Preparation of ultra-fine amorphous powders by the chemical reduction method and the properties of their sintered products

Junji Saida; Akihisa Inoue; Tsuyoshi Masumoto

doi:10.1016/0921-5093(91)90183-N

Preparation of ultra-fine amorphous powders by the chemical reduction method and the properties of their sintered products

Junji Saida, Akihisa Inoue, Tsuyoshi Masumoto

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

28 Citations (Scopus)

Abstract

Ultra-fine amorphous powders in (Fe, Co, Ni)-B binary and ternary systems were produced by the chemical reduction method. The powders have a spherical shape with diameters ranging from 5 to 50 nm. The reaction consists mainly of the process of producing Me₂B and Me(Me = Fe, Co, Ni. Fully dense bulks of the ultra-fine amorphous (Fe, Co, Ni)-B powders were prepared by hot-pressing at temperatures below the crystallization temperature. Their densities are almost equal to those of the corresponding arc-melted powders. The hardness values of the hot-pressed compacts are considerably lower than those of the melt-spun amorphous ribbons with the same compositions.

Original language	English
Pages (from-to)	771-774
Number of pages	4
Journal	Materials Science and Engineering A
Volume	133
Issue number	C
DOIs	https://doi.org/10.1016/0921-5093(91)90183-N
Publication status	Published - 1991 Mar 15
Externally published	Yes

ASJC Scopus subject areas

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

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AB - Ultra-fine amorphous powders in (Fe, Co, Ni)-B binary and ternary systems were produced by the chemical reduction method. The powders have a spherical shape with diameters ranging from 5 to 50 nm. The reaction consists mainly of the process of producing Me2B and Me(Me = Fe, Co, Ni. Fully dense bulks of the ultra-fine amorphous (Fe, Co, Ni)-B powders were prepared by hot-pressing at temperatures below the crystallization temperature. Their densities are almost equal to those of the corresponding arc-melted powders. The hardness values of the hot-pressed compacts are considerably lower than those of the melt-spun amorphous ribbons with the same compositions.

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