摘要
Ti-Nb-Ta-Zr系合金有很好的生物材料应用前景,国内对其研究较少。真空熔炼制备了Ti-29Nb-13Ta-4.6Zr铸锭,对其固溶处理后在不同温度、时间下时效处理,研究了合金时效处理后的组织结构和医用性能。结果表明:830℃固溶1.5 h后的Ti-29Nb-13Ta-4.6Zr合金是单一的过冷亚稳β相,再经时效加热处理后变为α+β两相;在相同的时效时间内,时效温度升高时相的析出加快,析出相弥散度降低,合金强度下降;450℃时效处理1 680 min的合金抗拉强度为432 MPa,弹性模量为63 GPa,更接近人骨的实际情况,医用性能较好。
Ti-29Nb-13Ta-4.6Zr alloy cast ingot was prepared by vacuum smelting.As-obtained alloy ingot after solid solution treatment was aged at different temperature for different durations.The microstructure and medical performance of the aged alloy were examined.Results show that Ti-29Nb-13Ta-4.6Zr alloy obtained by solid solution at 830 ℃ for 1.5 h consists of single supercooled metastable β phase,and α+β double phases are formed after heating.At the same aging time,higher aging temperature facilitated faster generation of precipitated phases,and the dispersion of the precipitated phases and the strength of the alloy were reduced.The alloy after aging treatment at 450 ℃ for 1 680 min had a tensile strength of 432 MPa and elastic modulus of 63 GPa which were similar to those of human bones,showing good medical performance.
出处
《材料保护》
CAS
CSCD
北大核心
2011年第12期74-76,2,共3页
Materials Protection
