Investigation of breakaway oxidation kinetics of nickel-base single crystal superalloys: Modeling and experiments

被引：3
作者：
Sun, Xiaoyu [1 ,2 ]
Zhang, Longfei [1 ,2 ]
Pan, Yanming [1 ,2 ]
Huang, Zaiwang [1 ,2 ]
Jiang, Liang [3 ]
机构：
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[2] Cent South Univ, Powder Met Res Inst, Changsha 410083, Hunan, Peoples R China
[3] Yantai Univ, Inst Adv Studies Precis Mat, Yantai 264005, Shandong, Peoples R China
来源：
MATERIALS TODAY COMMUNICATIONS | 2022年 / 32卷
关键词：
Breakaway oxidation; Spalling model; Kinetics; Superalloys; STAINLESS-STEEL; DEGREES-C; BEHAVIOR; OXIDE; TEMPERATURE; TRANSITION; PRESSURE; GROWTH;
D O I：
10.1016/j.mtcomm.2022.103893
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Varied oxidation behaviors at 1100 degrees C were investigated in six nickel-base single crystal superalloys. Thereinto, breakaway oxidation shows a feature of continuously increased oxidation rate, contrary to the typical parabolic theory. Predicated on parabolic oxide-layer growth and a constant spalling area fraction, we proposed a kinetics model to simulate the iterative scale growth and spallation process on the surface of superalloys. Our findings revealed that the breakaway oxidation behavior corresponds to accelerated weight-gain rate and is mechanistically attributed to continuous spallation of oxide layers. Based on our and previous research, a typical isothermal oxidation process can be defined as four stages: initial linear stage, parabolic stage, accelerated oxidation stage and dynamic-balance stage.
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页数：8
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