Synthesis of titanium carbosilicides in Ti-Si and Ti-Si-Cu systems under mechanical alloying of elemental powders in liquid hydrocarbon

The paper studies synthesis of titanium carbosilicides in Ti-Si and Ti-Si-Cu systems under mechanical alloying of elemental powders of Ti, Si and Cu in a liquid hydrocarbon and subsequent annealing at 900 and 1300 degrees C. It has been shown that mechanical alloying of Ti-Si system facilitates the formation of Ti5Si3Cx carbosilicide as well as Ti(C,H) carbohydride which further transforms into TiC under annealing. The MAX phase Ti3SiC2 is formed in a small amount only after annealing. In addition to Ti5Si3Cx and TiC, a phase in amount of similar to 40 vol% is formed in the Ti-Si-Cu system after annealing, with the structure of Fd (3) over barm type and a lattice parameter of 11.12-11.13 angstrom, being an oxide or oxycarbide of the Ti-Cu-Fe system.