Abstract
A multiphase coating based on Mo-Si-Al-C was formed on the surface of carbon/carbon (C/C) composites by a two-step pack cementation technique in argon atmosphere. Microstructure of the multiphase coating was characterized by X-ray diffraction, scanning electron microscope and energy dispersive spectroscope. X-ray diffraction analysis showed that the multiphase coating was composed of SiC, Mo (Si, Al) 2 , MoSi 2 and Al 4 Mo 3 Si 2 . The multiphase coating coated C/C composites exhibited a weight loss of only 0.409% after oxidation in air at 1773 K for 510 h and could endure thermal cycling between 1773 K and room temperature for 25 times. The weight loss of the coated C/C composites was primarily due to the reaction between C/C matrix and oxygen.
| Original language | English |
|---|---|
| Pages (from-to) | 154-158 |
| Number of pages | 5 |
| Journal | Applied Surface Science |
| Volume | 276 |
| DOIs | |
| State | Published - 1 Jul 2013 |
Keywords
- Carbon/carbon
- composites
- Mo-Si-Al-C multiphase coating
- Oxidation
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