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.

引用

页数：8

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