Ti1.0Mn0.9V1.1基合金的微观结构和电化学性能

“与Laves相相关的BCC固溶体”是一个新概念,由此发展起来的新型钛基BCC合金贮氢能力已经达到了2.2%(质量分数)。Akiba等用TEM(透射电子显微镜)方法观测TiMnV合金的BCC相和C14相的交界面,发现存在一个厚度为10 nm的薄层。通过EDX(电子探针X射线显微分析)方法观测,这个薄层物质的组成为Ti1.0Mn0.9V1.1,但是Ti1.0Mn0.9V1.1却不具备电化学活性。在此基础上,从Ti1.0Mn0.9V1.1出发,通过组成元素的部分取代,使储氢性能优良的Ti1.0Mn0.9V1.1具有电催化活性,对Ti1.0Mn0.9V1.1系合金的结构和电化学性能进行研究,Ti1.0Mn0.9V1.1系合金有可能成为MH-Ni蓄电池潜在的高温负极材料。

Microstructure and electrochemical characteristics of Ti1.0Mn0.9V1.1 based alloy

"Laves phase related BCC solid solution" is a new concept,and the hydrogen storage capacity of the new Ti-based BCC alloy developed from it has reached 2.2 %.Through the TEM microstructure observation of the area adjacent to the BCC/C14 interface in TiMnV,a very fine lamellar structure(about 10 nm thickness) has been found.The composition of this adjacent interface phase is Ti1.0Mn0.9V1.1,but Ti1.0Mn0.9V1.1 has no electrocatalyst activity.We use the partly substitution of the element to make Ti1.0Mn0.9V1.1 to have electrocatalyst activity,and the microstructure and electrochemical characteristics of Ti1.0Mn0.9V1.1 based alloys are studied.Ti1.0Mn0.9V1.1 may be a potential negative electrode material in Ni/MH battery at high temperature.