Novel Magnetic Shape Memory Alloy Thin Films for Sensor and Actuator Applications

用于传感器和执行器应用的新型磁性形状记忆合金薄膜

• 批准号: 1129065
• 负责人: Xinghang Zhang
• 金额: $ 26.11万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1129065&HistoricalAwards=false
• 关键词: Novel; Magnetic; Shape; Memory; Alloy

The research objective of this award is to investigate novel magnetic shape memory alloy thin films and use these films as the backbone of sensors and actuators. In particular, a class of novel Ni-based Heusler alloy films, which is capable of delivering high frequency response as well as high actuation strain due to Zeeman energy induced phase transformations, will be used as a model system and tested for real applications. This objective will be achieved by using the following scientific approaches: (1) investigate the influence of phase segregation on phase transformations; (2) explore and tailor residual stress in films to tune phase transformations; (3) understand the size effect on field induced strain and reversible phase transformations; (4) demonstrate the concept of magnetic field sensing via bilayer films; and (5) fabricate actuators via membranes. If successful, the benefits of this research will include elucidation of fundamental magneto-microstructural mechanisms of field-induced shape change across multiple length scales, and a new class of magnetic shape memory alloy films for sensor and actuator applications. The project will significantly improve the design of active sensing systems capable of fast and reversible deformation, damping and passive power generation. Second, it will promote a local learning environment focusing on magnetic thin films. Activities will include creation of teaching modules of active materials, involvement of underrepresented groups through the ?Pathway to Ph.D.? fellowship program at Texas A&M University, laboratory demonstration models in nanomaterials for grades 7-12, and involvement of undergraduate researchers. Third, collaborations with scientists at the Center for Integrated Nanotechnologies, at Los Alamos National Laboratory and Sandia National Laboratory through the existing user project will provide graduate student opportunities to work at these advanced research centers and laboratories.

该奖项的研究目标是研究新型的磁性记忆合金薄膜，并将这些膜用作传感器和执行器的骨干。特别是，一类新型的基于NI的Heusler合金膜能够提供高频响应以及由于Zeeman Energy诱导的相变引起的高驱动菌株，将用作模型系统并测试实际应用。该目标将通过使用以下科学方法来实现：（1）研究相分离对相变的影响； （2）探索和量身定制膜中的残留应力，以调整相变； （3）了解对场诱导应变和可逆相变的尺寸影响； （4）通过双层膜演示磁场传感的概念； （5）通过膜制造执行器。如果成功，这项研究的好处将包括阐明跨多个长度尺度的磁场诱导形状变化的基本磁通微观结构机制，以及用于传感器和执行器应用的新的磁性内形状合金膜。该项目将显着改善能够快速和可逆的变形，阻尼和被动发电的活动感应系统的设计。其次，它将促进关注磁性薄膜的本地学习环境。活动将包括创建主动材料的教学模块，通过博士学位的途径参与代表性不足的群体？德克萨斯农工大学的奖学金计划，7 - 12年级的纳米材料的实验室演示模型以及本科研究人员的参与。第三，通过现有用户项目与洛斯阿拉莫斯国家实验室和桑迪亚国家实验室的综合纳米技术中心的科学家合作将为这些高级研究中心和实验室工作提供研究生机会。