CN105568024A - Preparation method for nano ceramic reinforced metal-matrix composite - Google Patents
Preparation method for nano ceramic reinforced metal-matrix composite Download PDFInfo
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- 239000000919 ceramic Substances 0.000 title claims abstract description 101
- 239000011156 metal matrix composite Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 70
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 39
- 239000000956 alloy Substances 0.000 claims abstract description 39
- 229910017706 MgZn Inorganic materials 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 239000011812 mixed powder Substances 0.000 claims abstract description 18
- 238000000889 atomisation Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 239000013078 crystal Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 description 12
- 239000002131 composite material Substances 0.000 description 11
- 229910033181 TiB2 Inorganic materials 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 7
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002114 nanocomposite Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
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- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
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Abstract
本发明公开了一种纳米陶瓷增强金属基复合材料的制备方法，以MgZn合金、纳米陶瓷颗粒为原料，将MgZn合金在雾化塔中熔化后，将熔融的MgZn合金从雾化塔上中部小孔流出，喷入高压气体，气体中掺杂纳米陶瓷颗粒，在气流和急冷作用下，液态的MgZn合金被雾化，纳米陶瓷颗粒被雾化后的液态MgZn合金包裹，形成液态金属包裹纳米陶瓷颗粒的球形结构，再经冷凝得到由MgZn合金包裹纳米陶瓷颗粒的球形混合粉体，将混合粉体在气氛炉中进行烧结，完成纳米陶瓷增强金属基复合材料的制备，纳米陶瓷颗粒的体积分数为10%~40%，雾化得到的球形混合粉体中均匀分散纳米陶瓷颗粒；烧结后，纳米陶瓷颗粒在MgZn合金的晶体内部分布均匀。所制备材料的致密度高于95%。
The invention discloses a method for preparing a nano-ceramic reinforced metal matrix composite material. Using MgZn alloy and nano-ceramic particles as raw materials, the MgZn alloy is melted in an atomizing tower, and the melted MgZn alloy is removed from the upper middle part of the atomizing tower. The hole flows out, and the high-pressure gas is injected, and the gas is doped with nano-ceramic particles. Under the action of air flow and rapid cooling, the liquid MgZn alloy is atomized, and the nano-ceramic particles are wrapped by the atomized liquid MgZn alloy to form a liquid metal-wrapped nano-ceramic. The spherical structure of the particles is condensed to obtain a spherical mixed powder with MgZn alloy wrapped nano-ceramic particles, and the mixed powder is sintered in an atmosphere furnace to complete the preparation of nano-ceramic reinforced metal matrix composites. The volume fraction of nano-ceramic particles It is 10%~40%, and the nano-ceramic particles are uniformly dispersed in the spherical mixed powder obtained by atomization; after sintering, the nano-ceramic particles are evenly distributed inside the crystal of the MgZn alloy. The density of the prepared material is higher than 95%.
Description
技术领域technical field
本发明涉及金属基复合材料领域，具体公开了一种纳米陶瓷增强金属基复合材料的制备方法。The invention relates to the field of metal-matrix composite materials, and specifically discloses a preparation method of nano-ceramics reinforced metal-matrix composite materials.
背景技术Background technique
随着当今科学技术的迅速发展，采用单一材料来满足人们生产和工作需要已经日趋困难，人们越来越多地采用复合技术制备高性能复合材料，以致使复合材料的研制和开发成为了当前材料科学与工程中的重要分支。With the rapid development of today's science and technology, it has become increasingly difficult to use a single material to meet people's production and work needs. More and more people use composite technology to prepare high-performance composite materials, so that the research and development of composite materials has become the current material. An important branch of science and engineering.
