Abstract
The oxidation behavior and damage mechanism of modifiers and compounds of many types of ceramic coatings were investigated experimentally. A MoSi2/SiC coating was produced by infiltration process. The oxidation behavior of the coated-C/C composites was studied at various temperatures below 1650°C. The oxidation results showed that the MoSi2/SiC coating for thermal-protection of C/C composites has high oxidation resistance at temperature up to 1650°C. In the present work, a new model of an oxidation protective, self-sealing multi-layer coating system was proposed for C/C composites. The multi-layer coating possessing the self-sealing property was obtained by pack cementation and infiltration process. The protection coating system for C/C composites consists of an inner layer of SiC and an outer layer of porous refractory oxides filled by modified SiO2 glass. Isothermal and cyclic thermal oxidation tests showed the multi-layer coating was capable of protecting the C/C composites in an oxidizing atmosphere at temperature up to 1800°C.
| Original language | English |
|---|---|
| Pages (from-to) | 111-114 |
| Number of pages | 4 |
| Journal | Chinese Journal of Aeronautics |
| Volume | 12 |
| Issue number | 2 |
| State | Published - May 1999 |