Microstructure and morphology of SiCf-SiBC composites
LERMAT (URA CNRS 1317), ISMRA, 6 boulevard Maréchal Juin, 14050 Caen Cedex, France
Revised: 8 March 2001
Accepted: 4 April 2001
Published online: 15 July 2001
This paper deals with the study of a new generation of ceramic matrix composites, SiCf-SiBC, which consists of a 2.5D perform of SiC fibers and of a self sealing multilayered matrix. Three different batches of these CMCs have been investigated in a morphological point of view thanks to the observations performed at the mesoscopic scale by scanning electron microscopy and automatic image analysis, and also at a microscopic scale by transmission electron microscopy. Through this study, a lot of care was taken about the description of the pyrocarbon interphase and of the different matrix interfaces, which play a key role in the damage features, and more specially in the deflection of the matrix microcracks developed through tested mechanical composites.
PACS: 81.05.Mh – Cermets, ceramic and refractory composites / 68.55.Jk – Structure and morphology; thickness; crystalline orientation and texture / 68.37.Lp – Transmission electron microscopy (TEM) (including STEM, HRTEM, etc.)
© EDP Sciences, 2001