...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research >Compositional and microstructural evolution during annealing of Terfenol-D nanoparticulate films
【24h】

Compositional and microstructural evolution during annealing of Terfenol-D nanoparticulate films

机译：Terfenol-D纳米颗粒薄膜退火过程中的组成和微观结构演变

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Although highly magnetostrictive thin films of Terfenol-D have been produced by a variety of methods, high-quality thick films have proved to be far more challenging to produce. To date, thick film processes have resulted in nanoparticulate films that contain significant porosity that reduces stiffness and results in oxidation and poor magnetostrictive performance. With the goal of understanding microstructural and compositional factors that affect performance, nanoparticulate Terfenol-D thick films were produced by laser ablation of microparticle aerosols combined with supersonic impaction. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, x-ray photon spectroscopy, and magnetic measurements were performed on nano-particles and on films as-deposited and after annealing in vacuum or in a reducing atmosphere. These measurements show that segregation occurs during oxidation of the films, prior to annealing, and results in films with poor magnetostriction. The segregation persists during annealing with no visible changes to the morphology or density of the nanoparticulate films exposed to temperatures as high as 800 ℃. These results suggest that oxidation and segregation must be avoided to produce highly magnetostrictive thick films.
机译：尽管已通过多种方法制备了具有高磁致伸缩性的Terfenol-D薄膜，但事实证明，生产高质量的厚膜更具挑战性。迄今为止，厚膜工艺已导致纳米颗粒膜具有明显的孔隙率，从而降低了刚度并导致氧化和差的磁致伸缩性能。为了理解影响性能的微结构和组成因素，通过激光烧蚀微粒气溶胶并结合超音速冲击技术，生产出了纳米颗粒的Terfenol-D厚膜。 X射线衍射，扫描电子显微镜，透射电子显微镜，X射线光子光谱和磁性测量是在纳米粒子和沉积的薄膜上以及在真空或还原性气氛中退火后进行的。这些测量结果表明，在退火之前，在膜的氧化过程中会发生偏析，并导致膜的磁致伸缩性差。退火过程中偏析持续存在，暴露在高达800℃的温度下，纳米颗粒薄膜的形貌或密度无明显变化。这些结果表明必须避免氧化和离析以产生高磁致伸缩厚膜。

著录项

  • 来源
    《Journal of Materials Research》 |2011年第20期|p.2672-2681|共10页
  • 作者

    James Ma; Michael F. Becker; John W. Keto; Desiderio Kovar;

  • 作者单位

    Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78731;

    Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78731 Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78731;

    Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78731 Department of Physics, University of Texas at Austin, Austin, Texas 78731;

    Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78731 Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas 78731;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号