期刊
INTERMETALLICS
卷 19, 期 8, 页码 1130-1135出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2011.03.017
关键词
phase identification; coatings; rapid solidification; processing
资金
- Anhui University of technology
A high-entropy alloy (HEA) coating with the composition of FeCoNiCrAl2Si was prepared under laser-induced rapid solidification condition. The difference of atomic radius between Si (1.11 angstrom) and Al (1.43 angstrom) elements increases the atomic packing density. The coating has high microhardness (900 HV0.5) and electrical resisitivity (265 mu Omega mm) with simple supersaturated ordered and disordered body-centered cubic (BCC) structure. Besides the thermodynamic reason of high-entropy effect on the phase selection in the coating, the calculated incubation times of the nucleation for various competing phases during solidification indicate that the high cooling rate also plays a key role on preventing precipitation of intermetallic compounds. (C) 2011 Elsevier Ltd. All rights reserved.
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