CN109440048A - A kind of aluminium-based amorphous alloy coating of ultrahigh relative density and preparation method thereof - Google Patents
A kind of aluminium-based amorphous alloy coating of ultrahigh relative density and preparation method thereof Download PDFInfo
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- CN109440048A CN109440048A CN201811572288.4A CN201811572288A CN109440048A CN 109440048 A CN109440048 A CN 109440048A CN 201811572288 A CN201811572288 A CN 201811572288A CN 109440048 A CN109440048 A CN 109440048A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
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Abstract
The invention discloses aluminium-based amorphous alloy coating of a kind of ultrahigh relative density and preparation method thereof, which has the ultralow porosity i.e. characteristic of ultrahigh relative density, belongs to amorphous alloy coating technical field.The present invention uses and currently forms the optimal al based amorphous alloy component system (Al-TM-RE) of ability, it is prepared by supersonic air flame-spraying (HVAF) technology, optimized by technological design and experimental method, this preparation method preparation process is stablized, the aluminium-based amorphous alloy coating porosity of prepared acquisition is minimum up to 0.1%, has a ultrahigh relative density, coating surface molten state is good and amorphous degree >=70% of coating, and has good corrosion resistance.
Description
Technical field
The present invention relates to amorphous coating technical fields, and in particular to a kind of the aluminium-based amorphous alloy coating and its system of ultrahigh relative density
Preparation Method, the preparation method provide guidance to other amorphous coating preparation sciences.
Background technique
Comparing traditional aluminum alloy materials, al based amorphous alloy has a performance for being far more than traditional aluminium alloy, such as low-density,
The series of advantages such as high intensity, high tenacity, superplasticity and excellent corrosion resistance are a kind of more wide novel gold of application prospect
Belong to material.However its limited amorphous formation ability significantly limits its development and application, and al based amorphous alloy is at room temperature
Plastic deformation ability is poor, this all limits its application as structural material.Therefore, aluminium base is obtained by spraying technology of preparing
Amorphous coating is a kind of effective way to solve the above problems, and aluminium-based amorphous alloy coating can keep al based amorphous alloy good wear-resisting
Performance, and high rigidity is had both simultaneously, high corrosion resistance is the optimal selection under warship's safety and other stringent environmental requirements.
Preparing the major technique of al based amorphous alloy coating at present is supersonic flame spraying technology, by supersonic flame spraying system
Standby coating, improves molten drop effluxvelocity and reduces the degree of superheat of particle, it is easier to the coating with non crystalline structure is obtained,
But during the preparation process, it is unavoidable be hole formation.
Hole generates important influence to the service performance and service life of coating as a kind of important fault of construction.It applies
Layer porosity is an important indicator for characterizing coating consistency, and the major criterion of evaluation coating quality superiority and inferiority, porosity
Height can reflect the quality of coating quality to a certain extent.Porosity represents coating structure state, when porosity is big, water
In the corrosive medium that contains be easy to be deep into coating, or even touch matrix, cause the corrosion failure of coat inside, not only shadow
It rings and arrives microhardness, can also reduce bond strength.Therefore, porosity is affected to coating anti-erosion performance, reduces porosity
It is one of anti scuffing coating technology research emphasis.Hole Producing reason essentially consists in the grain of melting or semi-molten in spraying process
Son during particle is staggeredly superimposed and forms coating, is stacked and is deposited between particle since the parameters such as flying speed and temperature are different
In gas gap etc., the filling of molten particles is prevented, hole is ultimately formed.It is applied at present by the aluminium-based amorphous alloy of HVAF preparation
Layer has many advantages, such as that high rigidity, coating and substrate combinating strength are high, abrasion resistance is good, but how to reduce or even avoid hole
It is formed, is always the problem for preparing amorphous alloy coating.The aluminium-based amorphous alloy coating of ultrahigh relative density is obtained, while guaranteeing that aluminium base is non-
Crystal coating has good amorphous degree and corrosion resistance, is always the difficult point of al based amorphous alloy coating preparation.
