期刊
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
卷 19, 期 9, 页码 849-855出版社
SPRINGER
DOI: 10.1007/s12613-012-0638-7
关键词
gallium alloys; iron alloys; yttrium; magnetostriction; supercooling; polycrystalline materials
类别
资金
- National Basic Research Priorities Program of China [2011CB606304]
- Program for New Century Excellent Talents in Chinese Universities [09-0212]
- China Postdoctoral Science Foundation [2011M500229]
Polycrystalline Fe83Ga17 alloy rods with various amounts of yttrium were prepared by high vacuum induction melting. It is found that yttrium addition has a significant effect on the structure and magnetostriction of Fe83Ga17 alloy. The small addition of yttrium alters the solidification character and the grain shape of Fe83Ga17 alloy, and as a result, columnar grains with the < 100 > preferential direction are produced. Yttrium addition improves the magnetostrictive performance of the as-cast Fe83Ga17 alloy. The magnetostriction values of the as-cast alloy with 0.32at% and 0.64at% yttrium addition go up to 119x10(-6) and 137x10(-6) under 15 MPa compressive stress, respectively. The energy dispersive spectroscopy (EDS) result shows that almost all of the yttrium atoms exist in the Y2Fe17-xGax phase. A small amount of this kind of secondary phase cannot obviously increase the saturate magnetic field.
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