Laser remelting of plasma sprayed thermal barrier coatings

J Mater Sci Technol ›› 2001, Vol. 17 ›› Issue (S1): 105-110.

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Laser remelting of plasma sprayed thermal barrier coatings

Gang ZHANG, Yong LIANG, Yingna WU, Zhongchao FENG, Bingchun ZHANG, Fangjun LIU

Institute of Metal Research, Chinese of Academy of Sciences, Shenyang 110016, China...

Received:2000-09-01 Revised:2000-11-20 Online:2001-10-28 Published:2009-10-10
Contact: Gang ZHANG

Abstract

Abstract: A CO2 continuous wave laser with defocused beam was used for remelting the surface of plasma sprayed ZrO2-8 Wt pct Y2O3 (8YSZ)/Ni22Cr10AlY thermal barrier coatings (TBCs) on GH536 superalloy substrate. Two main laser processing parameters, power and travel speed, were adopted to produce a completely remelted layer, and their effects on remelted appearance, remelting depth, density and diameter of depression, space of segment crack and remelted microstructure were evaluated. With energy of 4.0 to 8.0 J.mm(-2), an appropriate laser processing for applicable remelted layer was suggested.

Key words:

Gang ZHANG, Yong LIANG, Yingna WU, Zhongchao FENG, Bingchun ZHANG, Fangjun LIU. Laser remelting of plasma sprayed thermal barrier coatings[J]. J Mater Sci Technol, 2001, 17(S1): 105-110.

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Laser remelting of plasma sprayed thermal barrier coatings

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