医用多孔Ti-10Mo合金的制备及力学性能  

Preparation and Mechanical Properties of Porous Ti-10 Mo Alloy for Biomedical Applications

作　　者：支玲玲[1] 路新[1] 孟庆宇[1] 徐伟[1] 曲选辉[1] 

机构地区：[1]北京科技大学新材料技术研究院,北京100083

出　　处：《稀有金属材料与工程》2016年第6期1554-1558,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51204015);新金属材料国家重点实验室开放基金(2012Z-10)

摘　　要：以元素粉末为原料添加造孔剂碳酸氢铵,采用粉末冶金模压烧结技术制备了多孔Ti-10Mo合金,探讨了烧结工艺与造孔剂含量对合金组织、孔隙特征和力学性能的影响规律。结果表明,在1300℃烧结可制备出具有典型魏氏体组织、孔隙分布均匀的多孔Ti-10Mo合金材料;随着造孔剂含量增加,合金孔隙率增加,孔径变大孔壁变薄,当造孔剂含量达到50%,孔隙结构互相贯通,孔径尺寸大幅增加;添加50%-60%造孔剂,制备Ti-10Mo合金孔隙率为62.8%-66.9%,平均孔径尺寸为485.6-545.9μm,其弹性模量为2.9-1.3 GPa,抗压屈服强度为129.2-56.1 MPa。The porous Ti-10 Mo alloys from elemental powders were fabricated by a powder metallurgy technique with ammonium bicarbonate as the space-holder. The effects of sintering process and space-holder content on the microstructure, porous characteristics and mechanical properties were studied. The results show that at the sintering temperature of 1300 °C the porous Ti-Mo alloys with uniform microstructure and pore distribution can be prepared, and the alloy exhibits a typical Widmanstatten structure. With the increase of the space-holder content, the pores become larger and the hole wall gets thinner. At or above 50 wt% of space-holder, pores are interconnected, forming a three-dimensional connectivity structure. When the space-holder content is in the range of 50%-60%, the alloys obtained show porosity of 62.8%-66.9% and pore sizes of 485.6-545.9 μm, and their elastic modulus and compressive yield strength vary from 2.9 to 1.3 GPa, and from 129.2 to 56.1 MPa, respectively.

关 键 词：多孔Ti-Mo合金 粉末冶金 孔隙结构 弹性模量 

分 类 号：TF125.22[冶金工程—粉末冶金] R318.08[冶金工程—冶金物理化学]