ZrB2 and ZrB2-SiC powders have been produced by reducing ZrO2 and ZrSiO4 with B4C without using any furnace.Magnesium was added to the mixtures of (ZrO2+B4C) and (ZrSiO4+B4C).The reaction has been assisted by a floral...ZrB2 and ZrB2-SiC powders have been produced by reducing ZrO2 and ZrSiO4 with B4C without using any furnace.Magnesium was added to the mixtures of (ZrO2+B4C) and (ZrSiO4+B4C).The reaction has been assisted by a floral thermite packed around the compacts.By introducing elemental Si into (ZrO2+B4C) mixture,composite powders of ZrB2-SiC formed.After leaching out MgO with suitable HCl water solution,the product was analysed by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The effect of Si,B4C,and Mg on the extent of formation of ZrB2,ZrB2-SiC,and other phases has been studied.Formation of nano-sized ZrB2 and ZrB2-SiC composite powders was identified.The adaptability of the process for bulk production was examined.展开更多
文摘ZrB2 and ZrB2-SiC powders have been produced by reducing ZrO2 and ZrSiO4 with B4C without using any furnace.Magnesium was added to the mixtures of (ZrO2+B4C) and (ZrSiO4+B4C).The reaction has been assisted by a floral thermite packed around the compacts.By introducing elemental Si into (ZrO2+B4C) mixture,composite powders of ZrB2-SiC formed.After leaching out MgO with suitable HCl water solution,the product was analysed by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The effect of Si,B4C,and Mg on the extent of formation of ZrB2,ZrB2-SiC,and other phases has been studied.Formation of nano-sized ZrB2 and ZrB2-SiC composite powders was identified.The adaptability of the process for bulk production was examined.
