Achieving a large adiabatic temperature rise of Gd55Co25Al20 bulk metallic glass by minor Zn addition

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• 作者：L. Xia ; K. C. Chan ; M. B. Tang ; Y. D. Dong
• 刊名：Journal of Materials Science
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：50
• 期：3
• 页码：1333-1337
• 全文大小：791 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

Micro-alloying is a useful way to improve the magneto-caloric effect of Gd-based bulk metallic glasses (BMGs). However, the minor addition of other elements usually decreases the Curie temperature of BMGs. In this work, we fabricated Gd55Co25Al(20?em class="a-plus-plus">x)Zn x (x?=?2, 5) BMGs and studied their magnetic properties. It was found that a minor addition of Zn not only improved the peak value of the magnetic entropy change but also enhanced the Curie temperature of the fabricated BMG. As a result, the Gd55Co25Al15Zn5 BMG exhibits a rather high adiabatic temperature rise up to 5.1?K at a temperature of around 130?K under a field of 5?T.