Oxidation protection of porous reaction-bonded silicon nitride
| Autor: | D. S. Fox |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
chemistry.chemical_classification
Materials science Silicon Mechanical Engineering Kinetics Inorganic chemistry chemistry.chemical_element Polymer engineering.material Amorphous solid Thermogravimetry chemistry.chemical_compound Chemical engineering chemistry Coating Silicon nitride Mechanics of Materials engineering General Materials Science Internal oxidation |
| Zdroj: | Journal of Materials Science. 29:5693-5698 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/bf00349966 |
| Popis: | Oxidation kinetics of both as-fabricated and coated reaction-bonded silicon nitride (RBSN) were studied at 900 and 1000 C with thermogravimetry. Uncoated RBSN exhibited internal oxidation and parabolic kinetics. An amorphous Si-C-O coating provided the greatest degree of protection to oxygen, with a small linear weight loss observed. Linear weight gains were measured on samples with an amorphous Si-N-C coating. Chemically vapor deposited (CVD) Si3N4 coated RBSN exhibited parabolic kinetics, and the coating cracked severely. A continuous-SiC-fiber-reinforced RBSN composite was also coated with the Si-C-O material, but no substantial oxidation protection was observed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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