Research on laser remelting of plasma sprayed thermal barrier coatings

Zhang Gang; Wu Yingna; Liang Yong; Feng Zhongchao; Ba Ruizhang

Zhang Gang, Wu Yingna, Liang Yong, Feng Zhongchao, Ba Ruizhang. Research on laser remelting of plasma sprayed thermal barrier coatings[J]. LASER TECHNOLOGY, 2002, 26(5): 334-337.

Citation:

Zhang Gang, Wu Yingna, Liang Yong, Feng Zhongchao, Ba Ruizhang. Research on laser remelting of plasma sprayed thermal barrier coatings[J]. LASER TECHNOLOGY, 2002, 26(5): 334-337.

Citation:

Zhang Gang, Wu Yingna, Liang Yong, Feng Zhongchao, Ba Ruizhang. Research on laser remelting of plasma sprayed thermal barrier coatings[J]. LASER TECHNOLOGY, 2002, 26(5): 334-337.

Research on laser remelting of plasma sprayed thermal barrier coatings

Graphical Abstract

Graphical Abstract

Abstract

Abstract

A CO2 continuous wave laser with defocused beam is used for laser remelting (LR) the surface of plasma sprayed (PS) thermal barrier coatings (TBCs) on GH536 superalloy substrate. The thermal shock tests are conducted to both PS samples and LR samples. With the different failure criterions,the mechanism of failure is discussed. It is indicated that the higher laser energy input is harmful for thermal shock lifetime of LR TBCs. The thin remelted thickness and improved laser beam quality are suggested for laser plasma compound preparation of TBCs.