采用大气等离子喷涂技术,在Ti-6A1-4V基体上制备了钙镁橄榄石涂层,研究了热处理对涂层组织结构及结合强度的影响,并对此材料作了体外模拟液浸泡及细胞共培养试验.结果表明,热处理前涂层的结晶度较低,热处理(400～900℃)能有效降低涂层的孔隙率、提高涂层的结合强度.在700℃下热处理后,涂层具有最低的孔隙率,结晶度较高,组织比较均匀,膨胀系数与基体材料接近,因而具有最高的结合强度(达到37 MPa)和很好的稳定性.此涂层在模拟体液中浸泡7 d后表面明显有磷灰石出现.成骨细胞在材料表面的贴壁试验说明,细胞在材料表面生长旺盛,表明该涂层具有很好的生物相容性.
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