Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 43, Issue 4, Pages 577-586Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2011.12.018
Keywords
Polymer-matrix composites (PMCs); Environmental degradation; Surface analysis; Electron microscopy
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This paper focuses on the experimental characterization of thermo-oxidation in carbon-fiber-reinforced polymers (CFRPs) exposed to high temperatures (up to 150 degrees C) and high oxygen pressures (up to 5 bars), at the microscopic scale. Unidirectional IM7/977-2 composite specimens were aged at 150 degrees C under atmospheric air and under oxygen pressure (1.7 bars and 5 bars): periodic tests were carried out to characterize degradation phenomena after different aging times. The thermo-oxidation-induced resin shrinkage and fiber/matrix debonding were measured on the CFRP sample surface by confocal interferometric microscopy (CIM) and scanning electron microscopy (SEM). The results show that thermo-oxidation-induced degradation strongly depends on aging time, distance between fibers and partial oxygen pressure. (c) 2011 Elsevier Ltd. All rights reserved.
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