Summary of the invention
The purpose of invention: aiming at the defects existing in the prior art, it is fine and close that the present invention provides a kind of superelevation
Aluminium-based amorphous alloy coating of degree and preparation method thereof, the coating have the ultralow porosity i.e. characteristic of ultrahigh relative density, belong to amorphous
Alloy coat technical field.The present invention uses and currently forms the optimal al based amorphous alloy component system (Al-TM-RE) of ability,
It is prepared by supersonic air flame-spraying (HVAF) technology, this preparation method preparation process is stablized, the aluminium base of prepared acquisition
Amorphous coating porosity is minimum up to 0.1%, has a ultrahigh relative density, and coating surface molten state is good and the amorphous degree of coating
>=70%, and have good corrosion resistance.
To achieve the above object, the technical solution adopted in the present invention is as follows:
A kind of aluminium-based amorphous alloy coating of ultrahigh relative density, the coating have the ultralow porosity i.e. characteristic of ultrahigh relative density,
The preparation method uses HVAF technology, and raw material chooses Al-TM-RE system amorphous powdered alloy, and Al content in component system >=
85wt.%, Co or Ni element, which are chosen, is used as the excessive race's element of TM, and La or Y choose and be used as RE rare earth element.Prepared acquisition
Aluminium-based amorphous alloy coating consistency superelevation, coating porosity≤0.1 are provided simultaneously with high amorphous degree, and in specific saltwater environment
Has very strong resistance to corrosion.
A kind of preparation method of the aluminium-based amorphous alloy coating of ultrahigh relative density, prepares aluminium-based amorphous alloy coating process using HVAF method
Parameter is as follows:
(1) air mass flow chooses 90-95PSI, fuel quantity 85-95PSI.Increase fuel availability, guarantees coating surface powder
Last melting state is good.
(2) spray distance is chosen between 160-170mm, is guaranteed powder moving distance sufficiently, is increased powder cooling rate,
Improve coating amorphous degree >=70% prepared.
(3) spray gun speed 1m/s guarantees that powder jet is stablized, and spraying uniformly, improves the bond strength between coating and substrate.
(4) powder feeding rate chooses 4-5r/min.
(5) spraying substrate rear is purged using nitrogen, and air pressure is chosen between 3-5MPa, and it is cold to accelerate substrate using high-speed gas
But rate improves coating amorphous degree.
It advantages of the present invention and has the beneficial effect that:
1, technology of preparing of the present invention prepares aluminium-based amorphous alloy coating using supersonic air flame spray technique (HVAF), chooses
Air mass flow is 90-95PSI, fuel quantity 85-95PSI, fully ensures that fuel availability, improves coating surface particles fuse effect
Fruit.
2, technology of preparing spray distance of the present invention is chosen between 160-170mm, is guaranteed powder moving distance sufficiently, is increased
Powder cooling rate improves coating amorphous degree >=70% prepared.Spray gun speed 1m/s, powder feeding rate 4-5r/min are protected
It demonstrate,proves powder jet to stablize, spraying uniformly, improves the bond strength between coating and substrate, while in spraying process, at substrate rear
Using high pressure nitrogen blowing method, 3-5MPa is chosen in air pressure, and high-speed jet gas will effectively improve substrate cooling rate, Jin Erti
The content of amorphous of high alumina base amorphous alloy coating.
3, aluminium-based amorphous alloy coating porosity≤0.1% that the present invention prepares, has ultrahigh relative density, while coating is non-
Brilliant degree >=70%, and there is stronger anti-local corrosion ability.The present invention refers to the preparation offer of other amorphous alloy coatings
It leads.
Detailed description of the invention
Fig. 1 is the XRD spectrum of the aluminium-based amorphous alloy coating obtained using three kinds of different process.
Fig. 2 is the aluminium-based amorphous alloy coating SEM image obtained using the technique of comparative example 3.
Fig. 3 is the aluminium-based amorphous alloy coating SEM image obtained using the technique of comparative example 4.
Fig. 4 is the aluminium-based amorphous alloy coating SEM image obtained using the technique of embodiment.
