论文部分内容阅读
利用放电等离子烧结技术(SPS)制备Ti-29Nb-13Ta-4.6Zr(TNTZ)合金,研究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具有较高的致密度和抗压强度,合金由β-Ti相与Ti-Nb-Ta-Zr固溶体形成的混合基体组织及少量未熔化的Nb、Ta、Zr金属颗粒组成。随着烧结温度的升高,合金致密度和抗压强度呈增大趋势,合金中混合基体组织尺寸越来越大且不断融合联结,难熔金属颗粒数量越来越少且尺寸越来越小。合金压缩弹性模量在58~60GPa之间,说明具有良好的力学相容性,烧结温度变化对其影响较小。
Ti-29Nb-13Ta-4.6Zr (TNTZ) alloy was prepared by spark plasma sintering (SPS) to study the effects of sintering temperature on the density, microstructure and mechanical properties of the alloy. The results show that the alloy has high density and compressive strength in the temperature range from 950 ℃ to 1150 ℃. The mixed matrix microstructure formed by the β-Ti phase and Ti-Nb-Ta-Zr solid solution and a small amount of unmelted Nb , Ta, Zr metal particles. With the increase of the sintering temperature, the density and compressive strength of the alloy show an increasing trend. The size and structure of the mixed matrix in the alloy are getting larger and larger, and the number of refractory metal particles is getting smaller and smaller . The compressive elastic modulus of the alloy is between 58 and 60GPa, which shows that it has good mechanical compatibility. The change of sintering temperature has little effect on it.