Preparation and Properties of Iron Powder Plated with Nickel and Cobalt |
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Authors: | Lavrenko Vladimir A |
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Affiliation: | (1) National Academy of Sciences of Ukraine, Institute for Problems of Materials Science, ul. Krzhizhanovskogo 3, Kiev 142, Ukraine, 03142 |
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Abstract: | The magnetic properties (magnetic induction and coercive force) of iron powder coated with nickel and cobalt as a result of chemical deposition from hypophosphite electrolytes are studied. Thermogravimetry, differential thermal and x-ray phase analyses are used to study in detail the kinetics and mechanism of high-temperature oxidation in air (up to 1200°C) for the original and coated powders. The phase composition of oxide films on specimens annealed at all temperatures of the DTA-curve peaks is determined. The possibility of increasing the high-temperature oxidation resistance of iron powder coated with nickel or cobalt is demonstrated. |
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Keywords: | iron cobalt nickel coating chemical deposition magnetic induction coercive force |
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