Effects of Laser Parameters on the Formation of Al₂O₃-TiC Coating by Laser-Assisted Combustion

Abstract:

Nowadays, Al₂O₃-based ceramic coatings have attracted considerable attention for their potential applications as tritium permeation barrier (TPB) in the nuclear reactor. Herein, dense composite ceramic coatings (Al₂O₃-TiC) have been successfully fabricated by a facile laser-assisted combustion method. The precursor Al-TiO₂-C powder mixture underwent combustion synthesis at high temperatures generated by an incident laser, and Al₂O₃-TiC coatings were thus obtained. Their crystal structures and morphologies were monitored by x-ray diffraction and field emission scanning electron microscopy. The laser processing parameters, including laser power and laser scanning speed, have been found to play an important role in the microstructure of the products. The optimal laser processing parameters for obtaining Al₂O₃-TiC coating were 4kW in laser power and 6mm/s in laser scanning speed. The results in this paper may be beneficial to the future study of other coatings fabricated by laser-assisted combustion.

• Periodical: Applied Mechanics and Materials (Volume 597)
• Pages: 175-183
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.597.175
• Online since: July 2014
• Authors: Cai Xuan Lu, He Ping Li*, Peng Chen, Li Hong Xue, You Wei Yan
• Keywords: Alumina, Ceramic Matrix Composites, Coating, Composite, Titanium Carbide

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