This study investigates an innovative application for developing NiCrSiC-2La2O3 composite cladding on martensitic stainless-steel SS-420 using microwave hybrid heating technique, a fast energy-efficient, and cost-effective method. The cladding was processed in a standard 2.45 GHz domestic microwave oven at 900 W for 540 s. Microstructural characterization via SEM/EDS revealed a uniform dispersion of Ni, Si, C, and La2O3 within the clad layer, with minimal porosity (0.703%) and a highly homogeneous structure. XRD analysis confirmed the formation of reinforcing intermetallic phases Ni3Si, FeNi3, Fe3O4, Ni3C, LaNi5, Fe7Ni3, and LaNiO3 enhancing mechanical properties. The clad exhibited a two-fold increase in microhardness 626.30 ± 20 Hv compared to the base steel 310 ± 20 Hv. The results indicate that microwave cladding presents a viable alternative to traditional techniques, offering rapid processing, reduced defects, and improved performance for industrial applications.
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