ZrB2-SiC ceramics, whose SiC is generally incorporated into the system by mechanical mixing, are known to have better performance than monolithic ZrB2. Therefore, synthesis of duplex ZrB2-SiC powders is beneficial for improving sinterability and mechanical properties of ZrB2-SiC composites. In the present work, ZrB2-SiC duplex powders with different morphologies were synthesized at 1550 C for 2 h using as-synthesized amorphous hydrous ZrO2-SiO2. Both precipitation and sol-gel methods were used to prepare ZrO2-SiO 2 precursors. ZrB2-SiC powder derived from precipitation method presented a rod-like morphology with smaller irregular particles adhering to them. And the morphology from sol-gel method was equiaxed shape with a very uniform distribution for principal components of Zr and Si.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry