjusting the relative position of the anvil of the high-pressure device; wherein the low-temperature liquefaction is performed by a method including the following steps:

Assemble the diamond anvil assembly into the cryostat cavity and seal the cryostat. Connect the assembled cryostat to the gas line and open the cryostat's outlet valve. Then, use the pressure reducing valve of the carbon monoxide cylinder and the air valve of the cryostat to control the flow rate of gaseous carbon monoxide so that it slowly enters the cryostat cavity and ventilates it for about 10 minutes to discharge the air in the cryostat cavity. Then close the carbon monoxide outlet valve of the cryostat.

Afterwards, the cryostat is placed in a liquid nitrogen environment to cool the cryostat device. The temperature and pressure status of the incoming gas are monitored in real time through the temperature and pressure sensors in the cryostat. When the temperature inside the cryostat drops below the boiling point of carbon monoxide gas, the gaseous carbon monoxide begins to gradually liquefy. Because the liquefaction of gas will release a large amount of heat, resulting in large changes in the local environment, the air pressure will fluctuate violently. After cooling down for 40 minutes, the temperature sensor showed that the boiling point of liquid nitrogen in the thermostat was around 77K, and at this time the gaseous carbon monoxide was liquefied in large quantities. Continue waiting for 60 minutes, and the liquid carbon monoxide will fill the entire cryostat.

A pressure of 0.8 GPa is applied through the external operating rod of the cryostat to lock the diamond anvil device to encapsulate the carbon monoxide liquid in the high-pressure chamber. After that, close the air inlet valve of the cryostat, close the main valve of the gas cylinder, and slowly remove the cooling device under the cryostat to gradually heat up the cryostat. Open the cryostat's outlet valve and slowly discharge the carbon monoxide. Since the temperature of the cryostat is close to the boiling point of carbon monoxide, the rapid vaporization of liquid carbon monoxide will produce a large amount of gas, and the exhaust gas needs to be slowly discharged by controlling the outlet valve. When the pressure in the cryostat returns to normal pressure and the temperature reaches room temperature, the diamond anvil device can be taken out.

(4) Then, pressurize the mixture of HMX and carbon monoxide in the high-pressure chamber, where the pressurization rate is 2GPa/min and the target pressure is 5.9GPa. After the pressure reaches the target pressure, keep it for 0.5 hours, then slowly unload the pressure, and open the high-pressure chamber to obtain the desired high-tension bond energy release material p-CO/HMX with a composite structure. The prepared p-CO/HMX sample has a black appearance and a density of approximately 2.3g/cm ³ . The weight of p-CO is 60% relative to the total weight of the high-tension bond energy-releasing material with composite structure. It can be seen that as the p-CO content in the composite material increases, the density of the resulting high-tension bond energy-releasing material also increases.

Figure 7 shows the normal pressure Raman spectrum of HMX.

Figure 8 shows the high-pressure Raman spectrum of p-CO-coated HMX (i.e., p-CO/HMX). Figure 8 shows that as the pressure increases to 4.8GPa, the Raman scattering peak of HMX tends to disappear. When the pressure increases to 5.9 GPa, the Raman scattering peaks of HMX and CO completely disappear, and the Raman scattering peak of p-CO appears, indicating that CO has been completely polymerized.

Figure 9 shows the process of laser detonation of the high-tension bond energy-releasing material p-CO/HMX with a composite structure. It was photographed by high-speed CCD that the p-CO/HMX material can be detonated by a 0.5W, 635nm wavelength red laser. The flame reaches the maximum value within 6.6ms, proving that the P-CO-coated HMX assembly structural material is a high-tension bond energy release material. This material has good stability compared to pure p-CO, can resist water vapor and oxygen corrosion, and is suitable for more weapon scenarios.

Claims (17)

1. A high tensile bond energy releasing material having a composite structure comprising p-CO and a conventional energetic material; wherein the p-CO is coated on a conventional energetic material to form a coating layer, and the conventional energetic material is selected from one or more of HMX, RDX, TNT, LLM-105 and FOX-7;

the high-tension bond energy release material with the composite structure is prepared by a method comprising the following steps:

s1, placing the conventional energetic material into a high-pressure cavity of a high-pressure device;

s2, loading carbon monoxide gas into the high-pressure cavity in a low-temperature liquefaction mode; sealing the high-pressure cavity;

and S3, pressurizing a mixture of a conventional energetic material and carbon monoxide in the high-pressure cavity to prepare the high-tension bond energy release material with the composite structure.

