Thermomechanical characterization of graphite/polyimide composites

Conference · Fri Jan 01 04:00:00 EST 1982 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:6452961

Kunz, S C

The stiffness, strength, and shear properties of three polyimide resins combined with three different moduli graphite have been determined in the temperature range 20 to 371/degree/C(68to700/degree/F). Flexural test results from the various unidirectional composites show that stiffness retention with increasing temperature is affected only by the thermal integrity of the polyimide matrix. Thermal-oxidative stability of the various graphite fibers, and its effect on interfacial strength degradation, are considered primary causes for the fiber-type dominated strength behavior. In general, strength retention appears directly related to degree of graphitization (modulus) of the fibers. The accumulated mechanical property data, some previously unknown, are correlated with microstructural features such as fiber-matrix adhesion, porosity, and processing defects.

• Research Organization: Sandia Natl Lab, Albuquerque, NM, USA
• OSTI ID: 6452961
• Report Number(s): CONF-8011179-
• Conference Information: Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
CARBON
COMPOSITE MATERIALS
ELEMENTAL MINERALS
ELEMENTS
GRAPHITE
HIGH TEMPERATURE
MATERIALS
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
MINERALS
NONMETALS
POLYMERS
TEMPERATURE DEPENDENCE