Residual stress and fracture toughness of thick 8YSZ-Al2O3 composite coatings via a modified Vickers indentation method

被引：17

作者：

Dong, Kai ^{[1
]}

Lu, Fazhang ^{[2
]}

Huang, Wenzhi ^{[2
]}

Zhu, Ling ^{[1
]}

机构：

[1] Changsha Univ Sci & Technol, Sch Chem & Food Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China

[2] Natl Univ Def Technol, Coll Aerosp Sci & Engn, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Peoples R China

来源：

VACUUM | 2020年 / 177卷

关键词：

Ceramic; Residual stress; Simulation and modeling; Fracture toughness; Thick coatings; THERMAL BARRIER COATINGS;

D O I：

10.1016/j.vacuum.2020.109437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The aim of current study is to explore a modified Vickers indentation method for characterization of the residual stress and fracture toughness of thick 8YSZ-Al2O3 composite coatings. According to the results, the through thickness residual stress of coating with thickness of 870 mu m increased from -114.7 MPa to -368.3 MPa as the Al2O3 content varied from 10 wt% to 40 wt%, which was higher than that with thickness of 590 mu m. It was revealed that the increase of Al2O3 content and coating thickness resulted in accumulation of the compressive residual stress in these thick composite coatings. Simultaneously, the fracture toughness of coatings with different thicknesses also exhibited an increasing tendency with the increase of Al2O3 content.

引用

页数：4

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