Zincate Treatment and Electroless Ni-P Plating on Al Single-Crystal Surface.

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  • Ａｌ単結晶表面上へのジンケート処理と無電解Ｎｉ‐Ｐめっき
  • Al タンケッショウ ヒョウメンジョウ エ ノ ジンケート ショリ ト ムデン

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Abstract

Zincate treatment and electroless Ni-P plating were conducted on the {100}, {110} and {111} surfaces of Al single crystal produced using the Bridgman method. The deposition morphology of Zn particles and Ni-P film were studied through SEM observation and different crystallographic orientation. Once deposition of Zn reached a certain level, it increased only negligibly there after. Zn particles deposited after the second zincate treatment were refined and made homogeneous by dissolution in immersion in HNO3 solution after the first zincate treatment. It was recognized that convex objects were observed on the surface after Zn particle dissolution, and also deposited on the top of convex objects by the second zincate treatment. The differences in convex objects were recognized on the crystal surface of the Al single crystal. Observation of the plating layer surface morphology showed the {111} surface to have the most homogeneous, smoothest surface.

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