Nanocrystalline CoCrFeNiCuAl high-entropy solid solution synthesized by mechanical alloying

被引：178

作者：

Zhang, K. B. ^{[1
]}

Fu, Z. Y. ^{[1
]}

Zhang, J. Y. ^{[1
]}

Shi, J. ^{[2
]}

Wang, W. M. ^{[1
]}

Wang, H. ^{[1
]}

Wang, Y. C. ^{[1
]}

Zhang, Q. J. ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Wuhan Univ, Coll Phys Sci & Technol, Wuhan 430072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 485卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Entropy; Mechanical alloying; Microstructure; Thermal analysis; MICROSTRUCTURE;

D O I：

10.1016/j.jallcom.2009.05.144

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：

The equiatomic multicomponent CoCrFeNiCuAl high-entropy solid solution alloy was synthesized by mechanical alloying (MA). The effects of milling duration and subsecuent annealing on the morphology and structure evolution were investigated. Supersaturated solid solution structure can be obtained when the blended powder is ball milled longer than 42 h. The 60 h ball milled alloy powder shows refined morphology and excellent chemical homogeneity. The 60 h ball milled powder exhibits mean particle size of less than 5 mu m, which are actually hard agglomerations of nanosized crystalline with crystal size of less than 50 nm. A BCC and a FCC solid solution structure phases appear when the 60 h mechanically alloyed powder was annealed at 600 degrees C for 1 h. which is attributed to phase precipitation of the metastable supersaturated solid solution. The simple solid solution structure can be maintained even after annealed at 1000 degrees C. (C) 2009 Elsevier B V All rights reserved

引用

页码：L31 / L34

页数：4

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