Microstructure and Properties of TiC Coating by Vibrating Electrospark Deposition
Protective TiC coating was produced on Cr-Zr-Cu electrode by vibrating electrospark deposition. Microstructure of the functional coating with pre-treatment (clean) and post-treatment (diffusion) were tested respectively. The deposition parameters on the structure of the substrate is discussed. The results indicate that as-deposited substrate consists of four layers. There are many micro-porous and micro-cracks in transition layer where mutual diffusion of Ti and Cu occurs, which provides atomic bonding between the coating and the substrate. Pre-treatment modifies the coating structure with small influence on its hardness whereas post-treatment modifies it and reduces its hardness and thickness. The service time of the specimens with TiC coating 2.4 times exceeds that of the uncoated ones.
M.K. Lei, X.P. Zhu, K.W. Xu and B.S. Xu
C. Luo et al., "Microstructure and Properties of TiC Coating by Vibrating Electrospark Deposition", Key Engineering Materials, Vols. 373-374, pp. 180-183, 2008