Fibre-like SiC and cubic-ZrO2/SiC composite were prepared respectively from zircon with yttrium oxide addition via carbothermal reduction process at 1600 °C for 4 h in an air atmosphere furnace, where the green samples were immerged in charred coal particles inside a high-temperature enclosed corundum crucible. The reaction products were characterized by XRD, XRF, XPS and SEM. The results indicate that ZrO2 in the products was mainly existed in the form of cubic phase. The reacted samples mainly contain cubic ZrO2, β-SiC and trace amounts of zircon, with the SiC accounting for 14.8 wt%. Furthermore, a large quantity of fibre-like SiC was surprisingly found to concentrate in the charred coal particles layers around the samples. This study obtains fibre-like SiC and cubic-ZrO2/SiC composite synchronically from zircon via carbothermal reduction process, which also bring a value-added high-performance application for natural zircon. © 2012 Elsevier Ltd.
|Journal||Materials Research Bulletin|
|Publication status||Published - 2013|