Crystallographically compatible ceramic shape memory materials

金属形状记忆（SM）合金独特的机械性能已经产生了许多不同的突破性应用。因此，将这些特性应用于陶瓷，将具有很大的科学和技术意义。这样的努力将同时导致较不脆的陶瓷材料。此外，陶瓷将是在高温或恶劣环境下提供SM特性的令人感兴趣的材料。因此，在这个建议中，我将提出一个计划，探索陶瓷，将显示关键SM特性，大的可逆本征应变和高疲劳极限。我将利用机械相容性理论的预测，结合我们自己的经验，对金属NiTiCu薄膜，以确定有前途的陶瓷候选材料，表现出理想的晶体之间的转换相的兼容性。这种高度的相容性，被认为是陶瓷材料所必不可少的，然后应导致结构陶瓷材料中未知的可逆本征应变以及铁电陶瓷中的新功能。在这个项目中，特殊的应用前景将在两种陶瓷材料类别中得到展示。

The unique mechanical properties of metallic shape memory (SM) alloys have spawned many different ground breaking applications. It would thus be of much scientific as well as technological interest to transpose those properties to ceramics. Such an effort would concurrently lead to less brittle ceramic materials. Furthermore, ceramics would be interesting materials providing SM properties at high temperatures or in harsh environments. In this proposal I will thus present a plan to explore ceramics that will display the key SM characteristics, large reversible eigenstrains and high fatigue limits. I will utilize the predictions of the theory of mechanical compatibility in conjunction with our own experiences on metallic NiTiCu films to identify promising ceramic candidate materials, which exhibit next to ideal crystallographic compatibility between the transforming phases. This high degree of compatibility, judged to be essential for ceramic materials, should then result in as yet unknown reversible eigenstrains in structural ceramic materials as well as in new functionalities in ferroelectric ceramics. Within this project the exceptional application perspective will be demonstrated in both ceramic material classes.