NDLI: Nondestructive evaluation (nde) for characterizing oxidation damage in cracked reinforced carbon-carbon

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Nondestructive evaluation (nde) for characterizing oxidation damage in cracked reinforced carbon-carbon

Content Provider	NASA Technical Reports Server (NTRS)
Author	Cosgriff, Laura A. Wincheski, Russell A. Walker, James L. Rauser, Richard W. Jacobson, Nathan S. Roth, Don J.
Copyright Year	2010
Description	In this study, coated reinforced carbon-carbon (RCC) samples of similar structure and composition as that from the NASA space shuttle orbiter's thermal protection system were fabricated with slots in their coating simulating craze cracks. These specimens were used to study oxidation damage detection and characterization using nondestructive evaluation (NDE) methods. These specimens were heat treated in air at 1143 C and 1200 C to create cavities in the carbon substrate underneath the coating as oxygen reacted with the carbon and resulted in its consumption. The cavities varied in diameter from approximately 1 to 3mm. Single-sided NDE methods were used because they might be practical for on-wing inspection, while X-ray micro-computed tomography (CT) was used to measure cavity sizes in order to validate oxidation models under development for carbon-carbon materials. An RCC sample having a naturally cracked coating and subsequent oxidation damage was also studied with X-ray micro-CT. This effort is a follow-on study to one that characterized NDE methods for assessing oxidation damage in an RCC sample with drilled holes in the coating.
File Size	838309
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110016010
Archival Resource Key	ark:/13960/t3mw7ds03
Language	English
Publisher Date	2010-01-01
Access Restriction	Open
Subject Keyword	Composite Materials Carbon-carbon Composites X Ray Inspection Nondestructive Tests Silicon Carbides Space Shuttle Orbiters Reentry Shielding Thermal Protection Thermal Control Coatings Tomography Heat Shielding Detection Surface Cracks Thermography Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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