Characterization of fiber-matirx interfaces in ceramic composites

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6703635

Lowden, R A; Stinton, D P; Besmann, T M

The mechanical behavior of Nicalon/SiC and Nextel/SiC composites has been improved by applying thin coatings to the fibers prior to densification to control the interfacial bond. Varying degrees of bonding have been achieved with different coating materials and layer thicknesses. Fiber-matrix bond strengths have been quantitatively evaluated using an indentation technique. The expressions for calculating frictional stress from indent impressions were modified to account for the irregular shape of the Nextel fibers. The influence of interfacial frictional stress on fracture phenomena such as matrix cracking and postfracture behavior has been examined. 31 refs., 8 figs., 1 tab.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6703635
• Report Number(s): CONF-8806103-3; ON: DE89001195
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
BONDING
CARBIDES
CARBON
CARBON COMPOUNDS
CERAMICS
COATINGS
CRYSTAL STRUCTURE
DEPOSITION
ELEMENTS
FABRICATION
FAILURES
FIBERS
FRACTURES
INTERFACES
JOINING
LAYERS
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NONMETALS
OPTIMIZATION
REINFORCED MATERIALS
SEMIMETALS
SILICON
SILICON CARBIDES
SILICON COMPOUNDS
STRESSES