Author/Authors :
Zou، نويسنده , , Binglin and Khan، نويسنده , , Zuhair S. and Fan، نويسنده , , Xizhi and Huang، نويسنده , , Wenzhi and Gu، نويسنده , , Lijian and Wang، نويسنده , , Ying and Xu، نويسنده , , Jiaying and Tao، نويسنده , , Shunyan and Yang، نويسنده , , Kuiyue and Ma، نويسنده , , Hongmei and Cao، نويسنده , , Xueqiang، نويسنده ,
Abstract :
A new coating with Er2SiO5 as inner layer and LaMgAl11O19 (LMA) as top layer was designed and deposited on C/SiC composites by atmospheric plasma spraying to improve the oxidation resistance of the substrate at high temperature. Microstructure, oxidation protection and failure mechanism of the Er2SiO5/LMA coating during dynamic thermal cycling (DTC) were investigated. The results showed that a good interfacial bonding between the substrate and the coating was present before and after DTC test. Weight loss for the sample coated on one-side was 4.5% after 11 cycles of heating for 85 min, and for the uncoated sample was as high as 20.6%. Failure mechanism of the coating resulted from the liquid sintering of the coating and the formation of bubbles between the substrate and the coating.
Keywords :
Oxidation , thermal cycling , Failure mechanism , C/SiC composites , Coating
