Materials World Network: U.S.-Japan Research Collaboration in Meta-Magnetic Shape Memory Alloys with Enhanced Ductility and Controlled Porosity

材料世界网络：美日在增强延展性和控制孔隙率的超磁形状记忆合金方面的研究合作

• 批准号: 0909170
• 负责人: Ibrahim Karaman
• 金额: $ 28万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0909170&HistoricalAwards=false
• 关键词: Materials; World; Network; U.S.; Japan

This Materials World Network award by the Metallic Materials and Nanostructures program and the Office of Special Programs in the Division of Materials Research to Texas Engineering and Experimental Station is to fabricate inexpensive meta-magnetic shape memory alloys (MMSMAs) in polycrystalline bulk form having large magnetic field-induced actuation work output and enhanced ductility using a powder metallurgy approach. This award is also cofunded by the Office of International Science and Engineering. Magnetic shape memory alloys (MSMAs) are promising candidates for actuation, sensing, energy harvesting and magnetic refrigeration. The development of these materials have been limited by small actuation work outputs, poor ductility, and a lack of systematic studies to connect the issues in solid-state physics, conventional metallurgy, and applications. The problem of low work output was recently resolved by the present U.S.-Japan team from Texas A&M and Tohoku Universities by the discovery and preliminary understanding of MMSMAs. Yet the ductility problem remains and the works on MMSMAs are limited only to single crystals, which are difficult to fabricate. In addition, porous MMSMAs will be fabricated for the evaluation of their potential in biomedical applications, focusing on the characterization of biological viability and their use as active tissue scaffolds. These goals will be achieved through the synergistic combination of materials design, fabrication, and multi-scale characterization in order to develop an understanding of the magneto-thermo-mechanical response and magneto-microstructural coupling, and evaluation of their corrosion resistance, cytotoxicity, and potential for stimulating tissue growth remotely with the field. If successful, the results of this transformative research will provide an opportunity for (a) revolutionizing the field of shape memory alloys by fertilizing completely new applications and property landscapes, (b) transformation of current understanding of field-induced shape change in MSMAs through a multi-scale, multidisciplinary characterization on the new MMSMAs; and (c) the creation of an entirely new family of tissue scaffolds that would allow remotely controlled mechanical stimulus for tissue growth. Ultimately, the methodologies in this work will contribute to the overall effort to maintain US-leading role in active and biomaterials research. Graduate and undergraduate students including several minority students will benefit through establishment of joint-degree and exchange programs with the Japanese partner institution, new course developments, classroom instruction and direct involvement in the research. K-12 students and high school teachers will be engaged in developing science projects with SMAs to increase the awareness of science and engineering among them and provide them firsthand research experience.

该材料世界网络奖由金属材料和纳米结构计划以及德克萨斯工程和实验站材料研究部特别计划办公室颁发，旨在使用粉末冶金方法制造廉价的多晶块状元磁形状记忆合金（MMSMA），该合金具有大的磁场感应驱动功输出和增强的延展性。 该奖项还由国际科学与工程办公室共同资助。 磁性形状记忆合金（MSMA）是用于驱动、传感、能量收集和磁制冷的有前途的候选材料。这些材料的发展受到驱动功输出小、延展性差以及缺乏将固态物理、传统冶金和应用中的问题联系起来的系统研究的限制。最近，来自德克萨斯农工大学和东北大学的美日团队通过对 MMSMA 的发现和初步了解，解决了工作产出低的问题。然而延展性问题仍然存在，MMSMA 的研究仅限于单晶，难以制造。此外，还将制造多孔MMSMA以评估其在生物医学应用中的潜力，重点关注生物活性的表征及其作为活性组织支架的用途。这些目标将通过材料设计、制造和多尺度表征的协同组合来实现，以便加深对磁热机械响应和磁微结构耦合的理解，并评估它们的耐腐蚀性、细胞毒性和通过场远程刺激组织生长的潜力。如果成功，这项变革性研究的结果将为以下方面提供机会：(a) 通过催生全新的应用和性能前景，彻底改变形状记忆合金领域；(b) 通过对新型 MMSMA 进行多尺度、多学科表征，转变目前对 MSMA 场诱导形状变化的理解； (c) 创建一个全新的组织支架系列，可以远程控制机械刺激以促进组织生长。最终，这项工作中的方法将有助于维持美国在活性材料和生物材料研究方面的领先地位。包括少数族裔学生在内的研究生和本科生将通过与日本合作机构建立联合学位和交换项目、新课程开发、课堂教学和直接参与研究而受益。 K-12 学生和高中教师将与 SMA 一起开发科学项目，以提高他们对科学和工程的认识，并为他们提供第一手的研究经验。