2. The high tensile bond energy releasing material having a composite structure according to claim 1, wherein the weight of the p-CO is 12-92% relative to the total weight of the high tensile bond energy releasing material having a composite structure.

3. The high tensile bond energy releasing material having a composite structure according to claim 2, wherein the weight of the p-CO is 45-65% relative to the total weight of the high tensile bond energy releasing material having a composite structure.

4. The high tensile bond energy releasing material having a composite structure according to claim 1, wherein the density of the high tensile bond energy releasing material having a composite structure is 2-6g/cm ³ 。

5. A method of preparing the high tensile bond energy releasing material having a composite structure of any one of claims 1-4, comprising the steps of:

s1, placing the conventional energetic material into a high-pressure cavity of a high-pressure device;

s2, loading carbon monoxide gas into the high-pressure cavity in a low-temperature liquefaction mode; sealing the high-pressure cavity;

and S3, pressurizing a mixture of a conventional energetic material and carbon monoxide in the high-pressure cavity to prepare the high-tension bond energy release material with the composite structure.

6. The method of claim 5, further comprising a step S0 of preparing the high-pressure device prior to step S1; the preparation step of the high-voltage device is performed by a method comprising the steps of:

s01, selecting a matched sealing pad according to the anvil area of the high-pressure device, and prepressing the sealing pad to enable the central position of the sealing pad to be provided with an indentation;

s02, punching holes in the center of the indentation of the sealing pad, wherein the holes are high-pressure cavities for sample packaging and reaction;

s03, fixing the sealing pad at the indentation position of the anvil surface under the high-pressure device;

s04, tightly pressing the upper anvil, the sealing gasket and the lower anvil, and then opening a certain interval for packaging the conventional energetic material and carbon monoxide mixture.

7. The method of claim 6, wherein the gasket is made of a material selected from T301 stainless steel, metallic rhenium, or metallic tungsten.

8. The method of claim 6, wherein the drilling is performed by laser drilling or mechanical drilling.

9. The method of claim 6, wherein the pitch is 0.3-0.5 mm.

10. The method of claim 5, wherein after the conventional energetic material is placed into the high pressure cavity of the high pressure device in step S1, the volume of the conventional energetic material is 10-90% of the volume of the high pressure cavity.

11. The method of claim 10, wherein after the conventional energetic material is placed into the high pressure cavity of the high pressure device in step S1, the volume of the conventional energetic material is 40-60% of the volume of the high pressure cavity.

12. The method according to claim 5, wherein the cryogenic liquefaction in step S2 is performed by a method comprising the steps of:

s21, assembling the high-pressure device into a cavity of a thermostat, and sealing the thermostat;

s22, introducing carbon monoxide gas into the thermostat;

s23, closing a carbon monoxide gas outlet valve of the thermostat, and cooling the thermostat together with the introduced carbon monoxide gas to a temperature interval between the melting point and the boiling point of carbon monoxide, so that the carbon monoxide gas is gradually liquefied and fills a high-pressure cavity of the high-pressure device and the thermostat;

s24, applying pressure to the high-pressure device through an external operating rod of the thermostat to seal carbon monoxide in the high-pressure cavity, and then closing a carbon monoxide air inlet valve of the thermostat and opening an air outlet valve;

s25. then, the temperature of the thermostat is raised or the high pressure pump is turned off to gradually vaporize the liquefied carbon monoxide remaining in the thermostat and discharge the same out of the thermostat, followed by taking out the high pressure device.

13. The method of claim 12, wherein the sealing of carbon monoxide in the high pressure chamber in step S24 applies a pressure in the range of 0.2-1GPa.

14. The method according to claim 5, wherein the pressurizing in step S3 is performed under the following conditions: the pressurizing speed is 0.5-2 GPa/min, and the target pressure after pressurizing is 5-100GPa.

15. The method of claim 5, wherein the high pressure device is selected from a multi-sided press, a two-sided press, or an annular press.

16. The method of claim 15, wherein the multi-sided top press is a hexahedral top press.

17. The method of claim 15, wherein the two-sided press is a paris-edinburgh press or a diamond anvil device.