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Durability of ceramic matrix composites in combustion environments
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Robinson, Raymond C. Smialek, James L. |
| Copyright Year | 1999 |
| Description | SiO2 scale volatility and the resulting recession of SiC has been previously identified for CVD, as well as sintered, SiC and Si3N4 materials. Linear weight loss and surface recession of SiC was observed as a result of SiO2 volatility for both fuel-lean and fuel-rich gas mixtures. A strong Arrhenius temperature dependence exist and parametric studies using multiple linear regression were used to develop recession relationships as a function of e(sup -Q/RT) central dot P(sup X)V(sup y) for both lean and rich combustion conditions. Recession of 0.2 - 2.0 micron/hr is predicted for typical combustion conditions at 1200 - 1400 C, with a somewhat higher absolute recession rate and activation energy for rich combustion versus lean. |
| File Size | 297849 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20000021273 |
| Archival Resource Key | ark:/13960/t38101m8s |
| Language | English |
| Publisher Date | 1999-01-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials Temperature Dependence Ceramic Matrix Composites Volatility Durability Combustion Silicon Dioxide Gas Mixtures Vapor Deposition Losses Sintering Silicon Nitrides Recession Activation Energy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
