Thermal stability characterization of SiC ceramic fibers. II. Fractography and structure

Conference · Fri Aug 01 00:00:00 EDT 1986 · Ceram. Eng. Sci. Proc.; (United States)

OSTI ID:6909948

Sawyer, L C; Chen, R T; Harget, P J; Prack, E R

SiC ceramic fibers (Nicalon) exhibit tensile strength reduction following thermal treatment in air, argon and nitrogen environments above 1200 C. Grain-size variations have been observed in the treated fibers by X-ray diffraction and electron microscopy. Fractography studies show that strength reduction occurs in all thermal treatments, although the mechanism of fiber failure varies depending upon the specific environment. Structure-property relations will be developed as mechanical testing and fractography of the thermally treated fibers are associated with tensile strength loss mechanisms. 16 references.

• OSTI ID: 6909948
• Report Number(s): CONF-860152-
• Journal Information: Ceram. Eng. Sci. Proc.; (United States), Vol. 7; Conference: 10. annual conference on composites and advanced ceramic materials, Cocoa Beach, FL, USA, 19 Jan 1986
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON CARBIDES
FRACTOGRAPHY
MICROSTRUCTURE
GRAIN SIZE
HEAT TREATMENTS
MECHANICAL PROPERTIES
TENSILE PROPERTIES
X-RAY DIFFRACTION
CARBIDES
CARBON COMPOUNDS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DIFFRACTION
SCATTERING
SILICON COMPOUNDS
SIZE
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties