科研之友
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摘要
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 as-obtained multiphase coating is dense, and the flexural strength of carbon/carbon composites after coating increases and the fracture behavior changes from the pseudo-plastic fracture to brittle fracture mode. After enduring the thermal cycling between 1500 degrees C and room temperature for 20 cycles, the flexural strength of the coated specimens decreases accordingly, and the plastic increases.
- 出版日期2008-7
- 单位西北工业大学
