High-temperature oxidation behavior of reaction-formed silicon carbide ceramics
- 1 December 1995
- journal article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 10 (12), 3232-3240
- https://doi.org/10.1557/jmr.1995.3232
Abstract
The oxidation behavior of reaction-formed silicon carbide (RFSC) ceramics was investigated in the temperature range of 1100 to 1400 °C. The oxidation weight change was recorded by TGA; the oxidized materials were examined by light and electron microscopy, and the oxidation product by x-ray diffraction analysis (XRD). The materials exhibited initial weight loss, followed by passive weight gain (with enhanced parabolic rates, kp), and ending with a negative (logarithmic) deviation from the parabolic law. The weight loss arose from the oxidation of residual carbon, and the enhanced kp values from internal oxidation and the oxidation of residual silicon, while the logarithmic kinetics is thought to have resulted from crystallization of the oxide. The presence of a small amount of MoSi2 in the RFSC material caused a further increase in the oxidation rate. The only solid oxidation product for all temperatures studied was silica.Keywords
This publication has 23 references indexed in Scilit:
- Influence of Alumina Reaction Tube Impurities on the Oxidation of Chemically‐Vapor‐Deposited Silicon CarbideJournal of the American Ceramic Society, 1995
- Reactive melt infiltration of silicon-niobium alloys in microporous carbonsJournal of Materials Research, 1994
- Interpretation of the Parabolic and Nonparabolic Oxidation Behavior of Silicon OxynitrideJournal of the American Ceramic Society, 1992
- Oxidation kinetics of SiC deposited from CH3SiCl3/H2 under CVI conditionsJournal of Materials Science, 1992
- Some New Perspectives on Oxidation of Silicon Carbide and Silicon NitrideJournal of the American Ceramic Society, 1991
- High‐Temperature Passive Oxidation of Chemically Vapor Deposited Silicon CarbideJournal of the American Ceramic Society, 1989
- Oxidation of Si3N4 Alloys: Relation to Phase Equilibria in the System Si3N4‐SiO2‐MgOJournal of the American Ceramic Society, 1980
- The Microstructure of Oxide Scales on Oxidized Si and SiC Single CrystalsJournal of the American Ceramic Society, 1980
- On the Rates of Oxidation of Silicon and of Silicon Carbide in Oxygen, and Correlation with Permeability of Silica Glass.Acta Chemica Scandinavica, 1964
- The oxidation of iron at 175 to 350° CProceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, 1954