Fig. 5 is the aluminium-based amorphous alloy coating 3D hole map obtained using the technique of comparative example 3.
Fig. 6 is the aluminium-based amorphous alloy coating 3D hole map obtained using the technique of comparative example 4.
Fig. 7 is the aluminium-based amorphous alloy coating 3D hole map obtained using the technique of embodiment.
Fig. 8 is the aluminium-based amorphous alloy coating polarization curve obtained using three kinds of different process.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and embodiments.
Embodiment:
A kind of aluminium-based amorphous alloy coating of ultrahigh relative density proposed by the present invention, preparation method are as follows: use HVAF supersonic speed
Flame spray technique, air choose 90-95PSI, fuel quantity 85-95PSI, increase fuel availability, guarantee coating surface powder
Melting state is good；Spray distance is chosen between 160-170mm, guarantees powder moving distance sufficiently, increases the cooling speed of powder
Rate improves coating amorphous degree >=70% prepared；Spray gun speed 1m/s, powder feeding rate choose 4-5r/min, guarantee powder
Jet stability, spraying uniformly, improve the bond strength between coating and substrate, while in spraying process, at substrate rear using high
Nitrogen blowing method is pressed, 3-5MPa is chosen in air pressure, and high-speed jet gas will effectively improve substrate cooling rate, and then improve aluminium base
The content of amorphous of amorphous alloy coating.
A kind of aluminium-based amorphous alloy coating of ultrahigh relative density prepared by preparation method of the present invention, amorphous degree is good, referring to Fig. 1 institute
Show, can be seen that the aluminium-based amorphous alloy coating prepared using this preparation method by the 3# curve of XRD analysis, amorphous degree is good, only
There is minimal amount of α-Al to be mutually precipitated, is amorphous steamed bun peak more than 70%.Meanwhile the aluminium-based amorphous alloy obtained using this preparation method
Coating consistency superelevation, by the SEM image analysis of Fig. 2~4 it is known that the 3# amorphous coating obtained using this preparation method
Sample surfaces porosity is minimum, and coating cross sections are smooth.The 3D porosity measurement of Fig. 5~7 is also, it is apparent that represent hole simultaneously
The color grains of gap are calculated, 3# aluminium obviously compared with fewer than 1# and 2# sample after being compared by the occupancy volume with matrix
Base amorphous coating porosity is 0.1%.Finally, had using the aluminium-based amorphous alloy coating that this preparation method obtains certain anticorrosive
Ability, as shown in figure 8, wherein 3# coating spot corrosion point is apparently higher than other two kinds of coatings.
Comparative example 1:
With embodiment the difference is that: spray distance choose 150mm, the Al base amorphous coating amorphous degree prepared
Low, concrete analysis is as shown in figure 1 shown in 1# curve.
Comparative example 2:
With embodiment the difference is that: spray distance choose 140mm, there are more for the Al base amorphous coating prepared
Crystal phase, concrete analysis is as shown in figure 1 shown in 2# curve.
Comparative example 3:
With embodiment the difference is that: spray distance chooses 180mm, in the Al base amorphous coating prepared defect compared with
It is more, a large amount of holes are formed, are made a concrete analysis of as shown in 1# image in Fig. 2 and Fig. 5.
Comparative example 4:
With embodiment the difference is that: spray gun speed 1.5m/s, powder feeding rate choose 3r/min.Powder in preparation process
Melting rate is substantially reduced, and coating unevenly results in a large amount of holes, is made a concrete analysis of as shown in 2# image in Fig. 3 and Fig. 6.
Comparative example 5:
With embodiment the difference is that: spray gun speed 0.5m/s, powder feeding rate choose 6r/min.The aluminium base finally obtained
Amorphous coating corrosion resisting property is low, as shown in 1# curve in Fig. 8.
Comparative example 6:
With embodiment the difference is that: air mass flow choose 100PSI, fuel quantity choose 80PSI, powder fusing do not fill
Dividing leads to the reduction of amorphous degree, corrosion resisting property sharp fall, as shown in 2# curve in Fig. 8.
