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Conventional and microwave sintering of MoSi2 nanostructured powder: powder and parts characterisation

Abstract In this paper, MoSi2 nanostructured powder is characterised by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The powder parts were fabricated by press and sinter process or powder injection moulding in order to investigate the impacts of the sintering process on the microstructure of materials and their properties. Two approaches were investigated for the sintering stage: conventional and microwave sintering. The microwave approach does not necessitate as high temperature as conventional sintering and is much shorter. The sintered specimens were characterised (density, microstructure and phases) to compare the efficiency of the different sintering approaches and their ability to maintain the nanograins of the initial MoSi2 powder. The microwave sintering resulted in smaller grain size than either press and sinter process or powder injection moulding conventional sintered parts.