Ceramic coating and laser treatment

Tao Wang; Qiguang Zheng; Xingzhi Tao; Guqien Hue; Zaiguang Li

doi:10.1117/12.184710

7 September 1994 Ceramic coating and laser treatment

Tao Wang, Qiguang Zheng, Xingzhi Tao, Guqien Hue, Zaiguang Li

Proceedings Volume 2207, Laser Materials Processing: Industrial and Microelectronics Applications; (1994) https://doi.org/10.1117/12.184710
Event: Europto High Power Lasers and Laser Applications V, 1994, Vienna, Austria

Abstract

The most important problems to be solved lie in the generation of thermal stresses and the subsequent spalling of the coating. Now the method for improving the coating quality is to remelt the coating using a laser beam. This method can reduce the porosity and stresses and achieve proper microstructure and homogeneity. The Ni-Cr alloys were plasma sprayed onto A₃ steel substrates as bond coat with a layer of 50 approximately 100 micrometers thick. Alumina and/or zircoia powders were plasma sprayed onto the bond coat led to a 100 approximately 150 micrometers thick surface layer. The surfaces of the laser-treated coatings and prepared cross-sections were observed by optical microscopy and scanning electron microscopy. The relation between surface status of ceramic and laser process was discussed. The element permeability in ceramic coating and in bond coatings were discussed also.

Citation Download Citation

Tao Wang, Qiguang Zheng, Xingzhi Tao, Guqien Hue, and Zaiguang Li "Ceramic coating and laser treatment", Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); https://doi.org/10.1117/12.184710

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