Research progress of titanium hydroxyapatite biocomposites by powder metallurgy
Titanium and titanium alloys have been widely studied and applied as biomedical metal materials.In or-der to better satisfy the requirements of low elastic modulus,biological activity after implantation in human body,the preparation of titanium based hydroxyapatite(HA)biological composites by adding hydroxyapatite with pow-der metallurgy has become a research hotspot.Based on the basic properties and existing problems of titanium and titanium alloys,this paper summarizes the research progress of titanium based HA biological composites by pow-der metallurgy such as hot pressing,powder injection molding,spark plasma sintering from the aspects of prepar-ing biological composites to reduce elastic modulus,improve biological activity and corrosion resistance.The rep-resentative cases were listed separately which were preparation for titanium hydroxyapatite biocomposites by syn-thesis of α type,α+β type and β type titanium alloy with HA.Moreover,the challenges faced and suggestions for the development direction are also proposed.
titanium and titanium alloyhydroxyapatiteelastic modulusbiological activitycorrosion resistance
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