Nanostructured and magnetic materials

纳米结构和磁性材料

• 批准号: 5604-2006
• 负责人: Dunlap, Richard
• 金额: $ 1.82万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2008
• 资助国家: 加拿大
• 起止时间: 2008-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=389171
• 关键词: Nanostructured; magnetic; materials

This research program deals with the development of new advanced materials.  It approaches this problem through a thorough understanding of the physical properties of the materials and a careful systematic investigation of materials using efficient combinatorial materials science methods.  Three basic classes of materials will be studied: (1) magnetic shape memory alloys, (2) magnetostrictive materials and (3) Li-ion battery electrode materials.  Magnetic shape memory alloys and magnetostrictive materials both exhibit large magnetoelastic effects and change their external dimensions when a magnetic field is applied.  Conversely, the application of a mechanical strain can result in the production of a magnetic field.  These properties allow the materials to be used for applications such as sonar projectors, missile guidance actuators or magnetic field sensors.  Our work will deal with Ni-Mn-Ga based magnetic shape memory alloys and Fe-Ga based magnetostrictive alloys.  Material compositions and preparation methods will be developed to optimize the usefulness of the materials.  We will also look at the development of new Li-ion battery electrode materials.  Through a careful study of material properties we anticipate the development of materials that will improve both the capacity and cycle life of rechargeable Li batteries.

该研究计划涉及新的先进材料的发展。它通过对材料的物理特性的透彻理解和使用有效的组合材料科学方法对材料进行仔细系统的研究来解决这个问题。将研究三种基本类型的材料：（1）磁性形状记忆合金，（2）磁致伸缩材料和（3）Li-磁性形状记忆合金和磁致伸缩材料都表现出很强的磁弹性效应，并改变了它们的外当施加磁场时，尺寸。相反，施加机械应变可以导致磁场的产生。这些特性允许材料用于诸如声纳投影仪，导弹制导执行器或磁场传感器。我们的工作将涉及Ni-Mn-Ga基磁性形状记忆合金和Fe-镓基磁致伸缩合金。材料成分和制备方法将被开发，以优化材料的用途。我们还将着眼于新的锂，离子电池电极材料。通过对材料性能的仔细研究，我们预计将开发出既能提高容量，可充电锂电池的循环寿命。