摘要
To protect carbon/carbon (C/C) composites from oxidation, a new type of oxidation protective coating has been produced by a two-step pack cementation technique. XRD and SEM analysis show, the coating obtained by the first step pack cementation was a porous β-SiC structure, and a new phase of CrSi 2 was generated in the porous SiC coating after heat-treatment according to the second step pack cementation process. Oxidation test shows that, the weight loss of the SiC coated C/C is up to 11.26% after 5 h oxidation in air at 1773 K, and the weight loss of the CrSi 2 -SiC coated C/C composites is only 4.15% after oxidation in air at 1773 K for 34 h. The oxidation of C/C composites was primarily due to the reaction of C/C matrix and oxygen diffusing through the penetrable cracks in the coating.
| 源语言 | 英语 |
|---|---|
| 页(从-至) | 3475-3480 |
| 页数 | 6 |
| 期刊 | Applied Surface Science |
| 卷 | 252 |
| 期 | 10 |
| DOI | |
| 出版状态 | 已出版 - 15 3月 2006 |
学术指纹
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