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利用放电等离子烧结技术(SPS)制备了Ti-24Nb-4Zr-8Sn合金,研究了烧结温度对合金相对密度、显微组织及力学性能的影响。结果表明:在1000~1200℃烧结温度范围内合金具有较高的相对密度和抗压强度,合金主要由β-Ti相和Ti-Nb固溶体组成的混合基体及少量α-Ti相组成;随着烧结温度的升高,合金相对密度和抗压强度呈增大趋势,合金中α-Ti相向β-Ti相逐渐转变,同时合金中Ti-Nb固溶体含量越来越少,且尺寸减小;合金压缩弹性模量在58~61 GPa之间,受烧结温度变化影响较小。
Ti-24Nb-4Zr-8Sn alloy was prepared by spark plasma sintering (SPS). The effects of sintering temperature on the relative density, microstructure and mechanical properties of the alloy were investigated. The results show that the alloy has high relative density and compressive strength at the sintering temperature of 1000-1200 ℃. The alloy consists of a mixed matrix of β-Ti phase and Ti-Nb solid solution and a small amount of α-Ti phase. With the increase of The relative density and compressive strength of the alloy increase with increasing sintering temperature. The α-Ti phase changes gradually toward the β-Ti phase in the alloy, while the content of Ti-Nb solid solution decreases and the size decreases. The alloy The compressive elastic modulus is between 58 and 61 GPa, which is less affected by the sintering temperature.