Microstructure characterization of AlxCo1Cr1Cu1Fe1Ni1 (x=0 and 2.5) high-entropy alloy films

被引：74
|
作者：
Wu, Z. F. [1 ,2 ]
Wang, X. D. [1 ,2 ]
Cao, Q. P. [1 ,2 ]
Zhao, G. H. [1 ,2 ]
Li, J. X. [1 ,2 ]
Zhang, D. X. [3 ]
Zhu, Jian-Jun [4 ]
Jiang, J. Z. [1 ,2 ]
机构：
[1] Zhejiang Univ, ICNSM, Lab New Structured Mat, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
[3] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China
[4] Zhejiang Phillips Vehicle Ind Co LTD, Jiaxin, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 609卷
基金：
中国国家自然科学基金;
关键词：
High-entropy alloy films; Vapor deposition; Microstructure; Hardness; Reduced Young's modulus; MECHANICAL-PROPERTIES; BEHAVIOR; SYSTEM; GLASS;
D O I：
10.1016/j.jallcom.2014.04.094
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Co20Cr20Cu20Fe20Ni20 (at.%) (Al-0) and Al33.35Co13.33Cr13.33Cu13.33Fe13.33Ni13.33 (at.%) (Al-2.5) high-entropy alloy films with thicknesses less than 500 nm were successfully fabricated by sputter technique using alloy targets. Their microstructures are characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectrometer, transmission electron microscopy and nanoindentation techniques. It is found that compositions for both films are uniformly in depth. The both as-deposited films are composed of nanometer-sized grains with serious lattice distortion. The as-deposited Al-2.5 film, having a hardness of 15.4 GPa and reduced Young's modulus of 203.8 GPa, exhibits a body-centered cubic structure and remains stable up to 873 K for 20 min whereas the as-deposited Al-0 film, having a hardness of 6.3 GPa and reduced Young's modulus of 87.9 GPa, exhibits a face-centered cubic structure and remains up to 773 K for 20 min. It seems that due to high temperature structure stability and high hardness, the Al-2.5 film could be used as a potential coating material on high-temperature Ni-based alloys. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：137 / 142
页数：6
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