The role of the surface morphology and segmented cracks on the damage forms of laser re-melted thermal barrier coatings in presence of a molten salt (Na2SO4 +V2O5)

被引：61

作者：

Fan, Zhengjie ^{[1
]}

Wang, Kedian ^{[1
]}

Dong, Xia ^{[1
]}

Wang, Rujia ^{[1
]}

Duan, Wenqiang ^{[1
]}

Mei, Xuesong ^{[1
]}

Wang, Wenjun ^{[1
]}

Cui, Jianlei ^{[1
]}

Zhang, Shuai ^{[1
]}

Xu, Chengying ^{[2
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China

[2] Univ Cent Florida, Dept Mech Mat & Aerosp Engn, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA

来源：

CORROSION SCIENCE | 2017年 / 115卷

基金：

中国国家自然科学基金;

关键词：

Ceramic; Molten salts; High temperature corrosion; Intergranular corrosion; Oxidation; HOT CORROSION BEHAVIOR; ULTRASONIC VIBRATION; ZIRCONIA COATINGS; RESISTANCE;

D O I：

10.1016/j.corsci.2016.11.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hot corrosion behaviour of yttria-stabilized zirconia thermal barrier coatings (TBCs) with various segmented cracks and surface morphologies, obtained using ultrasonic-assisted laser re-melting, was investigated during exposure to Na2SO4 +V2O5 salt at 1100 degrees C. It is demonstrated, that the damage types of TBCs were significantly affected by segmented cracks and surface morphology. Four main damage mechanisms: (i) chemical reaction, (ii) Coefficient thermal mismatch stress, (iii) oxidation of bond coating and (iv) intergranular corrosion, based on the observed transport behaviour of oxygen and molten salt, stress-tolerance and self-healing of various segmented cracks, were discussed to account for the failure behaviour. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：56 / 67

页数：12

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