Abstract
A novel C/SiC/Si-Mo-Cr multilayer oxidation protective coating for carbon/carbon composites was prepared by pack cementation and slurry method. The microstructures of the as-prepared multilayer coating were characterized by XRD and SEM analyses. The effects of the coating processing and thermal shock on the mechanical properties of carbon/carbon composites were investigated by three point bending tests. The results show that the asobtained multiphase coating is dense, and the flexural strength of carbon/carbon composites after coating increases and the fracture behavior changes from the pseudoplastic fracture to brittle fracture mode. After enduring the thermal cycling between 1500°C and room temperature for 20 cycles, the flexural strength of the coated specimens decreases accordingly, and the plastic increases.
| Original language | English |
|---|---|
| Pages (from-to) | 725-728 |
| Number of pages | 4 |
| Journal | Wuji Cailiao Xuebao/Journal of Inorganic Materials |
| Volume | 23 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jul 2008 |
Keywords
- Carbon/carbon composites
- Mechanical property
- Oxidation protective coating