Effect of Ta2O5-Y2O3 Dopants on Phase Structure, Fracture Toughness and Thermophysical Properties of Zirconia

被引：0

作者：

Chen Dong ^{[1
]}

Wang Quansheng ^{[1
]}

Liu Yanbo ^{[1
]}

Ning Xianjin ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2021年 / 50卷 / 06期

关键词：

thermal barrier coatings; phase stability; fracture toughness; thermo-physical properties; YTTRIA-STABILIZED ZIRCONIA; THERMAL BARRIER COATINGS; MECHANICAL-PROPERTIES; PROGRESS UPDATE; TRANSFORMATION; CONDUCTIVITY; ZRO2; YSZ;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A broad range of Ta2O5-Y2O3 doped ZrO2 (TYSZ) compounds were synthesized. The effects of dopant content on phase structure, phase stability, fracture toughness, coefficient of thermal expansion (CTE), and thermal conductivity were investigated. The TYSZ response mechanism under stress conditions was also explored. Result suggests that the lattice distortion caused by Ta2O5 and Y2O3 doping favors t phase stabilization. However, as the doping content increases, the high-temperature stability and fracture toughness decrease due to the suppressed stress-induced phase transformation and precipitation. The variation in CTE and thermal conductivity is due to the chaotic and expansive crystal structure. The 16TYSZ might be the potential candidate for advanced thermal barrier coating materials for its good phase stability, stress-sensitive phase transferability, and thermophysical properties.

引用

页码：1890 / 1895

页数：6

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