复合材料是由两种或多种性质不同的材料通过物理和化学复合，组成具有两个或两个以上相态结构的材料。该类材料不仅性能优于组成中的任意一个单独的材料，而且还可具有组分单独不具有的独特性能。而陶瓷颗粒因具备高比强度、比模量、耐磨、良好的尺寸稳定性等特点，可作为金属基复合材料中最重要的一种增强相，金属陶瓷复合材料是由延性的金属相和脆性的陶瓷相组成的一种典型的粒子增强材料。它的出现主要是基于二次世界大战后半期及其结束后的一段时间内，在对一种高温、高强材料的迫切要求形势下发展起来的。金属基陶瓷颗粒增强复合材料的显著特点是高强度、高硬度和优良的耐磨性。其在功效、可靠性和力学性能方面比传统金属合金优越，且性能主要取决于相界面的结合强度、晶粒尺寸等。如果通过改善陶瓷颗粒与金属熔体之间的润湿性，使金属层完全包围陶瓷相时，陶瓷颗粒增强相的晶粒尺寸越小，复合材料的强度越高。而且自Niihara报道经添加少量纳米颗粒到陶瓷基体中会显著提高材料的力学性能以来，纳米陶瓷颗粒增强相复合材料引起了材料研究者的广泛兴趣。近年来，纳米SiC颗粒增强Al基复合材料因为兼具金属和非金属的特性，已经成为纳米复合材料的一个研究热点。Composite materials are materials with two or more phase structures composed of two or more materials with different properties through physical and chemical compounding. This type of material not only has better performance than any single material in the composition, but also has unique properties that the components do not have alone. Ceramic particles can be used as the most important reinforcing phase in metal matrix composites because of their high specific strength, specific modulus, wear resistance, and good dimensional stability. Metal-ceramic composites are composed of ductile metal phases and A typical particle-reinforced material composed of a brittle ceramic phase. Its appearance was mainly based on the urgent demand for a high-temperature, high-strength material during the second half of World War II and the period after its end. The salient features of metal-based ceramic particle-reinforced composites are high strength, high hardness and excellent wear resistance. It is superior to traditional metal alloys in terms of efficacy, reliability and mechanical properties, and the performance mainly depends on the bonding strength of the phase interface, grain size, etc. If the metal layer completely surrounds the ceramic phase by improving the wettability between the ceramic particles and the metal melt, the smaller the grain size of the ceramic particle reinforced phase, the higher the strength of the composite material. And since Niihara reported that adding a small amount of nanoparticles to the ceramic matrix can significantly improve the mechanical properties of the material, nano-ceramic particle-reinforced phase composites have aroused widespread interest in materials researchers. In recent years, nano-SiC particle-reinforced Al-based composites have become a research hotspot in nanocomposites because they have both metallic and non-metallic properties.
然而陶瓷增强体颗粒在基体中的分布均匀性是影响陶瓷颗粒增强金属基复合材料力学性能的重要因素。而纳米陶瓷颗粒增强相的分散问题，即如何将纳米增强相单元体分散在金属基体中，使之不团聚而保持纳米尺寸的单个体，是使得金属基纳米复合材料实现充分发挥其纳米效应必须解决的首要问题。但现今为止，还没有找到十分有效的分散方法可以对团聚状态的纳米粉体在金属基体中进行分散。However, the distribution uniformity of ceramic reinforcement particles in the matrix is an important factor affecting the mechanical properties of ceramic particle reinforced metal matrix composites. The dispersion of the nano-ceramic particle reinforcement phase, that is, how to disperse the nano-reinforcement phase unit body in the metal matrix, so that it does not agglomerate and maintain a nano-sized individual body, is a must for metal-based nanocomposites to fully exert their nano-effects. the primary problem to be solved. But so far, no very effective dispersion method has been found to disperse the agglomerated nanopowder in the metal matrix.
发明内容Contents of the invention
本发明的目的是提供一种纳米陶瓷增强金属基复合材料的制备方法。本发明制得的纳米陶瓷增强金属基复合材料，纳米陶瓷颗粒在MgZn合金晶体内部均匀分布，很大程度上提高其力学性能。The purpose of the present invention is to provide a preparation method of nano ceramic reinforced metal matrix composite material. In the nano-ceramic reinforced metal matrix composite material prepared by the invention, the nano-ceramic particles are evenly distributed inside the MgZn alloy crystal, thereby improving its mechanical properties to a large extent.
