Tensile behavior of glass/ceramic composite materials at elevated temperatures

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6039829

Mandell, J F; Grande, D H; Jacobs, J

This paper describes the tensile behavior of high temperature composite materials containing continuous Nicalon ceramic fiber reinforcement and glass and glass/ceramic matrices. The longitudinal properties of these materials can approach theoretical expectations for brittle matrix composites, failing at a strength and ultimate strain level consistent with that of the fibers. The brittle, high modulus matrices result in a nonlinear stress-strain curve due to the onset of stable matrix cracking at 10 to 30% of the fiber strain to failure, and at strains below this range in off-axis plies. Current fibers and matrices can provide attractive properties well above 1000/sup 0/C, but composites experience embrittlement in oxidizing atmospheres at 800 to 1000/sup 0/C due to oxidation of a carbon interface reaction layer. The oxidation effect greatly increases the interface bond strength, causing composite embrittlement.

• OSTI ID: 6039829
• Report Number(s): CONF-870505-
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
BINDING ENERGY
CERAMICS
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CRACKS
EMBRITTLEMENT
ENERGY
FIBERS
FRACTURE PROPERTIES
GLASS
INTERFACES
MATERIALS
MECHANICAL PROPERTIES
OXIDATION
PHYSICAL PROPERTIES
REINFORCED MATERIALS
STRAINS
STRESS ANALYSIS
TEMPERATURE EFFECTS
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
VERY HIGH TEMPERATURE