Abstract
Abstract Cr C, Cr Ni C and Cr Fe Ni C deposits were successfully prepared from Cr3+-based plating baths with suitable amounts of complex agents and metal salts. The Cr-based alloy deposits could be hardened after rapid thermal annealing (RTA) at 500 °C for a few seconds. The highest hardness of 1800 Hv could be detected from the Cr C deposit after RTA at 500 °C for 15 s. The hardening mechanism of annealed Cr-based alloy deposits is attributed to the precipitation of crystalline diamond-like phases. The diamond-like phase in a membrane shape was observed in the annealed-hardened Cr C alloy deposits, while nano-sized membranes and particles were found in annealed-hardened Cr Ni C and Cr Ni Fe C deposits, respectively.
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