Product Code: JLA_18_2_113

Authors:
Y. X. Li
J. D. Hu
S. Y. Liu
H. Y. Wang
Y. Yang
Z. X. Guo
The Key Lab of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, No. 142 Renmin Street, Changchun 130025, People’s Republic of China

Laser ignited self-propagating high-temperature synthesis (LISHS) was used to fabricate TiC powders. The raw powders are Ti, Al, and C powders, respectively. A pulsed Nd-yttrium–aluminum–garnet laser was used to ignite reaction in argon atmosphere. The effects of Al content and laser average energy on density, phase composition, microstructure of the reaction products, and particle size and substoichiometry of the synthesized TiC were studied. The results indicated that TiC powders with particle size ranging from 1.0 to 4.0 μm could be made by this method. TiC particulates gradually transformed from the multiangular shape to the spherical shape as laser average energy increased. Nonequilibrium TiC_x was formed by LISHS reaction. The substoichiometry of the synthesized TiC_x (x=0.62,0.70) was related to Al content. The density of the sintered products was smaller than that of green densities, but sintered densities increased with the increase of Al content.