Isothermal Oxidation Behavior of Supersonic Atmospheric Plasma-Sprayed Thermal Barrier Coating System

被引：41
作者：
Bai, Yu [1 ,2 ]
Ding, Chunhua [3 ]
Li, Hongqiang [1 ]
Han, Zhihai [1 ]
Ding, Bingjun [1 ]
Wang, Tiejun [3 ]
Yu, Lie [2 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R China
[3] Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Peoples R China
来源：
JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2013年 / 22卷 / 07期
基金：
中国博士后科学基金;
关键词：
Al2O3 layer stability; isothermal oxidation; supersonic atmospheric plasma spraying; thermal barrier coating; thermally grown oxides; BOND-COAT; MECHANICAL-PROPERTIES; CYCLIC OXIDATION; EB-PVD; GROWTH; FAILURE; MICROSTRUCTURE; PREOXIDATION; DEPLETION; ALUMINUM;
D O I：
10.1007/s11666-013-9979-7
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, Y2O3 stabilized zirconia-based thermal barrier coatings (TBCs) were deposited by conventional atmospheric plasma spraying (APS) and high efficiency supersonic atmospheric plasma spraying (SAPS), respectively. The effect of Al2O3 layer stability on the isothermal growth behavior of thermally grown oxides (TGOs) was studied. The results revealed that the Al2O3 layer experienced a three-stage change process, i.e., (1) instantaneous growth stage, (2) steady-state growth stage, and (3) depletion stage. The thickness of Al2O3 scale was proved to be an important factor for the growth rate of TGOs. The SAPS-TBCs exhibited a higher Al2O3 stability and better oxidation resistance as compared with the APS-TBCs. Additionally, it was found that inner oxides, especially nucleated on the top of the crest, continually grew and swallowed the previously formed Al2O3 layer, leading to the granulation and disappearance of continuous Al2O3 scale, which was finally replaced by the mixed oxides and spinel.
引用
收藏
页码：1201 / 1209
页数：9
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