摘要
采用粉末冶金法制备新型医用Ti-Mo-Ta-Nb-Zr合金,用阿基米德排水法、X射线衍射分析和压缩力学性能分别测试研究了不同成型压力、烧结温度和烧结时间对合金孔隙率、物相构成、弹性模量及抗压强度的影响,使用扫描电子显微镜观察合金表面以及压缩断口的微观形貌,并用能谱仪分析其化学成分。结果表明:制备所得Ti-Mo-Ta-Nb-Zr合金为近β型钛合金,α相均匀分布在合金晶界及β相基体上;可通过调整工艺参数条件来调节合金的孔隙率和相结构,达到控制合金弹性模量和抗压强度的目的;在200 MPa、1 200℃及3 h条件下制备Ti-Mo-Ta-Nb-Zr合金,其弹性模量为(20.91±0.06)GPa,抗压强度达到(1420±18)MPa,压缩断裂方式为准解理断裂,符合医用植入材料力学性能要求。
The new type medical Ti-14Mo-2.1Ta-0.9Nb-7Zr alloy with low modulus and high strength was fabricated by elemental powder metallurgy. The effects of different process parameters on the porosity, phase, elastic modulus and compressive strength of Ti-Mo-Ta-Nb-Zr alloy were investigated through Archimedes method, X-ray diffraction （XRD） and compressive mechanical properties test. The alloyg surface morphology, component and compression fractographs were observed by SEM and EDS. The results show that Ti-Mo-Ta-Nb-Zr alloy fabricated by powder metallurgy are near 13 titanium alloys; the porosity and phase structure can be adjusted by regulating the forming pressures, sintering temperature and time, thus the compressive strength and elastic modulus of Ti-Mo-Ta-Nb-Zr alloy can be controlled; The elastic modulus（20.91 ±0.06） GPa and compressive strength （1420 ± 18） MPa of Ti- Mo-Ta-Nb-Zr alloy fabricated by 200 MPa, 1200 ℃ , 3 h have a fracture mode called quasi-cleavage fracture, and it can meet the requirements of biomedical implant materials.
出处
《有色金属工程》
CSCD
北大核心
2017年第4期11-16,共6页
Nonferrous Metals Engineering
基金
贵州省科学技术基金项目(黔科合J字[2013]2102号)
贵州大学引进人才科研项目(贵大人基合字(2012)029号)
