铝合金表面贯穿式复合涂层设计、制备及性能研究
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作者单位:

安阳工学院,安阳 455000

作者简介:

闫成旗,1988年出生,博士,研究方向为摩擦学功能材料与表面工程。E-mail:yanchengqi46@163.com

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中图分类号:

TB331

基金项目:

河南省自然科学基金(232300420325);河南省高等学校重点科研项目计划(22A430011);安阳市重点研发与推广专项(2022C01SF001);安阳工学院博士科研启动基金(BSJ2022029)


Design, Preparation and Properties of Through-type Composite Coating on Aluminum Alloy
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Anyang Institute of Technology,Anyang 455000

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    摘要:

    为了改善航空航天用铝合金的耐磨性能,尤其是保证在使用环境温度升高情况下铝合金的正常使用。本文在机械球磨涂层与基体之间扩散层形成原理的基础之上,设计三维立体状扩散层来增大涂层与基体之间结合性能;采用融合机械球磨、激光织构微孔和电沉积3种技术在铝合金表面制备贯穿式复合涂层,对复合涂层的力学和摩擦学性能进行测试分析。结果表明,电沉积Ni涂层完全覆盖了机械球磨涂层的织构表面,经过热处理后机械球磨涂层和电沉积涂层显微硬度分别约为285和165 HV,并且铝合金基体、机械球磨涂层和电沉积涂层3者界面处形成了三维立体结构扩散层。铝合金在室温情况下摩擦学性能表现正常,但在300 ℃下出现失效现象。针对4种复合涂层,室温下N150复合涂层的摩擦因数最低(约为0.7);300 ℃下N100、N150、N200复合涂层摩擦因数约为0.5。两种温度环境下4种样品的磨损率分布在(0.9~1.6)×10-3 mm3/(N·m),N100和N150复合涂层性能表现略好。采用该方法制备的贯穿式复合涂层在室温和300 ℃环境下有效的保护了铝合金基体,拓宽了铝合金的适用范围。

    Abstract:

    In order to improve the wear resistance of aerospace aluminum alloy, especially to ensure the normal use of aluminum alloy under increasing temperature, this study designs a three-dimensional diffusion layer to enhance the bonding between coating and the substrate. Through-thickness composite coating was prepared on the surface of aluminum alloy by means of mechanical ball milling, laser texture microporous and electrodeposition, the mechanical and tribological properties of the composite coating were tested and analyzed. The results show that the electrodeposited Ni coating completely covers the texture surface of mechanical milling coating, and the microhardness of mechanical milling coating and electrodeposition coating is about 285 and 165 HV respectively, after heat treatment. Moreover,a three-dimensional diffusion layer is formed at the interface of aluminum alloy substrate, mechanical milling coating and electrodeposition coating. The tribological properties of aluminum alloy perform normal at room temperature, but show signs of failure at 300℃.For four composite coatings, the friction coefficient of N150 composite coating is the lowest at room temperature, which is about 0.7. The friction coefficient of N100, N150 and N200 composite coatings is about 0.5 at 300℃. The wear rates of the four samples are in the range of (0.9~1.6)×10-3 mm3/(N·m) at room temperature and 300℃ with N100 and N150 composite coatings performing slightly better. The prepared composite coating can effectively protect the aluminum alloy substrate at room temperature and 300℃,and extend the applicable temperature of aluminum alloy.

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闫成旗,贾竹英.铝合金表面贯穿式复合涂层设计、制备及性能研究[J].宇航材料工艺,2023,53(6):54-58.

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  • 收稿日期:2022-07-27
  • 最后修改日期:2022-11-10
  • 录用日期:2022-11-10
  • 在线发布日期: 2023-12-15
  • 出版日期: 2023-12-30
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