Characterization and properties of CuZrAlTiNi high entropy alloy coating obtained by mechanical alloying and vacuum hot pressing sintering
Characterization and properties of CuZrAlTiNi high entropy alloy coating obtained by mechanical alloying and vacuum hot pressing sintering
复制标题
机械合金化真空热压烧结CuZrAlTiNi高熵合金涂层的表征与性能
DOI：
10.1016/j.apt.2017.07.006
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发表时间：
2017-10-01
影响因子：
5.2
通讯作者：
Wang, Yan
中科院分区：
文献类型：
--
作者：
Ge, Wenjuan;Wu, Bo;Wang, Yan
采用机械合金化（MA）和真空热压烧结（VHPS）技术在T10基体上合成了CuZrAlTiNi高熵合金（HEA）涂层。 MA结果表明，研磨后的粉末的最终产物为非晶相。在950℃下烧结得到的涂层致密，厚度约为0.9毫米。它由一对面心立方（FCC）、一个体心立方（BCC）固溶体和AlNi2Zr相组成。通过三点弯曲试验测得涂层与基体界面强度为355.5 MPa。与T10基体相比，CuZrAlTiNi HEA涂层在海水溶液中的耐腐蚀性能大大增强，表现为更高的腐蚀电位、更宽的钝化区域和二次钝化。涂层的平均显微硬度达到943 HV0.2，比基体高约3.5倍，这主要归功于均匀分散的纳米级析出物、相界强化和固溶强化。而且，与基体相比，涂层的耐磨性略有提高。 (C) 2017 日本粉末技术协会。由 Elsevier B.V. 和日本粉末技术协会出版。版权所有。
CuZrAlTiNi High entropy alloy (HEA) coating was synthesized on T10 substrate using mechanical alloying (MA) and vacuum hot pressing sintering (VHPS) technique. The MA results show that the final product of as-milled powders is amorphous phase. The obtained coating sintered at 950 degrees C is compact and about 0.9 mm in thickness. It is composed of a couple of face-centered cubic (FCC), one body-centered cubic (BCC) solid solutions and AlNi2Zr phase. The interface strength between coating and substrate is 355.5 MPa measured by three point bending test. Compared with T10 substrate, the corrosion resistance of CuZrAlTiNi HEA coating is enhanced greatly in the seawater solution, which is indicated by the higher corrosion potential, wider passivation region, and secondary passivation. The average microhardness of the coating reaches 943 HV0.2, and is about 3.5 times higher than the substrate, which is mainly ascribed to the uniformly dispersed nano-size precipitates, phase boundary strengthening and solid solution strengthening. Moreover, the wear resistance of the coating is slightly improved in comparison with the substrate. (C) 2017 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.