Influence of substrate temperature on microcracks formation in plasma-sprayed yttria-stabilized zirconia splats

被引：20

作者：

Xing, Ya-Zhe ^{[1
]}

Li, Yong ^{[1
]}

Li, Chang-Jiu ^{[1
]}

Li, Cheng-Xin ^{[1
]}

Yang, Guan-Jun ^{[1
]}

机构：

[1] Xian Jiaotong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

SURFACE ENGINEERING (ICSE 2007) | 2008年 / 373-374卷

关键词：

plasma spraying; yttria stabilized zirconia; substrate temperature; vertical cracks;

D O I：

10.4028/www.scientific.net/KEM.373-374.69

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

YSZ molten droplets created by plasma spraying were deposited on the YSZ substrate preheated to different temperature from 75 degrees C to 1000 degrees C. The results showed that there is little change in crack spacing when substrate temperature is less than about 740 degrees C, and a significant increase in crack spacing from 3.54 gm at 740 degrees C to 10.91 mu m at 1000 degrees C was observed. A simple qualitative model was proposed on the basis of the origin of thermal stresses to explain the influence of substrate initial temperature on crack density characterized by crack spacing. The analysis indicates that the results can be ascribed to the changes in tensile stress and splat/substrate adhesion resulting from changes of substrate initial temperature.

引用

页码：69 / 72

页数：4

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