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选用粒径为10~40μm的钛粉和粒径为100~375μm的碳酸氢铵,使用占位填料法制备多孔钛,在10-3Pa真空压力下进行烧结。研究了烧结温度、保温时间及升温速率对多孔钛微结构及力学性能的影响。结果表明:烧结温度1200℃、保温时间2 h、升温速率4.2 min/℃的条件下,多孔钛性能最佳,其孔隙率为63.5%,开孔率为64.9%,抗压强度为150.7 MPa,弹性模量为2.91 GPa;烧结温度和保温时间对性能影响较大而升温速率影响较小;多孔钛的抗压强度、弹性模量和人骨的抗压强度及弹性模量较为接近,可作为人骨的替代材料。
Titanium powder with particle size of 10-40μm and ammonium bicarbonate with particle size of 100-375μm were selected. Porous titanium was prepared by the space-filling method and sintered at 10-3Pa vacuum pressure. The effects of sintering temperature, holding time and heating rate on microstructure and mechanical properties of porous titanium were investigated. The results show that the porous titanium has the best performance under the conditions of sintering temperature of 1200 ℃, holding time of 2 h and heating rate of 4.2 min / ℃. The porosity is 63.5%, the porosity is 64.9%, the compressive strength is 150.7 MPa, The elastic modulus is 2.91 GPa. Sintering temperature and holding time have a great influence on the performance but little influence on heating rate. The compressive strength, elastic modulus and compressive strength and elastic modulus of porous titanium are close to each other, Alternative material.