Abstract
The effect of oxidation with increasing time at 250°C (up to 2500 h) was studied on two series of composites consisting of a bismaleimide matrix reinforced with PAN-based high-tensile carbon fibers (sized and unsized). An extensive study at the microstructural and nanostructural scales (optical microscopy, SEM and TEM) has permitted us to determine the geometry and intensity of the oxidation. The matrix is first increasingly etched and then destroyed. From this point the fibers themselves are attacked. Perforations perpendicular to and channels parallel to the fiber axis develop. Correspondingly the major weight loss occurs as the matrix is oxidized, whereas the specific surface increases as the fibers are attacked. Sizing favors matrix attack. Whether sized or not, the fibers have a strong adhesion to the matrix.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
