Sintering governing the cracking behaviors of different La2Zr2O7/YSZ ceramic layer combination TBCs at 1150 ◦C
Bo Cheng1,2; Yu Wang1; Xin Zhang1; Guosheng An1; Qianqian Chu1; Xinjian Zhang1; Dongqing He1; Haimin Zhai1; Wensheng Li1
2021-11-15
Source PublicationSurface & Coatings Technology
Volume428Pages:127910
Abstract

Sintering behavior is one of the most important indicators correlated to the service behaviors for thermal barrier coatings (TBCs). 5 different La2Zr2O7(LZO)/YSZ double ceramic layer (DCL) combination TBCs are subjected to gradient thermal cyclic tests under the surface temperature of 1150C, aiming to elucidate the service behaviors of the DCL TBCs under relative low temperature. The failure of DCL TBCs is the cracking of top coat along in-plane direction, the 8YSZ TBCs showed an vertical cracking after 2200 cycles, and the stress state transferred from tensile about 250 MPa to compressive of − 60 MPa. The pure 8YSZ is superior to the DCL TBCs for the long-term application at relative low temperature. Sintering induced the competition of cracking driving force and resistance dominates the cracking of TBCs, the formation of vertical cracks released the stress of the 8Y TBCs system to a large extent and the lifetime was extended.

KeywordThermal barrier coatings Double ceramic layer Cracking Sintering Lifetime
MOST Discipline Catalogue工学::材料科学与工程(可授工学、理学学位)
DOIhttps://doi.org/10.1016/j.surfcoat.2021.127910
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/149455
Collection省部共建有色金属先进加工与再利用国家重点实验室
材料科学与工程学院
能源与动力工程学院
Corresponding AuthorBo Cheng; Wensheng Li
Affiliation1.Lanzhou University of Technology
2.Xi'an Jiaotong University
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
GB/T 7714
Bo Cheng,Yu Wang,Xin Zhang,et al. Sintering governing the cracking behaviors of different La2Zr2O7/YSZ ceramic layer combination TBCs at 1150 ◦C[J]. Surface & Coatings Technology,2021,428:127910.
APA Bo Cheng.,Yu Wang.,Xin Zhang.,Guosheng An.,Qianqian Chu.,...&Wensheng Li.(2021).Sintering governing the cracking behaviors of different La2Zr2O7/YSZ ceramic layer combination TBCs at 1150 ◦C.Surface & Coatings Technology,428,127910.
MLA Bo Cheng,et al."Sintering governing the cracking behaviors of different La2Zr2O7/YSZ ceramic layer combination TBCs at 1150 ◦C".Surface & Coatings Technology 428(2021):127910.
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