軟鋼面上の酒石酸塩浴からのW-Coメッキの構造について

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タイトル別名
  • On the Structure of W-Co Electrodeposits Obtained from Tartrate Bath
  • ナンコウメン ジョウ ノ シュセキサンエンヨク カラ ノ W-Co メッキ ノ コウゾウ ニ ツイテ

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抄録

The influence of bath composition and current density on the crystal structure, microscopic structure, W content, hardness and current efficiency of W-Co deposits obtained from tartrate bath was studied. The W content, the microscopic structure and the crystal structure of W-Co deposits were correlated with one another and could be classified into three groups with the increase of W/Co weight ratio in plating solution and of current density. The three groups were as follows: Group A) 20∼35 wt%W, angular microscopic structure, preferred orientation of hexagonal α Co solid solution exhibiting the (10\bar10) or the (10\bar11) plane being parallel to the surface; Group B) 36∼42 wt%W, intermediate microscopic structure, preferred orientation different from that in group A; Group C) 43∼52 wt%W, granular microscopic structure, diffused X ray diffraction pattern in the range of d=2.25 to 1.89 Å. The cause of this diffuseness of diffraction lines observed in high W deposits may be explained in terms of the increase of strain in α Co lattice owing to the supersaturation of W atoms in the lattice.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (4), 292-296, 1961

    公益社団法人 日本金属学会

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