Preparation and Characterization of Amorphous SiO_2 Coating SiC_p/Cu Composites

摘要

Hybrid sol-gel process was used to fabricate the precursor particles of amorphous SiO_2 coating at the composites of SiC_p/Cu, and then formed by vacuum hot-pressed method. Various methods were used to measure the sintered compacts of different SiC volume fraction. The results showed that the densities, bending strength and conductivity decrease slightly with the increases of the amounts of SiC, and the hardness increases first and then decreased. DTA-TG, SEM-EDS and XRD were used to characterize the thermodynamic behavior, the morphologies and the phases of the composites. It was inferred that the formation of SiO_2-Cu_2O eutectic mixture in this system and the viscous interaction of amorphous SiO_2 improved the interfacial modification of the composites.