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Oxidation Behavior of a Si‐C‐O‐Fiber‐Reinforced Magnesium Aluminosilicate
Author(s) -
Kumar Atul,
Knowles Kevin M.
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08984.x
Subject(s) - aluminosilicate , forsterite , materials science , fiber , enstatite , magnesium , chemical engineering , diffusion , dissolution , matrix (chemical analysis) , mineralogy , inorganic chemistry , composite material , metallurgy , catalysis , chemistry , organic chemistry , physics , meteorite , astronomy , chondrite , engineering , thermodynamics
The oxidation behavior of a Si‐C‐O‐fiber‐reinforced magnesium aluminosilicate has been investigated in the temperature range 1000°‐1200°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 fibers reacted to form enstatite and forsterite. During the initial stages of oxidation, an interlayer containing a mixture of silica and turbostratic carbon was formed. This interlayer was modified progressively over time to create interface morphologies near the surface and near the center of the oxidized samples that were different from one another. A mechanism explaining the morphological evolution of the fiber‐matrix interfaces has been proposed.