A novel in-situ Al2O3@TiC@TiB multilayer core–shell ceramic particle reinforced Fe-based composite coating by laser cladding

A novel Al2O3@TiC@TiB multilayer core–shell ceramic particle was in-situ synthesized in the Fe-based composite coating by laser cladding. The ceramic particle was formed by the addition of trace Al2O3 particles. The core of the multilayer ceramic particle was spherical α-Al2O3, the inner shell and outer shell of the particle was TiC and TiB, respectively. The Al2O3@TiC@TiB particle was uniformly distributed in the coating. The hardness and wear rate of the Al2O3-added coatings were 1277.7HV and 0.006 g/h, respectively. Compared with the coatings without the addition of Al2O3, the hardness was improved approximately 32 % and the wear resistance was enhanced by approximately 50 %. This study provides a promising novel multilayer core–shell ceramic particle reinforcement for composite coatings fabricated by laser cladding.

Duke Scholars

Author Zhaohui Wang Pathology