Microstructure and magnetic properties of cuaglafe immiscible alloys with an amorphous phase + 1

Takeshi Nagase, Tomoyuki Terai, Tomoyuki Kakeshita, Megumi Matsumoto, Yoshikazu Fujii

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The solidification microstructure and magnetic properties of rapidly solidified melt-spun ribbons in Cu 43.2 Ag 32.0 La 4.8 Fe 20 (at%) alloy, which was designed as the combination of the CuAg-based Cu 54 Ag 40 La 6 alloy with high glass-forming ability and Fe, was investigated. The composite of an amorphous matrix and dispersed crystalline phases were obtained in the melt-spun ribbons. The spherical BCC-Fe nanocrystals, which were surrounded by Cu-rich crystalline phases, were embedded in a CuAgLa-based amorphous matrix. The particular solidification structure in melt-spun ribbons can be explained by liquid-phase separation to form major CuAgLa-rich and minor Fe-rich liquids, an amorphous phase formation in major CuAgLa-rich liquid, and the crystallization of the separated Fe-rich liquid globules during the cooling of the thermal melt. The melt-spun ribbon shows typical ferromagnetic magnetic properties caused by the 10 nm-ordered spherical BCC-Fe nanocrystals.

Original languageEnglish
Pages (from-to)554-560
Number of pages7
JournalMaterials Transactions
Issue number4
Publication statusPublished - 2019


  • Amorphous alloy
  • Electron microscopy
  • Magnetic property
  • Microstructure
  • Rapid solidification


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