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Preparation of nickel-coated alumina composite powder by an aqueous-phase reduction process

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Abstract

A nickel coating on the surface of alumina particles, used as a reinforcement in metal-ceramic composite materials, substantially improves their wettability by molten metals. Nickel was deposited on alumina particles by reducing nickel ions from a solution under hydrogen pressure in the presence of ammonia as a complexing agent. It was found that the addition of Fe2+ ions and anthraquinone was necessary for forming an adequate nickel coating on the alumina surface. The optimum conditions were the [NH3]/[Ni2+] ratio of 1.6, 2760 kPa hydrogen pressure, 175 °C, and an anthraquinone addition of 0.04 g l−1.

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Authors and Affiliations

  1. Rapidly Solidified Materials Research Center and Department of Metallurgical Engineering, Chungnam National University, 305-764, Daejeon, Korea

    B. S. Kang, C. W. Won & B. S. Chun

  2. Department of Metallurgical Engineering, University of Utah, 84112, Salt Lake City, UT, USA

    H. Y. Sohn

Authors
  1. B. S. Kang
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  2. C. W. Won
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  3. B. S. Chun
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  4. H. Y. Sohn
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Kang, B.S., Won, C.W., Chun, B.S. et al. Preparation of nickel-coated alumina composite powder by an aqueous-phase reduction process. J Mater Sci 30, 3883–3887 (1995). https://doi.org/10.1007/BF01153950

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  • DOI: https://doi.org/10.1007/BF01153950

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