Polymer-derived SiAlCN ceramics resist oxidation at 1400°C

• DOI: 10.1016/j.scriptamat.2006.05.004
• Publication Date: 2006-05-27T07:15:13Z
• Authors: Yiguang Wang; Yi Fan; Ligong Zhang; Wenge Zhang; Linan An
• Keywords: Mullite

The oxidation kinetics of polymer-derived SiAlCN ceramics are determined at 1400 °C by measuring oxide-scale thickness as a function of oxidation time. The results reveal that the SiAlCN ceramics possess much better oxidation resistance than polymer-derived SiCN without Al, pure SiC and Si3N4. X-ray diffraction studies reveal that the oxide scales consist of cristobalite, plus a small amount of mullite for the sample with high aluminum-content. The reason that the SiAlCNs exhibited better oxidation resistance is discussed.