Abstract
With the overall aim to study a specific family of carbon-reinforced glass-ceramic matrix composites, the structural and textural changes occurring within a glass belonging to the Mg–Al–Si–Y–O chemical system were investigated. Investigation techniques were mainly transmission electron microscopy, but also scanning electron microscopy, polarized light optical microscopy, X-ray diffraction, and thermal analysis. Some differences between the carbon (fiber)-containing material and the carbon-free material are revealed, mainly through local oxygen-depletions due to a reduction effect by carbon. Mainly, the way that the various phases allowed by the starting stoichiometry crystallize during an increasing heat-treatment is observed, i.e. magnesium aluminum silicate as indialite, yttrium silicate, magnesium aluminum oxide as spinel, in addition to corundum. Phases transformations, crystallized phase morphologies, and textural relationships between phases are among the features described.
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