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以TiH_2粉及雾化Ni粉为原料,采用凝胶注模成型技术,制备出Ni-Ti凝胶生坯,再通过真空干燥、脱脂以及烧结工艺制备出多孔Ni-Ti合金。运用XRD、SEM对多孔Ni-Ti合金进行了相成分及微观结构表征,分析了不同烧结温度对于多孔Ni-Ti合金孔隙率、力学性能、物相成分及微观形貌的影响。结果表明,随着烧结温度的增加,孔隙率降低,抗压强度和杨氏模量增加。对固相体积分数为45%的生坯,在1050℃下高真空烧结2 h,制备出孔隙率为42.65%,抗压强度为202.65 MPa,杨氏模量为17.14 GPa,主相为NiTi相的多孔Ni-Ti合金。基体满足人体骨性能需要。
TiH 2 powder and atomized Ni powder are used as raw materials, and a Ni-Ti gel green body is prepared by a gel injection molding technique. Porous Ni-Ti alloy is prepared by vacuum drying, degreasing and sintering. The phase composition and microstructure of porous Ni-Ti alloy were characterized by XRD and SEM. The effects of sintering temperature on porosity, mechanical properties, phase composition and microstructure of porous Ni-Ti alloy were analyzed. The results show that with the increase of sintering temperature, the porosity decreases and the compressive strength and Young’s modulus increase. For the green body with solid content of 45%, sintered at 1050 ℃ for 2 h in high vacuum, the porosity was 42.65%, the compressive strength was 202.65 MPa, the Young’s modulus was 17.14 GPa, the main phase was NiTi phase Of porous Ni-Ti alloy. Matrix to meet the needs of human bone performance.