| 摘要 |
Coated carbon composite parts to be tested for oxidation resistance are heated in a closed oven filled with an oxidizing atmosphere. During the heat cycle the carbon dioxide content of the oven atmosphere is measured by an analyzer such as a gas chromatograph. These measurements on the amount of CO2 emitted by the part provide information on the onset of oxidative failure. It forms a nondestructive test when detection of excessive carbon dioxide concentration is used to reduce the temperature and flood the oven with inert gas so the part may be saved and reprocessed. This technique can be combined with conventional weight measurements before and after oxidation to identify the part constituent, carbon composite or protective coating, that failed.
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