A high-entropy alloy coating for thermal insulation protection
A high-entropy alloy and protective layer technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problem of no patent registration of high-entropy alloy coating, and achieve good toughness, low thermal conductivity, simplification and so on. The effect of the preparation process
Active Publication Date: 2020-09-25
BEIJING UNIV OF TECH
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Problems solved by technology
[0006] After searching, there is currently no patent report related to the technology of high-entropy alloy coating for heat insulation and protection involved in the present invention
Method used
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Embodiment 1
[0028] The atomic percentage of the element composition in the high-entropy alloy coating is as follows: Al: 21.5%; Co: 16.7%; Cr: 18%; Fe: 19%; Ni: 15%; Ti: 9.8%; and unavoidable impurities: <0.5%.
Embodiment 2
[0030] The mole percentages of element components in the high-entropy alloy coating are as follows: Al: 12.7%; Co: 15%; Cr: 17.5%; Fe: 18.6%; Ni: 17%; Ti: 19.2%; and unavoidable impurities: <0.5%.
Embodiment 3
[0032] The molar percentages of the element components in the high-entropy alloy coating are as follows: Al: 17.7%; Co: 22.6%; Cr: 16%; Fe: 15%; Ni: 17%; Ti: 11.7%; and unavoidable impurities: <0.5%.
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Abstract
The invention relates to a high-entropy alloy coating for thermal insulation protection, belonging to the technical field of a surface coating. High-entropy alloy powder prepared by a gas atomizationmethod is selected as a raw material, and the alloy powder which has good degree of sphericity and the particle size being 15-70 mu m is selected. The high-entropy alloy coating is prepared by an atmospheric plasma spraying method. The prepared coating maintains a good coating structure, high hardness and high toughness at medium and high temperatures and meanwhile has low and stable heat conductivity. The high-entropy alloy coating can be applied to the field of thermal insulation protection of a surface.
Description
Technical field [0001] The invention belongs to the field of surface coatings, and specifically relates to a high-entropy alloy coating material that can be applied to thermal engine (especially diesel engine) heat insulation protection. Background technique [0002] Diesel engines have higher compression ratio and higher fuel efficiency because they are not subject to the restriction of deflagration and the need for diesel spontaneous combustion. However, the defects of diesel engine in terms of weight and volume and insufficient combustion limit its development. Therefore, it is particularly important to improve the fuel utilization rate of diesel engines and reduce pollutant emissions. Therefore, the use of thermal barrier coatings can effectively reduce the cooling system used for thermal load components, promote the full conversion of thermal energy into mechanical energy, and improve the utilization rate of diesel engines. [0003] The research and development of thermal ba...
Claims
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IPC IPC(8): C23C4/134C23C4/073C22C30/00
CPCC22C30/00C23C4/073C23C4/134
Inventor 周正袁立陈立佳谈震吴旭王曾洁王国红贺定勇
Owner BEIJING UNIV OF TECH