Y-doped AlCoCrFeNi2.1 eutectic high-entropy alloy with excellent oxidation resistance and structure stability at 1000°C and 1100°C

被引:59
作者
Lu, Jie [1 ]
Zhang, Han [1 ]
Chen, Ying [2 ]
Ling, Li [1 ]
Liu, Xuanzhen [1 ]
Xiao, Weiwei [3 ]
Ni, Na [3 ]
Zhao, Xiaofeng [1 ]
Guo, Fangwei [1 ]
Xiao, Ping [1 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv High Temp Mat & Precis Formi, Shanghai 200240, Peoples R China
[2] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England
[3] Shanghai Jiao Tong Univ, Sch Mech Engn, Key Lab Educ Minist Power Machinery & Engn, Shanghai 200240, Peoples R China
基金
中国国家自然科学基金; 英国工程与自然科学研究理事会;
关键词
High-entropy alloy; Oxidation; Al(2)O(3)scale; High-temperature; COATINGS; BEHAVIOR; MECHANISMS; DIFFUSION; SIZE;
D O I
10.1016/j.corsci.2020.109191
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this study, the oxidation behavior of AlCoCrFeNi2.1 eutectic high entropy alloy (EHEA) with/without Y doping at 1000 degrees C and 1100 degrees C was reported. The doping of minor Y is crucial to improving the Al2O3 scale adhesion and achieving its durability at high temperatures. The oxidation rates of Y-doped AlCoCrFeNi2.1 EHEA at 1000 degrees C and 1100 degrees C are comparable and even lower compared with conventional Al2O3-forming NiCoCrAlY/CoNiCrAlY alloys. The superior oxidation resistance and highly stable eutectic lamellar structure after high-temperature oxidation make Y-doped AlCoCrFeNi2.1 EHEA show a tremendous potential in high-temperature application.
引用
收藏
页数:10
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