镍钛基轻稀土合金薄膜的组合纳米量热与微结构研究

项目名称： 镍钛基轻稀土合金薄膜的组合纳米量热与微结构研究

项目编号： No.51261017

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 赵春旺

作者单位： 内蒙古工业大学

项目金额： 50万元

中文摘要： 三元镍钛基形状记忆合金已经被证明可以达到较高的相变温度，从而可以应用于高温环境，但是较高的相变温度需要添加大量的第三元贵金属，工业应用的扩展需要发展低值的、高相变温度的形状记忆合金系统。我国尤其是内蒙古自治区拥有非常丰富的稀土资源，但是稀土产品仍以轻稀土初级原料为主，稀土工业的发展需要加强稀土的基础研究并扩展稀土的应用。大量实践证明，少量添加稀土就可以大大地改善金属合金的性能，但是稀土还没有被应用于形状记忆合金领域。本项目拟采用组合纳米量热法研究多组分、多种稀土元素添加的镍钛基轻稀土合金薄膜的晶化、相转变、热疲劳等热力学性能，采用X射线衍射和透射电子显微镜研究合金薄膜的微结构，探讨稀土添加所导致的镍钛基合金热力学性能变化的微观机制，分析镍钛基轻稀土合金系统中价电子的数量和浓度与相转变温度的关系，最终获得性能最优的镍钛基轻稀土合金薄膜，为形状记忆合金和稀土的应用研究提供理论和实验基础。

中文关键词： 镍钛镧；镍钛钕；镍钛镨；镍钛铪；微结构

英文摘要： Ternary NiTi-based shape memory alloys have been shown to achieve a higher phase transition temperature, which can be used in high temperature environment. But a higher phase transition temperature will need to add a lot of third precious metals. Industrial applications need to develop new shape memory alloy system with characters of low costs and high phase transition temperature. China, especially the Inner Mongolia Autonomous Region have a very rich rare earth resources. But the primary rare earth products are still raw light rare earth. The development of the rare earth industrial needs to strengthen the basic research of the rare earth and extend the application of the rare earth. The practices have proven that the performance of a metal alloy can be greatly improved by adding a small amount of rare earth. But the rare earth has not yet been applied to the shape memory alloy field. In this proposal, the crystallization, the phase transition, the thermal fatigue and other thermodynamic properties of the NiTi-based light rare earth alloy films with multi-component and a variety of rare earth elements will be studied by using the combinatorial nanocalorimetry. The micro-structure of the films will be also studied by using the X-ray diffraction and the transmission electron microscopy. The microscopic mechanis

英文关键词： Ni-Ti-La；Ni-Ti-Nd；Ni-Ti-Pr；Ni-Ti-Hf；Microstructure