电子元件用新型TiNi基形状记忆合金的组织与性能研究  

Study on Microstructure and Properties of New-typed TiNi-based Shape Memory Alloy for Electronic Elements

作　　者：杨彦 

机构地区：[1]武警警官学院,四川成都610213

出　　处：《热加工工艺》2016年第10期97-99,102,共4页Hot Working Technology

摘　　要：基于工业二氧化钛、五氧化二钒等,采用自蔓延高温合成法,制备了电子元件用新型TiNi基形状记忆合金TiNiY_(0.1)V_(0.1),并进行显微组织观察、物相分析以及力学性能和耐腐蚀性的分析。结果表明:该新型合金由母相(B_2相)和少量Ti_2Ni相组成,具有较佳的力学性能和耐腐蚀性能。与TiNi合金相比,该新型合金的屈服平台提高58%,抗拉强度增加44%,断后伸长率增加178%,应力应变循环5次后的残余应变减小50%,腐蚀电位正移323mV,腐蚀电流密度减小31.7mA/cm^2。The new-typed TiNi-based shape memory alloy TiNiY0.1V0.1 for electronic elements was prepared by self-propagating high-temperature synthesis technology from industrial titanium dioxide, vanadium pentoxide and so on. The microstructure, phase composition, mechanical properties and corrosion resistance of the alloy were studied. The results show that the new-typed alloy is composed of base phase （B2 phase） and a little of Ti2Ni phase, which has better mechanical properties and corrosion resistance. Compared with TiNi alloy, the yield platform, tensile strength and elongation of the new-typed alloy could increase by 58%, 44% and 178%, respectively. The residual stress after stress- strain cycle for 5 times could decrease by 50%. Moreover, the corrosion potential could positively shift by 323 mV and the corrosion current density could decrease by 31.7 mA/cm2.

关 键 词：形状记忆合金 TiNiY0.1V0.1合金 力学性能 耐腐蚀性能 残余应变 

分 类 号：TG146.23[一般工业技术—材料科学与工程]