Title： The opportunities and challenges when additive manufacturing meets materials science

Time：Sep 21,2020 8:30-10:30

Speaker: QIU Dong

Host: Wang Cheng

Location：Dingding，ID:455716881

Abstract：

Surface modification of titanium-based implants is considered a highly effective solution to enhance osseointegration. This study describes a novel Ti/hydroxyapatite (HA) composite porous coating produced using a cold spraying technique followed by alkaline leaching and sintering. Experimental results indicate desirable open-cell structure with 50–150 mm pore size and 60–65% macroporosity. In particular, the reinforced HA particles are exposed to the surface of the coating resulting in enhanced mineralization ability in simulated body fluid. None of the coatings displayed a cytotoxic response in SaOS-2 cells cultured in vitro for up to 48 h. The bond strength between the porous coating and the Ti substrate was found to be 20 MPa. These properties are comparative to or better than products currently on the market and thus this novel coating has potential use in orthopedics.