Scanning Auger electron spectroscopy of the fiber/matrix interface of SiC fiber/silicate glass matrix composites

• Published in: Journal of vacuum science & technology. A, Vacuum, surfaces, and films Vol. 8; no. 3; pp. 2096 - 2100
• Main Authors: Laube, Bruce L., Brennan, John J.
• Format: Journal Article
• Language: English
• Published: 01-05-1990
• Subjects: AUGER ELECTRON SPECTROSCOPY; FIBERS; COMPOSITE MATERIALS; MATERIALS TESTING; MATRIX MATERIALS; INTERFACES; FRACTURE PROPERTIES; FABRICATION; MECHANICAL PROPERTIES; SiC; SILICON CARBIDES; CERAMICS
• ISSN: 0734-2101; 1520-8559
• DOI: 10.1116/1.577009

SiC fiber/silicate glass matrix composites have been investigated as a replacement material for jet engine components for several years. Scanning Auger electron spectroscopy (AES) has revealed a correlation between the physical properties (strength and toughness) of these composites and the chemistry of the fiber/matrix interface. Analyses of individual fiber surfaces and matrix troughs (areas of matrix exhibiting fiber pull‐out) of fractured composites have indicated that fracture toughness is imparted by a 200+ Å layer of carbon formed at the interface during fabrication. Similarly, strong bonding between matrix and fiber is associated with weak and brittle composites. The specific requirements for AES of these composites is presented.