2015 Volume 52 Issue 2 Pages 62-67
The purpose of the present study is to develop a novel implant material which has a superior biocompatibilities and high strength by means of a coating technology.In this study,the cold spray technique was selected and used as surface modification method of a titanium alloy for the development of implant material;the porous pure titanium coating was sprayed on a titanium alloy,Ti-6Al-4V,by using the cold spray technique.The influences of spray conditions and post-sprayed heat treatments on the mechanical properties of the cold sprayed biomedical coatings were investigated.It was revealed from the experimental results that the developed biomedical titanium coatings had a low elastic modulus,high adhesion and enough tensile strength.Most important factor to get the superior biomedical coatings was the post-spray heat treatment because both the adhesion and cohesion strengths of the coatings could be improved significantly due to the post-spray heat treatment.It was also revealed that both the adhesion and cohesion strengths were improved by the recrystallization of nanoparticles generated by the high speed collision of particle during the cold spray process.The cold sprayed biomedical coatings developed in this work have enough fatigue properties.