本发明是通过以下技术方案予以实现的：The present invention is achieved through the following technical solutions:
本发明提供的一种纳米陶瓷增强金属基复合材料的制备方法，以MgZn合金、纳米陶瓷颗粒为原料，将MgZn合金在雾化塔中熔化后，将熔融的MgZn合金从雾化塔上中部小孔流出，同时喷入高压气体，气体中掺杂纳米陶瓷颗粒，在气流的机械力和急冷作用下，液态的MgZn合金被雾化，同时纳米陶瓷颗粒被雾化后的液态MgZn合金包裹，形成液态金属包裹纳米陶瓷颗粒的球形结构，再经冷凝得到由MgZn合金包裹纳米陶瓷颗粒的球形混合粉体，将混合粉体在气氛炉中进行烧结，完成纳米陶瓷增强金属基复合材料的制备，其中：The preparation method of a nano-ceramic reinforced metal matrix composite material provided by the present invention uses MgZn alloy and nano-ceramic particles as raw materials, melts the MgZn alloy in the atomization tower, and then melts the molten MgZn alloy from the upper middle part of the atomization tower. The hole flows out, and the high-pressure gas is injected at the same time. The gas is doped with nano-ceramic particles. Under the mechanical force and rapid cooling of the gas flow, the liquid MgZn alloy is atomized, and at the same time, the nano-ceramic particles are wrapped by the atomized liquid MgZn alloy to form The liquid metal wraps the spherical structure of nano-ceramic particles, and then condenses to obtain spherical mixed powders wrapped by MgZn alloy nano-ceramic particles. The mixed powder is sintered in an atmosphere furnace to complete the preparation of nano-ceramic reinforced metal matrix composites. :
(1)纳米陶瓷颗粒的体积分数为10％～40％，雾化得到的球形混合粉体中均匀分散纳米陶瓷颗粒；(1) The volume fraction of nano-ceramic particles is 10% to 40%, and the nano-ceramic particles are uniformly dispersed in the spherical mixed powder obtained by atomization;
(2)烧结后，纳米陶瓷颗粒在MgZn合金的晶体内部分布均匀。(2) After sintering, the nano-ceramic particles are evenly distributed inside the crystal of the MgZn alloy.
所述的纳米陶瓷颗粒为SiC或TiB2。The nano ceramic particles are SiC or TiB 2 .
上述方法制备得到的纳米陶瓷增强金属基复合材料的致密度高于95％，且其晶粒内部均匀分布纳米陶瓷颗粒，屈服强度为700～1000MPa，比强度为300～700KN·m/Kg，比模量为40～70MN·m/Kg。The density of the nano-ceramic reinforced metal matrix composite prepared by the above method is higher than 95%, and the nano-ceramic particles are evenly distributed inside the crystal grains, the yield strength is 700-1000MPa, and the specific strength is 300-700KN·m/Kg. The modulus is 40-70MN·m/Kg.
本发明以MgZn合金、纳米陶瓷颗粒为原料，将MgZn合金在雾化塔中熔化后，将熔融的MgZn合金从雾化塔上中部小孔流出，同时喷入高压气体，气体中掺杂纳米陶瓷颗粒，在气流的机械力和急冷作用下，液态的MgZn合金被雾化，同时纳米陶瓷颗粒被雾化后的液态MgZn合金包裹，形成液态金属包裹纳米陶瓷颗粒的球形结构，再经冷凝得到由MgZn合金包裹纳米陶瓷颗粒的球形混合粉体，将混合粉体在气氛炉中进行烧结，完成纳米陶瓷增强金属基复合材料的制备。本发明与现有技术相比，具有如下有益效果：The invention uses MgZn alloy and nano-ceramic particles as raw materials, melts the MgZn alloy in the atomization tower, flows out the molten MgZn alloy from the small hole in the upper middle of the atomization tower, and simultaneously injects high-pressure gas, and the gas is doped with nano-ceramic Particles, under the mechanical force and rapid cooling of the airflow, the liquid MgZn alloy is atomized, and the nano-ceramic particles are wrapped by the atomized liquid MgZn alloy to form a spherical structure of liquid metal-wrapped nano-ceramic particles, and then condensed to obtain The spherical mixed powder of nano-ceramic particles wrapped by MgZn alloy is sintered in an atmosphere furnace to complete the preparation of nano-ceramic reinforced metal matrix composites. Compared with the prior art, the present invention has the following beneficial effects:
(1)通过利用纳米陶瓷颗粒(SiC，TiB2)与MgZn合金之间良好的润湿性，采用雾化法，实现了纳米陶瓷颗粒在熔体金属中均匀分散。(1) By utilizing the good wettability between nano-ceramic particles (SiC, TiB 2 ) and MgZn alloy, the atomization method is used to achieve uniform dispersion of nano-ceramic particles in molten metal.
