Solid Solution or Intermetallics in a High-Entropy Alloy

被引:180
作者
Wang, Yan Ping [1 ]
Li, Bang Sheng [1 ,2 ]
Fu, Heng Zhi [1 ]
机构
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Micro Nano Technol Res Ctr, Harbin 150001, Peoples R China
关键词
MICROSTRUCTURE; ELEMENTS; SYSTEM; TI;
D O I
10.1002/adem.200900057
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
NiAl intermetallic phases were identified in AlCrFeCoNiCu alloy, indicating that the mixing entropy is not sufficient to inhibit the Al and Ni atoms from forming intermetallics in this alloy system. The AlCrFeCoNiCu alloy ingots were prepared by a vacuum arc melting the mixtures of pure Al, Cr, Fe, Co, Ni, and Cu with purities of better than 99.9 mass% in a Ti-gettered high-purity argon atmosphere. The ingots were remelted four times to improve homogeneity and then directly solidified in the cold copper hearth. A Hitachi S-5500 scanning electron microscope equipped with EDS was used to identify the element distribution of as-cast AlCrFeCoNiCu alloy in nanoscale. The AlCrFeCoNiCu alloy displays typical ferromagnetic behavior because of the decomposition of paramagnetic NiAl intermetallics and a magnetic solid solution. The ordered bcc phase was also detected in AlSiTiCrFeCoNiMo0.5 and AlSiTiCrFeCoNiMo0.5 alloys.
引用
收藏
页码:641 / 644
页数:4
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