Microstructure of advanced TiC-Based coatings prepared by laser cladding

The specific advantages of TiC as a hard material are its low density, high hardness, and its high alloyability in metal matrix composites. Agglomerated and sintered core-rim structured TiC-based powders were intensively studied in the last few years for thermal spray coating solutions. In the work described in this paper a powder with cubic (Ti,Mo)(C,N) hard phases and Co binder were used together with mechanically mixed NiBSi and CoCrMo powders to produce wear resistant coatings by laser cladding. Coatings with fine-grained hard particles were obtained. Basic process parameters and coating microstructures are described.