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A study on the microstructure and phase transformation of electroless nickel deposits

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Abstract

Electroless Ni-7.4 to 10% P deposits obtained from acidic nickel sulphate baths with sodium hypophosphite as a reducing agent were analysed by transmission electron microscopy, X-ray diffraction and thermal analysis. The deposits could be represented better by a microcrystalline structure composed of 4 to 5 nm fcc Ni-P solid-solution grains rather than an amorphous structure. The deposits also had the (111) texture, which persisted in nickel grains even after phase separation of nickel and Ni3P by heating in the case of the low nickel content, whereas the texture approached the random orientation with increasing phosphorus content. The phase transformation temperature was independent of the phosphorus content.

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Authors and Affiliations

  1. Department of Metallurgical Engineering, Seoul National University, Seoul, Korea

    Su Hoon Park & Dong Nyung Lee

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  1. Su Hoon Park
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  2. Dong Nyung Lee
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Park, S.H., Lee, D.N. A study on the microstructure and phase transformation of electroless nickel deposits. J Mater Sci 23, 1643–1654 (1988). https://doi.org/10.1007/BF01115703

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  • DOI: https://doi.org/10.1007/BF01115703

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