(2)通过采用粉末冶金的方法，烧结制备得到在金属基陶瓷复合材料中，纳米陶瓷颗粒在MgZn合金晶体内部均匀分布，很大程度上提高其力学性能；(2) By adopting the method of powder metallurgy and sintering, in the metal matrix ceramic composite material, the nano-ceramic particles are evenly distributed inside the MgZn alloy crystal, which greatly improves its mechanical properties;
(3)通过本发明，实现了一种纳米陶瓷增强金属基复合材料的制备。(3) Through the present invention, the preparation of a nano ceramic reinforced metal matrix composite material is realized.
附图说明Description of drawings
图1为本发明雾化过程示意图；Fig. 1 is a schematic diagram of the atomization process of the present invention;
图2为本发明纳米陶瓷增强金属基复合材料制备的烧结过程示意图。Fig. 2 is a schematic diagram of the sintering process for preparing the nano ceramic reinforced metal matrix composite material of the present invention.
具体实施方式detailed description
下面所示为附图和具体实施例对本发明做进一步详细、完整地说明，但决非限制本发明，本发明也并非仅局限于下述实施例的内容，下述所使用的实验方法若无特殊说明，均为本技术领域现有常规的方法，所使用的配料或材料，如无特殊说明，均为通过商业途径可得到的配料或材料。下面给出实施案例：Shown below is accompanying drawing and specific embodiment that the present invention is described in further detail and completely, but in no way limits the present invention, and the present invention is not limited to the content of following embodiment either, if the experimental method used below does not have Special instructions are existing conventional methods in this technical field, and the ingredients or materials used, unless otherwise specified, are all ingredients or materials available through commercial channels. The implementation example is given below:
实施例1Example 1
一种纳米陶瓷增强金属基复合材料的制备，具体方法如下：A preparation of nano-ceramics reinforced metal matrix composites, the specific method is as follows:
(1)以Mg2Zn合金和SiC纳米陶瓷颗粒B为原料，SiC的粒径为40nm，将熔融的Mg2Zn合金A从雾化塔上中部小孔流出，同时喷入高压Ar气体，气体中掺杂SiC纳米陶瓷颗粒B，在Ar气流的机械力和急冷作用下，液态Mg2Zn合金A被雾化，同时SiC纳米陶瓷颗粒B被雾化后的液态Mg2Zn合金A包裹，形成液态金属包裹SiC纳米陶瓷颗粒的结构，再经冷凝成细小粒状的金属粉末落入雾化塔下的盛粉桶中，得到由Mg2Zn合金包裹纳米SiC的球形混合粉体颗粒C，颗粒大小为50μm，引入纳米SiC的体积分数为20％，。(1) Using Mg2Zn alloy and SiC nano-ceramic particles B as raw materials, the particle size of SiC is 40nm, the molten Mg2Zn alloy A flows out from the small hole in the upper middle of the atomization tower, and at the same time sprays high-pressure Ar gas, and the gas is doped with SiC Nano-ceramic particles B, under the mechanical force and rapid cooling of the Ar gas flow, the liquid Mg2Zn alloy A is atomized, and at the same time, the SiC nano-ceramic particles B are wrapped by the atomized liquid Mg2Zn alloy A, forming a liquid metal-wrapped SiC nano-ceramic particles structure, and then the metal powder condensed into fine particles falls into the powder bucket under the atomization tower to obtain spherical mixed powder particles C wrapped with nano-SiC by Mg2Zn alloy, the particle size is 50 μm, and the volume fraction of nano-SiC introduced is 20 %,.
