Wear resistance of Ti₅Si₃/niti biphase intermetallic compound alloy by laser melting deposition

Biphase intermetallic compound wear-resistant alloy was prepared by laser melting deposition technique with bulk silicide Ti₅Si₃ as primary phase and with Ti₅Si₃/NiTi eutectic as substrate. The wear resistance of Ti₅Si₃/NiTi alloy was tested under dry sliding wearing condition at room temperature and the worn mechanism was discussed. Results show that the Ti₅Si₃/NiTi alloy has excellent wear resistance and extremely low load-sensitivity under dry sliding wearing conditions, which is attributed to the good match between the toughness and the strength as well as the protection for the alloy from the formation of microstructurally featureless layer with high hardness on the worn surface of the alloy.