金属材料の液体金属蒼鉛-鉛共晶合金による質量移行の研究

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タイトル別名
  • Study of Mass Transfer of Metal and Alloys in Liquid Bismuth-Lead Eutectic Alloy
  • キンゾク ザイリョウ ノ エキタイ キンゾク ソウエン-ナマリ キョウショウ ゴウキン ニ ヨル シツリョウ イコウ ノ ケンキュウ

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抄録

A study of corrosion and mass-transfer of 18-8 stainless steel, mild steel, 5%Al-Fe, croloy 5Si, monel and Nickel in liquid Bi-Pb eutectic alloy by the thermal convection loop was conducted. The change of structure in corroded samples and the precipitates of the cold part of loop were examined by a microscope and the crystal structures of precipitates were studied by the X-ray analysis. The results obtained were as follows: (1) Nickel and monel were completely mass-transfered. The corrosion loss was most remarkable in mild steel; in 18-8 stainless steel and 5%Al-Fe it was moderate and in 18-8 Mo stainless steel and croloy 5Si it was comparatively light. (2) Nickel and nickel-component in monel were mass-transfered and precipitated in the form of the hexagonal or pentagonal γ intermetallic compound in the loop, and a bamboo-leaf-like β intermetallic compund was observed on the surface of the liquid Bi-Pb eutectic alloy. (3) Nickel-rich intermetallic β has Ni-As-type lattice and is expressed by Ni (Bi, Nb) in which the ratio of Bi to Pb is 2 to 1. (4) In 18-8 and 18-8 Mo stainless steel, the phase changes from γ to α, but in the latter the layer depth of phase change is smaller than 10 μ and a regular array of etch pits at 1 μ intervals in the grain was observed near the surface of sample.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (4), 256-260, 1960

    公益社団法人 日本金属学会

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