(2)将混合粉体经干压成型后，再经过200MPa的冷等静压后，在真空中进行烧结，以5℃/min的升温速度将温度升到600℃保温2h，通过这种烧结方式获得纳米陶瓷增强金属基复合材料。(2) After the mixed powder is formed by dry pressing, and then subjected to cold isostatic pressing at 200 MPa, it is sintered in a vacuum, and the temperature is raised to 600 °C at a heating rate of 5 °C/min for 2 hours. Through this sintering way to obtain nano-ceramic reinforced metal matrix composites.
本实施例得到的纳米陶瓷增强金属基复合材料的致密度为99％，且纳米陶瓷颗粒B在金属基的晶界D内部均匀分布，屈服强度为800MPa，比强度为450KN·m/Kg，比模量为50MN·m/Kg。The density of the nano-ceramic reinforced metal matrix composite material obtained in this example is 99%, and the nano-ceramic particles B are evenly distributed inside the grain boundary D of the metal matrix, the yield strength is 800MPa, and the specific strength is 450KN·m/Kg. The modulus is 50MN·m/Kg.
实施例2Example 2
以Mg2Zn合金和TiB2纳米陶瓷颗粒为原料，TiB2的粒径为60nm，在Ar气氛下雾化后，得到颗粒大小为30μm的粉体，引入纳米TiB2的体积分数为20％。将混合粉体经热压烧结，烧结气氛为Ar，烧结工艺为5℃/min的升温速度将温度升到400℃保温3h，加压30MPa，通过这种烧结方式获得纳米陶瓷增强金属基复合材料。制备得到的纳米陶瓷增强金属基复合材料的致密度为99％，且其晶粒内部均匀分布纳米陶瓷颗粒，屈服强度为850MPa，比强度为500KN·m/Kg，比模量为55MN·m/Kg。Mg2Zn alloy and TiB2 nano - ceramic particles are used as raw materials. The particle size of TiB2 is 60nm. After atomization under Ar atmosphere, a powder with a particle size of 30μm is obtained, and the volume fraction of nano-TiB2 introduced is 20 %. The mixed powder is sintered by hot pressing, the sintering atmosphere is Ar, the sintering process is a heating rate of 5°C/min, the temperature is raised to 400°C for 3 hours, and the pressure is 30MPa. Through this sintering method, nano-ceramic reinforced metal matrix composites are obtained. . The density of the prepared nano-ceramic reinforced metal matrix composite is 99%, and nano-ceramic particles are evenly distributed inside the crystal grains. The yield strength is 850MPa, the specific strength is 500KN m/Kg, and the specific modulus is 55MN m/Kg. Kg.
实施例3Example 3
以Mg6Zn合金和TiB2纳米陶瓷颗粒为原料，TiB2的粒径为30nm，在Ar气氛下雾化后，得到颗粒大小为20μm的粉体，引入纳米TiB2的体积分数为40％。将混合粉体成型后经SPS(放电等离子)烧结，烧结气氛为Ar，烧结工艺为50℃/min的升温速度将温度升到450℃保温0.5h，通过这种烧结方式获得纳米陶瓷增强金属基复合材料。制备得到的纳米陶瓷增强金属基复合材料的致密度为99％，且其晶粒内部均匀分布纳米陶瓷颗粒，屈服强度为900MPa，比强度为550KN·m/Kg，比模量为60MN·m/Kg。Mg6Zn alloy and TiB2 nano - ceramic particles are used as raw materials. The particle size of TiB2 is 30nm. After atomization under Ar atmosphere, a powder with a particle size of 20μm is obtained, and the volume fraction of nano - TiB2 introduced is 40%. After the mixed powder is formed, it is sintered by SPS (spark plasma). The sintering atmosphere is Ar. The sintering process is a heating rate of 50°C/min. The temperature is raised to 450°C and kept for 0.5h. Through this sintering method, nano-ceramic reinforced metal matrix is obtained. composite material. The density of the prepared nano-ceramic reinforced metal matrix composite is 99%, and nano-ceramic particles are evenly distributed inside the crystal grains. The yield strength is 900MPa, the specific strength is 550KN m/Kg, and the specific modulus is 60MN m/Kg. Kg.
