Formation of ultra-fine amorphous powders in Fe-M-B (M = transition metal) systems by chemical reduction method and their thermal and magnetic properties

Akihisa Inoue; Tsuyoshi Masumoto; Junji Saida

doi:10.1007/BF02645055

Formation of ultra-fine amorphous powders in Fe-M-B (M = transition metal) systems by chemical reduction method and their thermal and magnetic properties

Akihisa Inoue, Tsuyoshi Masumoto, Junji Saida

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Abstract

Amorphous ultra-fine powders in (Fe or Co)-B and Fe-M-B (M=Cr, Mn, Co, or Ni) systems were produced by reduction of metal ions in an aqueous solution by use of KHB₄. The powders have a spherical shape with diameters ranging from 5 to 20 nm. The boron concentration is in the range of 24.1 to 44.1 at. pct and the composition of metal elements can be controlled by changing the concentration of metal ions. Crystallization temperatures and heats of crystallization for the Fe-Ni-B powders agree with those obtained for the amorphous alloys of the same composition produced by melt spinning. It is concluded that there is no significant difference in the amorphous structure obtained in chemically synthesized powders and the melt-spun ribbons, in spite of an essential difference in the formation mechanism of these amorphous alloys.

Original language	English
Pages (from-to)	2315-2318
Number of pages	4
Journal	Metallurgical transactions. A, Physical metallurgy and materials science
Volume	19 A
Issue number	9
DOIs	https://doi.org/10.1007/BF02645055
Publication status	Published - 1988 Jan 1

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Formation of ultra-fine amorphous powders in Fe-M-B (M = transition metal) systems by chemical reduction method and their thermal and magnetic properties. / Inoue, Akihisa; Masumoto, Tsuyoshi; Saida, Junji.

In: Metallurgical transactions. A, Physical metallurgy and materials science, Vol. 19 A, No. 9, 01.01.1988, p. 2315-2318.

Research output: Contribution to journal › Article › peer-review

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Formation of ultra-fine amorphous powders in Fe-M-B (M = transition metal) systems by chemical reduction method and their thermal and magnetic properties

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