Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第28卷    第9期    总第234期    2018年9月

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文章编号:1004-0609(2018)-09-1784-07
机械合金化法制备AlCoNiFeCr高熵合金涂层
蒋 烨,陈 可,王 伟

(南京农业大学 工学院,南京 210031)

摘 要: 利用机械合金化原理,在304不锈钢板表面制得AlCoNiFeCr高熵合金涂层。采用XRD、SEM、EDS、显微硬度测试和电化学腐蚀等技术分析涂层的组织结构、显微形貌、力学性能和耐腐蚀性能,并初步探讨合金层的形成机理。结果表明:随着球磨时间的增加,涂层厚度先增大后减小;当球磨时间为9 h时涂层最厚,平均厚度约为110 μm;当球磨时间为12 h时,涂层部分剥落。涂层的硬度明显高于基体的,且从表面到基体硬度呈梯度下降,硬度最高值达590HV0.1约为基体硬度的3倍。电化学腐蚀试验表明,涂层有效增加了基体的耐腐蚀性能。

 

关键字: 机械合金化;高熵合金涂层;显微硬度;耐腐蚀性

Preparation of AlCoNiFeCr high entropy alloy coating by mechanical alloying
JIANG Ye, CHEN Ke, WANG Wei

College of Engineering, Nanjing Agricultural University, Nanjing 210031, China

Abstract:AlCoNiFeCr high entropy alloy coating was prepared successfully on the surface of 304 stainless by mechanical alloying. The microstructure, mechanical properties and corrosion resistance of the coating were analyzed by XRD, SEM, EDS, microhardness test and electrochemical etching. The formation mechanism of the alloy layer was also discussed. The results show that with milling time increasing, the thickness of the coating increases at first and then decreases. The coating prepared by milling for 9 h is the densest with average thickness of 110 μm. When the milling time is prolonged to 12 h, part of the coating is peeled off. The micro-hardness of coating is significantly higher than that of the substrate, and declines gradually from the top surface to inner substrate. The maximum micro-hardness of the coating is up to 590HV0.1, about three times that of the substrate. Electrochemical corrosion tests show that the coating effectively increases the corrosion resistance of the matrix.

 

Key words: mechanical alloying; high entropy alloy coating; microhardness; corrosion resistance

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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