钛基生物医学材料瞬态电能表面改性初探

钛基生物医学材料广泛应用于人体硬组织的修复,但耐磨性较差,限制了其更广泛的应用.采用瞬态电能强化技术以石墨为电极对钛合金TC4进行表面改性,对比研究了在空气、氩气和氮气气氛下获得的强化层的性能,并对氮气中制备的强化层的生物相容性进行了评价.结果表明,强化改性层物相主要为TiC及石墨相,表面硬度有较大提高,摩擦学性能获得显著改善,改性层与基体相比仍具有优异的耐蚀性能;氩气和氮气气氛下获得的强化层表面裂纹比空气气氛下的少;氮气保护下可得到裂纹较少、具有一定粗糙度、耐磨、生物相容性好且与基体为冶金结合的强化层.

Primary Investigation on Surface Modification of Titanium-Based Biomedical Materials Strengthened by Transient Electric Energy

Titanium-based biomedical materials were widelv used for pros-thesis of human hard tissue.However,its clinical use was limitedby poor wear resistance.Thus transient discharge technology wasused to strengthen the surface of Ti alloy TC4,where graphiteelectrode was employed.The properties of the strengthened layerprepared under air,argon and nitrogen gas were examined,andthe bio-compatibility of the modified surface prepared under nitro-gen gas was evaluated.Results show that the surface modificationleads to ...