Preparation of silicon carbide fibers

Patent · Wed Oct 12 04:00:00 EDT 1983

OSTI ID:6705311

Wei, G C

Silicon carbide fibers suitable for use in the fabrication of dense, high-strength, high-toughness SiC composites or as thermal insulating materials in oxidizing environments are fabricated by a new, simplified method wherein a mixture of short-length rayon fibers and colloidal silica is homogenized in a water slurry. Water is removed from the mixture by drying in air at 120/sup 0/C and the fibers are carbonized by (pyrolysis) heating the mixture to 800 to 1000/sup 0/C in argon. The mixture is subsequently reacted at 1550 to 1900/sup 0/C in argon to yield pure ..beta..-SiC fibers.

• DOE Contract Number: AC05-84OR21400
• Assignee: Dept. of Energy
• Patent Number(s): None
• Application Number: ON: DE84014661
• OSTI ID: 6705311
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
CARBIDES
CARBOHYDRATES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
FIBERS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYSACCHARIDES
PRODUCTION
PYROLYSIS
RAYON
SACCHARIDES
SILICON CARBIDES
SILICON COMPOUNDS
SILICON OXIDES
THERMOCHEMICAL PROCESSES