ニッケル電鋳に関する条件変化による各反りの最小化検討

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タイトル別名
  • Investigation of Minimization of Warp by Varying Conditions on Nickel Electroforming
  • ニッケル デンチュウ ニ カンスル ジョウケン ヘンカ ニ ヨル カク ソリ ノ サイショウカ ケントウ

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Electroforming related to this study was conducted by varying conditions singly, such as the concentration of sodium lauryl sulfate (SLS) in the nickel sulfamate bath, the current density, or the plate thickness. The warp mechanism of electroformed plate was investigated by measuring the internal stress, the orientation using X-ray diffraction, and Vickers hardness. Results show that lowering the current density or the concentration of SLS, or increasing the electroformed plate thickness can minimize warping of the electroformed plate. When SLS was added to the nickel sulfamate bath, the surface tension decreased remarkably up to 0.01 g/dm3 (threshold, i.e., critical micelle concentration, cmc). Then it decreased only to a slight degree at concentrations higher than 0.01 g/dm3. On the other hand, the warp, Vickers hardness, and the orientation index of {220} of the electroformed plates increased remarkably up to 0.01 g/dm3. It scarcely increased at concentrations higher than 0.01 g/dm3. Therefore, it became apparent that structural changes of crystallites occurred in 0.01 g/dm3 (cmc) of the concentration of SLS as a border. Based on results of combustion analysis for the electroformed plates, atoms consisting of a single SLS, except the micelle, were incorporated in the crystallites, thereafter affecting various mechanical properties.

収録刊行物

  • 表面技術

    表面技術 63 (2), 118-, 2012

    一般社団法人 表面技術協会

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