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Proceedings Paper

Ceramic coating and laser treatment
Author(s): Tao Wang; Qiguang Zheng; Xingzhi Tao; Guqien Hue; Zaiguang Li
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Paper 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.

Paper Details

Date Published: 7 September 1994
PDF: 6 pages
Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); doi: 10.1117/12.184710
Show Author Affiliations
Tao Wang, Huazhong Univ. of Science and Technology (China)
Qiguang Zheng, Huazhong Univ. of Science and Technology (China)
Xingzhi Tao, Huazhong Univ. of Science and Technology (China)
Guqien Hue, Huazhong Univ. of Science and Technology (China)
Zaiguang Li, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 2207:
Laser Materials Processing: Industrial and Microelectronics Applications
Eckhard Beyer; Maichi Cantello; Aldo V. La Rocca; Lucien Diego Laude; Flemming O. Olsen; Gerd Sepold, Editor(s)

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