Electroless nickel-phosphorus (EN) coating is a chemical reaction process results in a reduction of the metallic ion. It depends on catalytic action. In thiswork, several samples of base metal were coated with (Ni-P) deposit. Then nano-sized (40nm SiC) and micro-sized (11.22µm SiC) particles were added separately to the bath to be incorporated into the coating layers. Coated samples were annealed in a vacuum furnace at a temperature at (400 ᵒC) for a period of one hour. Several tests were conducted such as, XRD, SED, microhardness and wear test. Coating layers were uniform and microcrack-free. Significant improvements in hardness and wear resistance were observed. Heat treatment introduce further increase in hardness. The morphology of the hard compound (Ni3P) deposits was global and spherical.
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