Oxidation Behaviour Of A Si-C-O-Fibre-Reinforced Magnesium Alumiosilicate

The oxidation behaviour a Si-C-O-fibre-reinforced magnesium aluminosilicate has been investigated in the temperature range 1000-1200 deg C. Parabolic weight gain, together with other experimental observations, has suggested that the oxidation process was controlled by the outward diffusion of carbon monoxide gas. The matrix and fibres reacted to form enstatite and forsterite. During the initial stages of oxidation, an interlayer containing a mixture of silica and turbostratic carbon was formed. A mechanism explaining the morphological evolution of the fibre-matrix interfaces has been proposed.