Fiber wetting and coatings for composite fabrication. Technical report

Technical Report · Wed Oct 15 00:00:00 EDT 1986

OSTI ID:6871848

Katzman, H

Graphite fibers resist wetting when immersed in most molten metals. They must be coated with a material that can be wet and that also protects the fibers against chemical degradation during processing. A model of the graphite fiber surface is proposed, and a brief history of coatings that have been investigated for wetting is presented. The titanium-boron chemical vapor deposition process is discussed as well as the graphite-metal interface that results from that process. Finally, Aerospace-developed air-stable coatings and their processing are described. The technique used by Aerospace is a solution-coating process. The fibers are passed through appropriate organometallic solutions followed by either hydrolysis or pyrolysis of the organometallic compounds to form the desired coating on the fiber surfaces. Fibers were coated with selected oxides, nitrides, and carbides, using this technique. Also, a modification of this technique can be used to coat fibers with amorphous carbon. These coatings can be applied to other fibers as well as graphite, and some are easily wet by metals. In addition, the coatings are expected to be useful for controlling the fiber-matrix bond strength in ceramic-matrix composites.

• Research Organization: Aerospace Corp., El Segundo, CA (USA). Materials Sciences Lab.
• OSTI ID: 6871848
• Report Number(s): AD-A-175154/4/XAB; TR-0086A(2935-14)-1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON FIBERS
COATINGS
WETTABILITY
COMPOSITE MATERIALS
FABRICATION
CARBIDES
CARBON
GRAPHITE
HYDROLYSIS
MATRIX MATERIALS
METALS
NITRIDES
ORGANOMETALLIC COMPOUNDS
OXIDES
PYROLYSIS
SURFACES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTAL MINERALS
ELEMENTS
FIBERS
LYSIS
MATERIALS
MINERALS
NITROGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PNICTIDES
SOLVOLYSIS
THERMOCHEMICAL PROCESSES
360601* - Other Materials- Preparation & Manufacture