Combustion synthesis of Mg2Si

Magnesium silicide and its derivatives are perceived as light-weight eco-friendly materials for multiple applications, because of the advantageous combination of physical, mechanical and chemical properties. The principal components, silicon and magnesium, are abundant in nature and thus easily accessible. Manufacturing of Mg2Si-based materials is, however, challenging and a lot of efforts have been made to better control their composition and microstructure. In this work, magnesium silicide dense sinters were successfully produced by self-propagating reaction and hot pressing. The reaction was studied by DTA/TG and high-temperature microscopy. Composition and microstructure of reactants and products were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Property assessment comprised density, hardness, elastic modulus, specific heat, thermal diffusivity, and electrical conductivity.