|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Materials in Dental and Orthopedic Applications
||Surface Amorphization of NiTi Alloy Induced by Ultrasonic Nanocrystal Surface Modification for Biomedical Applications
||Xiaoning Hou, Ruixia Zhang, Yalin Dong, Chang Ye
|On-Site Speaker (Planned)
Due to their good biocompatibility, NiTi alloys are widely used as orthopedic implants. In this study, an innovative surface processing technique, Ultrasonic Nanocrystal Surface Modification (UNSM), is investigated with an objective to improve the mechanical properties of a NiTi alloy. UNSM utilizes low amplitude ultrasonic frequency vibrations superimposed on a static load to induce plastic deformation on NiTi surface, which causes surface amorphization and subsurface grain refinement. Due to the surface amorphization and grain refinement, the in-depth hardness of the NiTi alloy has been significantly improved, which leads to higher wear resistance compared to non-process samples. Cell culture results demonstrated that UNSM processing did not deteriorate the biocompatibility compared to the non-processed samples. Taken together, the results demonstrated that UNSM processing can significantly improve mechanical properties without compromising biocompatibility, and would contribute significantly towards the efficient and rational design of future implant materials for bone tissue engineering.
||Planned: A print-only volume