实施例4Example 4
以Mg6Zn合金和SiC纳米陶瓷颗粒为原料，SiC的粒径为80nm，在Ar气氛下雾化后，得到颗粒大小为100μm的粉体，引入纳米SiC的体积分数为25％。将混合粉体成型后经气压烧结，烧结气氛为Ar，烧结工艺为5℃/min的升温速度将温度升到500℃保温3h，加压10MPa，通过这种烧结方式获得纳米陶瓷增强金属基复合材料。制备得到的纳米陶瓷增强金属基复合材料的致密度为99％，且其晶粒内部均匀分布纳米陶瓷颗粒，屈服强度为750MPa，比强度为400KN·m/Kg，比模量为45MN·m/Kg。Mg6Zn alloy and SiC nano-ceramic particles are used as raw materials. The particle size of SiC is 80nm. After atomization in Ar atmosphere, a powder with a particle size of 100 μm is obtained, and the volume fraction of nano-SiC introduced is 25%. After the mixed powder is formed, it is sintered by air pressure. The sintering atmosphere is Ar. The sintering process is a heating rate of 5°C/min. The temperature is raised to 500°C for 3 hours, and the pressure is 10MPa. Through this sintering method, nano-ceramic reinforced metal matrix composites are obtained. Material. The density of the prepared nano-ceramic reinforced metal matrix composite is 99%, and nano-ceramic particles are evenly distributed inside the crystal grains. The yield strength is 750MPa, the specific strength is 400KN m/Kg, and the specific modulus is 45MN m/Kg. Kg.
实施例5Example 5
以Mg6Zn合金和TiB2纳米陶瓷颗粒为原料，TiB2的粒径为20nm，在Ar气氛下雾化后，得到颗粒大小为10μm的粉体，引入纳米TiB2的体积分数为30％。将混合粉体成型后经无压烧结，烧结气氛真空，烧结工艺为5℃/min的升温速度将温度升到500℃保温3h，通过这种烧结方式获得纳米陶瓷增强金属基复合材料。制备得到的纳米陶瓷增强金属基复合材料的致密度为99％，且其晶粒内部均匀分布纳米陶瓷颗粒，屈服强度为800MPa，比强度为450KN·m/Kg，比模量为50MN·m/Kg。Mg6Zn alloy and TiB2 nano - ceramic particles are used as raw materials. The particle size of TiB2 is 20nm. After atomization under Ar atmosphere, a powder with a particle size of 10μm is obtained, and the volume fraction of nano - TiB2 introduced is 30%. After the mixed powder is formed, it is sintered without pressure, and the sintering atmosphere is vacuum. The sintering process is 5°C/min, and the temperature is raised to 500°C for 3 hours. Through this sintering method, nano-ceramic reinforced metal matrix composites are obtained. The density of the prepared nano-ceramic reinforced metal matrix composite is 99%, and nano-ceramic particles are evenly distributed inside the crystal grains. The yield strength is 800MPa, the specific strength is 450KN m/Kg, and the specific modulus is 50MN m/Kg. Kg.
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| CN106424746A (en) * | 2016-10-31 | 2017-02-22 | 湖南航天新材料技术研究院有限公司 | Device and method for preparing metal ceramic composite powder material |
| CN107695344A (en) * | 2017-09-08 | 2018-02-16 | 张家港创博金属科技有限公司 | Composition metal bead preparation method and device |
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