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Oxidation Kinetics of a Continuous Carbon Phase in a Nonreactive Matrix
Author(s) -
Eckel Andrew J.,
Cawley James D.,
Parthasarathy Triplicane A.
Publication year - 1995
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.1151-2916.1995.tb08424.x
Subject(s) - kinetics , ceramic matrix composite , materials science , carbon fibers , composite material , ceramic , matrix (chemical analysis) , phase (matter) , partial pressure , atmospheric temperature range , redox , reaction rate , thermodynamics , chemical engineering , chemistry , composite number , metallurgy , catalysis , organic chemistry , oxygen , physics , quantum mechanics , engineering
Analytical solutions of and experimental results on the oxidation kinetics of carbon in a pore are presented. Reaction rate, reaction sequence, oxidant partial pressure, total system pressure, pore/crack dimensions, and temperature are analyzed with respect to the influence of each on an overall linear‐parabolic rate relationship. Direct measurement of carbon recession is performed using two microcomposite model systems oxidized in the temperature range of 700° to 1200°C, and for times to 35 h. Experimental results are evaluated using the derived analytical solutions. Implications on the oxidation resistance of continuous‐fiber‐reinforced ceramic‐matrix composites containing a carbon constituent are discussed.