Thermal Shock Property of Al/Ni-ZrO2 Gradient Thermal Barrier Coatings
来源期刊：材料热处理学报2004年第5期
论文作者：WANG Quan-sheng ZHANG Wei-fang FAN Jin-juan
关键词：gradient thermal barrier coatings; one direction shock; finite element method;
摘 要：Al/Ni-ZrO2 gradient thermal barrier coatings are made on aluminum substrate using plasma spraying method and one direction thermal shock properties of the coatings are studied in this paper. The results show that pores in coatings link to form cracks vertical to coating surface. They go through the whole ZrO2 coating once vertical cracks form. When thermal shock cycles increase, horizontal cracks that result in coatings failure forms in the coatings and interface. And vertical cracks delay appearance of horizontal cracks and enhance thermal shock property of coatings. Failure mechanisms of coating thermal shock are discussed using experiments and finite element method.
WANG Quan-sheng1，ZHANG Wei-fang2，FAN Jin-juan2
(1.Department of material science and engineering, Beijing Institute of Technology, Beijing, China;
2.Failure Analysis Center of Beijing Institute of Aeronautical Materials, Beijing, China)
摘要:Al/Ni-ZrO2 gradient thermal barrier coatings are made on aluminum substrate using plasma spraying method and one direction thermal shock properties of the coatings are studied in this paper. The results show that pores in coatings link to form cracks vertical to coating surface. They go through the whole ZrO2 coating once vertical cracks form. When thermal shock cycles increase, horizontal cracks that result in coatings failure forms in the coatings and interface. And vertical cracks delay appearance of horizontal cracks and enhance thermal shock property of coatings. Failure mechanisms of coating thermal shock are discussed using experiments and finite element method.
关键词:gradient thermal barrier coatings; one direction shock; finite element method;
【全文内容正在添加中】
