Thermal stability and magnetic properties of Fe-Nd-Al amorphous alloys

Ding Chen, Akira Takeuchi, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Iron-rich Fe 50Nd 50-xAl x (x = 5, 10, 15, 20 at%) alloys were produced by copper mold casting and melt-spinning in order to examine the formation of amorphous alloys. The bulk amorphous cylinders with diameters up to 1.5 mm have been obtained for the Fe 50Nd 35Al 15 alloy. The crystallization temperature (T x) and melting temperature (T m) of the alloy are 774 and 880 K, respectively. Accordingly, the temperature interval of T m and T x, ΔT m (=T m-T x), is calculated to be 106 K, and the reduced crystallization temperature (T x/T m is 0.88. The small ΔT m and high T x/T m values are presumed to be the origin for the achievement of the high amorphous-forming ability of the Fe-Nd-Al alloy. The bulk amorphous cylinder exhibits semi-hard magnetic properties at room temperature, i. e., 0.117 T for remanence and 50 kA/m for intrinsic coercive field for Fe 50Nd 35Al 15 alloy with a diameter of 1.5 mm. Moreover, soft to hard magnetic transition between the ribbon and bulk specimens was observed in the Fe-rich Fe-Nd-Al alloys. The semi-hard magnetic properties for the Fe-rich Fe-Nd-Al amorphous alloys with high amorphous-forming ability are promising for future progress as a new type of Fe-based magnetic material.

Original languageEnglish
Pages (from-to)2844-2847
Number of pages4
JournalMaterials Transactions
Volume46
Issue number12
DOIs
Publication statusPublished - 2005 Dec

Keywords

  • Amorphous-forming ability
  • Bulk amorphous alloy
  • Iron-neodymium-aluminum alloy
  • Reduced crystallization temperature
  • Semi-hard magnetic properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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