The formation of nanostructured materials by consolidating ultrafine amorphous alloy particles prepared by chemical reduction

Junji Saida, Akihisa Inoue, Tsuyoshi Masumoto

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Amorphous (Fe, Co, Ni)-B binary and ternary alloy particles of diameter 20-50 nm can be prepared by chemical reduction using KBH4 as a reduction agent. In the FeB binary system, structure and chemical concentration of particles depend on the mixing molar ration of KBH4 to Fe2+ ions MR. The structure is amorphous for MR≥ 10.0 and with decreasing MR a crystalline α-phase is precipitated in an amorphous matrix. The B concentration in the amorphous phase is about 33 at.% for MR≥ 9.0 and about 25 at.% for MR {slanted equal to or less-than} 8.0. The amorphous alloy particles in (Fe, Ni, Co)-B binary and ternary systems are consolidated to a cylindrical shape at various temperatures. The structure of hot-pressed compacts is amorphous for pressing temperatures below the crystallization temperature. Tx. These crystalline phases are confirmed to have a nanometer-scale structure. It is concluded that these particles should form a fully dense amorphous bulk or a crystalline bulk consisting of nanometer-scale mixed phase.

本文言語English
ページ(範囲)577-581
ページ数5
ジャーナルMaterials Science and Engineering A
179-180
PART 1
DOI
出版ステータスPublished - 1994 5 1
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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