Laser surface alloying of pure titanium with TiN-B-Si-Ni mixed powders

Laser alloying was carried out on the surface of pure titanium substrate with TiN-B-Si-Ni mixed powders. The result of X-ray diffraction (XRD) analysis shows that the alloyed layer consists of many kinds of intermetallic compounds. The test results show that the alloyed layers have high microhardness (1500-1600 HV0.1), low friction coefficient (about 0.4), and are more resistant to oxidation than untreated substrate.