Preparation and oxidation kinetics of SiC/ZrO2-SiO2 oxidation protective coating for carbon-carbon composites

作者：Huang, JF^*; Li, HJ; Zeng, XR; Li, KZ; Xiong, XB; Fu, YW

来源：Rare Metal Materials and Engineering, 2005, 34: 324-328.

• carbon/carbon composite
• high temperature
• oxidation protective coating

Sic internal bonding layer was prepared by pack cementation, and later gradient ZrO2-SiO2 coating was applied on the Sic coating surface using a sol-gel process. The as-prepared multi-coating was characterized by XRD and SEM analyses. The oxidation kinetics of the coated C/C was also investigated under different temperature. The results showed that the multi-coating was composed by Sic, SiO2, ZrO2 and ZrSiO4; the holes of Sic coating were filled with ZrO2-SiO2 layer; the oxidation resistance of the coated C/C was improved with the increase of the gradient ZrO2-SiO2 layer; the multi-coating could effectively protecting C/C composites from oxidation for 10h at 1500 degrees C, and the weight loss of the coating is less than 2.0%; the oxidation activation energy of the coated C/C is 88.2KJ/mol.

• 出版日期2005-9
• 单位西北工业大学; 深圳大学