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采用钛网层叠烧结法制备出孔隙率为45%的多孔钛,研究酸洗处理、碱热处理、模拟体液浸泡中不同介质溶液对多孔钛表面微观结构和力学性能的影响规律。结果表明:酸洗处理在多孔钛表面形成“阶梯”型层状光滑表面,碱热处理在多孔钛表面形成微/纳米孔,模拟体液浸泡处理则在多孔钛表面形成均匀的羟基磷灰石涂层。在力学测试中,酸洗处理及碱热处理能显著地降低多孔钛的弹性模量,对于屈服强度则无显著影响;模拟体液浸泡处理则能显著提高多孔钛的杨氏模量和屈服强度。
Porous titanium with a porosity of 45% was prepared by the titanium mesh lamination sintering method. The effects of different media solutions on the microstructure and mechanical properties of porous titanium surface during pickling treatment, alkali heat treatment and simulated body fluid soaking were studied. The results show that the pickling treatment forms a “stepped” layered smooth surface on the surface of porous titanium, and the alkali heat treatment forms micro / nano-pores on the surface of the porous titanium. Simulated bodily liquid immersion treatment forms uniform hydroxyapatite on the porous titanium surface coating. In mechanics test, pickling treatment and alkali heat treatment can significantly reduce the elastic modulus of porous titanium, and have no significant effect on the yield strength; soaking simulated body fluid can significantly improve the Young’s modulus and yield strength of porous titanium.