DOI: 10.5176/2251-1857_M312.72
Authors: Amit Bansal, Apurbba Kumar Sharma
Abstract: In the present work, a novel development in surface engineering technique in the form of cladding of composite powder (80{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465}Ni + 20{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465}SiC by weight) on austenite stainless steel (SS-316) has been developed using microwave hybrid heating (MHH). Microwave clads were developed by exposing the preplaced composite powder to microwave radiation at 2.45 GHz frequency and 900 W power in a home microwave system. The developed clads were characterized through X-ray diffraction (XRD) and electron probe micro analysis (EPMA). The XRD spectrum of developed clad shows the presence of new phases nickel silicide, iron silicide, chromium carbide, molybdenum carbide and complex intermetallics, which are due to dissolution of SiC in presence of Ni using microwave energy at high temperature. The microstructure of the clad transverse section shows good metallurgical bonding with SS-316 substrate by partial dilution of stainless steel substrate and full melting of composite powder. The developed clads are free from visible solidification cracking. Chromium carbide and molybdenum carbide were observed as the new reinforcement particles in the matrix dominated by Ni, Si and Fe.
Keywords: Microwave hybrid heating; Composite clad; Microstructure; Characterization.
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