Ni-Fe matrix composites reinforced with SiC were produced by microwave sintering at various temperatures. A uniform nickel layer on SiC and Fe powders was deposited prior to sintering using electroless plating technique, allowing close surface contact. The formation of carbides between SiC and Fe powders is controlled through Ni layer existing on the starting powders. A composite consisting of a ceramic phase, SiC, within a matrix of Ni3Fe and NiFe, was prepared within the temperature range 500°C-900°C under Ar shroud. Characterization of composites were carried out by XRD, SEM(Scanning Electron Microscope), compressive testing and hardness measurements were employed. Results suggest that the best properties as σmax and hardness (HV) were obtained at 900°C and the microwave sintering of electroless Ni plated SiC and Fe powders is a promising technique to produce ceramic reinforced Nickel Fe composites.

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1. Microwave sintering of electroless Ni plated SiC and Fe powders