Characterization of multiple SiC and C coatings on SiC fibers for composites

Conference · Sun Dec 31 04:00:00 UTC 1995

OSTI ID:258307

Paulson, T E; Pantano, C G ^[1]; Veitch, L C ^[2]

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1. Pennsylvania State Univ., University Park, PA (United States)
2. NASA Langley Research Center, Hampton, VA (United States)

The timely analysis of materials is crucial as new composites are developed for advanced applications in the aerospace industry. Components of the composites, such as fiber coatings, the interface region between the fiber and the matrix material, and the stability of the fiber coatings and fibers, will influence the final properties of the composite materials. Analyzing non-standard surfaces, i.e. cylindrical vs. flat substrates, in order to properly assess the chemical and microstructural properties of the fibers and coatings is not a trivial task. Sample preparation such as cutting and polishing can destroy valuable information contained at interfaces and within multiple coatings. Existing analytical methods have been investigated where most of the sample preparation has been eliminated. For this study, alternating layers of SiC and C on Textron`s SCS-0 SiC fiber were characterized using Secondary Ion Mass Spectrometry depth profiling (12KeV Cs{sup +} primary beam, negative SIMS mode), Scanning Auger Microscopy and Scanning Electron Microscopy. Several of these fibers were also heat-treated in an oxygen environment at 1200{degrees}C for 1 to 50 hours. SIMS depth profiling and SEM were used to ascertain the oxidative stability of the multi-layer coating on SiC fibers.

• OSTI ID: 258307
• Report Number(s): CONF-9506225--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
COATINGS
COMPOSITE MATERIALS
FIBERS
HEAT TREATMENTS
MASS SPECTROSCOPY
SILICON CARBIDES
SPATIAL RESOLUTION