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以钛粉和羟基磷灰石(HA)为原料,采用粉末冶金法制备了生物医用钛基复合材料,研究了烧结温度(1 200、1 300、1 400℃)对其显微组织、物相变化、致密化及抗压强度的影响。结果表明:合适的烧结温度可以使复合材料具有优良的显微组织及力学性能。当烧结温度为1 200℃时,HA已经发生分解并反应,且材料组织疏松;随着烧结温度升高,试样变得致密且显微组织粗大,同时生成TiP及CaTi_4(PO_4)_6等脆性相,其抗压强度反而降低。
Titanium powder and hydroxyapatite (HA) were used as raw materials to prepare biomedical titanium matrix composites by powder metallurgy. The effects of sintering temperature (1 200, 1 300 and 1 400 ℃) on microstructure, Changes, densification and compressive strength. The results show that the suitable sintering temperature can make the composites have excellent microstructure and mechanical properties. When the sintering temperature is 1200 ℃, HA decomposes and reacts, and the material structure is loosened. With the increase of sintering temperature, the sample becomes dense and the microstructure is coarse, meanwhile, the brittleness of TiP and CaTi_4 (PO_4) _6 Phase, the compressive strength but lower.