Research on laser remelting of plasma sprayed thermal barrier coatings

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

LASER TECHNOLOGY > 2002 > 26(5): 334-337.

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.

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Research on laser remelting of plasma sprayed thermal barrier coatings

1.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016;
2.
Shenyang Institute of Technology, School of Material Science and Engineering, Shenyang, 110015;
3.
Key Laboratory for High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing, 100024

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Received Date: September 10, 2001
Revised Date: November 29, 2001
Published Date: September 24, 2002

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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.
- laser remelting,
- thermal barrier coatings,
- plasma spraying,
- thermal shock test

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References

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