关键词:
Ti6Al4V-based composite
Nb
simulated body fluid
laser deposition
passivation
microstructure
corrosion property
摘要:
Nb and Ti-13 Nb powders were used for improving the surface of Ti6Al4 V *** deposition of the powders was carried out at various laser *** scanning electron microscopy(SEM)-EDS and optical microscopy were used for characterization.X-ray diffractometer(XRD) was used for analyzing the elemental composition and phase *** hardness,wear and corrosion properties were *** corrosion and the wear behaviours of the deposited layers were studied in a Hanks solution(simulated body fluid,SBF).The microstructures of Nb coatings reveal the presence of orthorhombic,dendritic α″ and metastable β-Nb phases which produce uneven hardness with an average of HV *** Ti-13 Nb coatings,martensitic α′ and metastable β-Nb phases with an average hardness of HV 423 were *** resistance of wear on dry sliding of Ti-13 Nb coating is attributed to the increase in *** results indicate that deposition of Nb and Ti-13 Nb on Ti6Al4 V grossly reduces the mass fractions of Al and V in all *** SBF,Nb reinforcement produces the best coating that reveals the best wear and corrosion resistances as compared with the ***,this coating will perform best for orthopaedic implant material enhancement.