MgxTiAlFeNiCr (x=0.6~2.0)高熵合金微结构演变及耐蚀性

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斯庭智*，刘清华，徐文祥，丁晓丽

安徽工业大学材料科学与工程学院，安徽马鞍山 243002

收稿日期:2018-05-15修回日期:2018-07-03出版日期:2019-04-22发布日期:2019-04-18
通讯作者:斯庭智

基金资助:国家自然科学青年基金

Phase evolution and corrosion resistance of MgxTiAlFeNiCr (x=0.6~2.0) high-entropy alloys

Tingzhi SI*, Qinghua LIU, Wenxiang XU, Xiaoli DING

School of Materials Science and Engineering, Anhui University of Technology, Ma?anshan, Anhui 243002, China

Received:2018-05-15Revised:2018-07-03Online:2019-04-22Published:2019-04-18

摘要/Abstract

摘要： 通过机械合金化方法制备了轻质MgxTiAlFeNiCr(x=0.6?2.0)高熵合金，研究了Mg含量、热力学参数、合金相结构间的关系。结果表明，Mg在体心立方(BCC)相中的固溶度较大，x=0.6?1.4、合金的热力学参数原子半径错配度?=8.68%?9.77%、混合熵ΔSmix为14.78?14.82 J/(mol?K)，混合焓ΔHmix为–14.13?–6.76 kJ/mol时，合金为单相体心立方结构(BCC1)。x=1.6~1.8, ?=10.0%?10.1%, ΔSmix=14.65?14.74 J/(mol?K), ΔHmix=–5.40?–4.19 kJ/mol时，合金由两种体心立方结构BCC1和BCC2组成。BCC2相比BCC1相的Mg含量更高，两相界面为半共格关系。MgxTiAlFeNiCr合金在3.5wt% NaCl溶液中具有良好的耐腐蚀性能。但随Mg含量增加，合金的耐蚀性下降。

引用本文

斯庭智刘清华徐文祥丁晓丽. MgxTiAlFeNiCr (x=0.6~2.0)高熵合金微结构演变及耐蚀性[J]. 过程工程学报, 2019, 19(2): 393-399.
Tingzhi SI Qinghua LIU Wenxiang XU Xiaoli DING. Phase evolution and corrosion resistance of MgxTiAlFeNiCr (x=0.6~2.0) high-entropy alloys[J]. Chin. J. Process Eng., 2019, 19(2): 393-399.

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