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利用放电等离子烧结技术(SPS)制备了Ti-35Nb-7Zr-5Ta合金,研究了烧结温度对合金致密度、显微组织及力学性能的影响。结果表明:在950~1150℃烧结温度范围内合金主要由β-Ti相和Ti-Nb-Ta-Zr固溶体组成的混合基体及少量未熔化的Nb、Ta金属颗粒组成,并且合金具有较高的致密度和抗压强度;随着烧结温度的升高,合金中混合基体组织尺寸越来越大且不断融合联结,Nb、Ta金属颗粒数量越来越少且尺寸越来越小,同时合金致密度和抗压强度呈增大趋势;所制备的合金压缩弹性模量值在50~57 GPa之间,具有良好的力学相容性,烧结温度变化对其影响较小。
Ti-35Nb-7Zr-5Ta alloy was prepared by spark plasma sintering (SPS). The effects of sintering temperature on the density, microstructure and mechanical properties of the alloy were studied. The results show that the alloy mainly consists of a mixed matrix of β-Ti phase and Ti-Nb-Ta-Zr solid solution and a small amount of unmelted Nb and Ta metal particles in the sintering temperature range of 950 to 1150 ° C, and the alloy has a higher Density and compressive strength. With the increase of sintering temperature, the size and structure of mixed matrix in the alloy become larger and larger, and the number of Nb and Ta metal particles become smaller and smaller. At the same time, The compressive strength and compressive strength of the alloy increase with the increase of compressive elastic modulus. The compressive elastic modulus of the prepared alloy is between 50 and 57 GPa, and has good mechanical compatibility. The change of sintering temperature has little effect on it.