Abstract
Ni-W-Cr-P alloy coatings were prepared by electroless deposition on stainless steel. The effects of heat-treatment on the structure and phase transformation behavior, microhardness of the Ni-W-Cr-P alloy coatings were mainly investigated. XRD analysis shows that as-deposited Ni-W-Cr-P coatings were microcrystalline; the precipitation of Ni3P was observed at the annealing temperature of 400°C; after heat-treatment at 500°C the crystallization of Ni3P and Ni was near completion; at 600°C new phase Cr1.12Ni2.88 was observed and Ni3P began to decompose. Cr1.07Fe18.93 and Ni17W3 were formed when heated at 700°C, and Ni3P was not found. With increasing temperature to 800°C, FeNi2P and Cr4Ni15W were the only two dominant phases. The experimental results reveal that with an increase in the annealing temperature, micro-hardness of the Ni-W-Cr-P alloy coatings increased, reached the maximum value at 700°C, and then decreased slightly. Annealing temperature dependence of the microhardness and corrosion resistance of the coatings was also observed. The related strengthening mechanism in the electroless deposited Ni-W-Cr-P alloy coatings is also discussed.
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Jin, Y., Fan, J., Mou, K. et al. Structural and phase transformation behaviour of electroless Ni-W-Cr-P alloy coatings on stainless steel. Inorg Mater 46, 631–638 (2010). https://doi.org/10.1134/S0020168510060130
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DOI: https://doi.org/10.1134/S0020168510060130