自蔓延高温合成多孔Ti_(50)Ni_(49)Mo_1形状记忆合金  

Fabrication of Porous Ti_(50)Ni_(49)Mo_1 Shape Memory Alloy by Self-propagation High-temperature Synthesis

作　　者：李永华[1] 檀雯[1] 张宁[1] 郑洁[1] 邓子玉[1] 

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110168

出　　处：《金属功能材料》2008年第5期1-3,共3页Metallic Functional Materials

基　　金：辽宁省教育厅高等学校科学研究项目(05L372);辽宁省博士启动基金(20061022)资助

摘　　要：多孔TiNi基形状记忆合金作为新兴的生物医用材料因为兼具整体多孔结构和形状记忆合金两者的优点而引起了人们的关注。本文采用纯钛、镍和钼粉利用自蔓延高温合成工艺制备了多孔Ti50Ni49Mo1(原子百分数)合金。研究表明非稳态燃烧模式合成的多孔合金呈现出不均匀的层状孔隙结构特点,而稳态燃烧模式合成的合金具有三维连通的网状孔隙结构,孔隙分布均匀,孔隙度为60.2%,平均孔隙尺寸为420μm。室温下TiNi(奥氏体)是主要相,而Ti2Ni和TiNi3是次要相。As a new type of biomedical material, porous TiNi based shape memory alloy （SMA） has attracted much attention because it has both advantages of integral porous structure and SMA. Porous Ti50 Ni49 Mo1 （at. %） SMA has.been fabricated by self-propagation high-temperature synthesis from pure elemental Ti, Ni and Mo powders in this study. The results indicate that porous alloy synthesized from non-steady combustion mode exhibits pore feature of inhomogeneous sandwich structure while the alloy synthesized from steady combustion mode has pore characteristics of interconnected three-dimensionally mesh structure and homogeneous pore distribution with porosity of 60.2% and mean pore size of 420（m. TiNi （austenite） phase is the major one with Ti2Ni and TiNh phases being the minor ones at room temperature.

关 键 词：多孔形状记忆合金 TiNiMo合金 自蔓延高温合成 孔隙特性 燃烧模式 相组成 

分 类 号：TG139.6[一般工业技术—材料科学与工程]