Found out by above embodiments and comparative example, the invention discloses a kind of aluminium-based amorphous alloy coating of ultrahigh relative density and
Preparation method, the coating have the ultralow porosity i.e. characteristic of ultrahigh relative density.The present invention is best using ability is currently formed
Al based amorphous alloy component system (Al-TM-RE), pass through supersonic air flame-spraying (HVAF) technology prepare, this preparation
Method preparation process is stablized, and the aluminium-based amorphous alloy coating porosity of prepared acquisition is minimum to have ultrahigh relative density up to 0.1%,
Coating surface molten state is good and amorphous degree >=70% of coating, and has good corrosion resistance.This technology of preparing
Also the preparation for other system amorphous alloy coatings provides guidance.
Claims (4)
1. a kind of aluminium-based amorphous alloy coating of ultrahigh relative density, which is characterized in that it is prepared using supersonic air flame spray technique,
Raw material chooses Al-TM-RE system amorphous powdered alloy, Al content >=85wt.% in component system, Co or Ni element chooses conduct
The excessive race's element of TM, La or Y, which choose, is used as RE rare earth element.
2. the aluminium-based amorphous alloy coating of ultrahigh relative density as described in claim 1, it is characterised in that: Al-TM-RE system amorphous alloy
Powder diameter is 18-53 μm.
3. the preparation method of the aluminium-based amorphous alloy coating of ultrahigh relative density as described in claim 1, which is characterized in that use Supersonic
The technological parameter that fast air flame spray coating method prepares aluminium-based amorphous alloy coating is as follows:
(1) air mass flow chooses 90-95PSI, fuel quantity 85-95PSI；
(2) spray distance is 160-170mm；
(3) spray gun speed is 1m/s；
(4) powder feeding rate is 4-5r/min；
(5) it is purged after spraying substrate using nitrogen.
4. the preparation method of the aluminium-based amorphous alloy coating of ultrahigh relative density according to claim 3, which is characterized in that nitrogen is blown
3-5MPa is chosen in air pressure when sweeping.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306148A (en) * | 2019-06-26 | 2019-10-08 | 中国石油大学(华东) | Method for preparing aluminum-based amorphous layer by combined thermal spraying and electron beam remelting technology |
| CN114686793A (en) * | 2022-03-08 | 2022-07-01 | 辽宁石油化工大学 | High-compactness nickel-based completely amorphous coating and preparation method thereof |
| CN115141998A (en) * | 2021-09-08 | 2022-10-04 | 武汉苏泊尔炊具有限公司 | Amorphous alloy coating and preparation method thereof |
| CN115612965A (en) * | 2022-10-20 | 2023-01-17 | 辽宁石油化工大学 | A kind of preparation method of completely amorphous coating |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110306148A (en) * | 2019-06-26 | 2019-10-08 | 中国石油大学(华东) | Method for preparing aluminum-based amorphous layer by combined thermal spraying and electron beam remelting technology |
| CN115141998A (en) * | 2021-09-08 | 2022-10-04 | 武汉苏泊尔炊具有限公司 | Amorphous alloy coating and preparation method thereof |
| CN115141998B (en) * | 2021-09-08 | 2023-09-29 | 武汉苏泊尔炊具有限公司 | Amorphous alloy coating and preparation method thereof |
| CN114686793A (en) * | 2022-03-08 | 2022-07-01 | 辽宁石油化工大学 | High-compactness nickel-based completely amorphous coating and preparation method thereof |
| CN114686793B (en) * | 2022-03-08 | 2023-05-19 | 辽宁石油化工大学 | A high-density nickel-based completely amorphous coating and its preparation method |
| CN115612965A (en) * | 2022-10-20 | 2023-01-17 | 辽宁石油化工大学 | A kind of preparation method of completely amorphous coating |
| CN115612965B (en) * | 2022-10-20 | 2024-05-24 | 辽宁石油化工大学 | Preparation method of completely amorphous coating |
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