Synthesis of TiC/Co Composite Powder by Carbothermal Reduction of Ti-Co-O Based Oxide Powder

摘要

In the present, the focus is on the synthesis of ultra fined TiC/Co composite powder by the carbothermal reduction process using titanium-cobalt-oxygen based oxide powder. The titanium-cobalt-oxygen based oxide powder prepared by the combination of the spray drying and desalting methods. The prepared oxide powder has a mixed phase structure of TiO_2 and CoTiO_3. The titanium-cobalt-oxygen based oxide powder carbothermally reduced to the titanium carbide/cobalt composite powder through three steps of carbothermal reduction steps with increasing temperature; reduction of CoTiO_3, reduction of TiO_2 and formation of titanium carbide. The synthesized TiC-15wt.%Co composite powder at 1200℃ for 2 hours had an average particle size of 200 nm.