取决于方向的相变换路径,使NiTi合金具有卓越的超弹性和弹性热量性能
Jiaqi Lu1, Muhammad Aziz2, Hao Li1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, 430070, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 13, 2025
概括
研究人员开发了一种可扩展的制造方法,用于elastocaloric材料,实现优越的超弹性和温度变化,用于固态冷却. 这一突破提高了下一代制冷设备的材料性能.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 热力学是一种热力学.
背景情况:
- 固态制冷的商业化需要具有很大的附加性温度变化,高超弹性应力和显著回收应变的弹性热质材料.
- - (NiTi) 合金是有希望的,但需要优化以提高弹性热量性能.
研究的目的:
- 开发一个可扩展的制造路线,用于具有改善弹性热量特性的NiTi合金.
- 为了提高性能,研究晶体结构和相变态行为之间的关系.
主要方法:
- 集成的计算模拟与实验制造过程.
- 进行了微观结构性表征,以分析谷物方向和双胞胎形成.
- 评估了NiTi合金的取决于方向的相变态行为.
主要成果:
- 实现了具有超弹性和弹性度的NiTi合金,超过了以前报告的所有弹性金属.
- 确定一个偏好的 (001) 粒度方向通过[100](001) 滑动系统促进了 (001) 复合双胞胎.
- 证明这种质地促进了低指数可逆马石的形成,提高了相位转换的可逆性.
结论:
- 建立了结晶学纹理,变体选择和功能性弹性热量性能之间的直接相关性.
- 为先进的固态冷却设备提供了可扩展的材料解决方案.
- 这些发现为下一代高效的固态制冷技术铺平了道路.
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