Calcium phosphate deposition on the surface of porous TiNi alloys with different sintering temperatures in simulated body fluid

Abstract:

Near-Equiatomic TiNi alloys were successfully produced by powder metallurgy (P/M) method using Ti and Ni powders in different temperatures(950℃，1000℃，1050℃，1100℃).To obtain a material surface having excellent affinity to bone, hydroxyapatite coatings were conducted in a simulated body fluid (SBF). Phase composition and surface structure of Ca-P coatings were characterized by X-ray diffractometry (XRD), Scanning electron microscopy (SEM) and Energy dispersive X-ray spectroscopy (EDS) attached to SEM. Results indicated that porosity of TiNi alloys produced by P/M method is high and peaks of hydroxyapatite is sharp. In the same experimental condition, more apatite coatings formed on TiNi samples sintered at 1050℃ and 1100℃ due to their high porosity and pure TiNi phase that is beneficial to heterogeneous nucleation.