Thermal stability and magnetic properties of Gd-Fe-Al bulk amorphous alloys

Ding Chen, Akira Takeuchi, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Gd65Fe20Al15, Gd65Fe15Al20 and Gd70Fe15Al15 bulk amorphous alloys were produced by copper mold casting method with the maximum diameters of 2, 1 and 1 mm, respectively. The crystallization temperature (Tx) and melting temperature (Tm) of the Gd65Fe20Al15 bulk amorphous alloy are 808 and 943 K, respectively. Accordingly, the temperature interval of Tm and Tx, ΔTm (=Tm - Tx), is as small as 135 K and the reduced crystallization temperature (Tx/Tm) is as high as 0.86. The small ΔTm and high Tx/Tm values are presumed to be the origin for the achievement of the high amorphous-forming ability of the Gd-Fe-Al bulk amorphous alloy. The Gd65Fe20Al15, Gd65Fe15Al20 and Gd70Fe15Al15 bulk amorphous cylinders with a diameter of 1 mm exhibit superparamagnetism at room temperature, while the amorphous ribbon shows the paramagnetism at room temperature. Finally, the mechanical properties of Gd65Fe20Al15 bulk amorphous alloys are investigated.

Original languageEnglish
Pages (from-to)199-203
Number of pages5
JournalJournal of Alloys and Compounds
Volume440
Issue number1-2
DOIs
Publication statusPublished - 2007 Aug 16

Keywords

  • Bulk amorphous materials
  • Magnetic properties
  • Metallic glasses

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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