Synthesis of mullite coatings by chemical vapor deposition
- 1 June 1996
- journal article
- Published by Springer Science and Business Media LLC in Journal of Materials Research
- Vol. 11 (6), 1315-1324
- https://doi.org/10.1557/jmr.1996.0166
Abstract
Formation of mullite on ceramic substrates via chemical vapor deposition was investigated. Mullite is a solid solution of Al2O3 and SiO2 with a composition of 3Al2O3 · 2SiO2. Thermodynamic calculations performed on the AlCl3–SiCl4–CO2–H2 system were used to construct equilibrium chemical vapor deposition (CVD) phase diagrams. With the aid of these diagrams and consideration of kinetic rate limiting factors, initial process parameters were determined. Through process optimization, crystalline CVD mullite coatings have been successfully grown on SiC and Si3N4 substrates. Results from the thermodynamic analysis, process optimization, and effect of various process parameters on deposition rate and coating morphology are discussed.Keywords
This publication has 15 references indexed in Scilit:
- Effect of Ion Doping Temperature on Electrical Properties of APCVD A-SiMRS Proceedings, 1994
- Corrosion of Silicon‐Based Ceramics in Combustion EnvironmentsJournal of the American Ceramic Society, 1993
- Thermodynamic analysis for the chemical vapor deposition of composite coatings from the Al–B–Ti–N–H–Cl–Ar systemJournal of Materials Research, 1992
- Silica coatings on strongly passivated substratesSurface and Coatings Technology, 1988
- Corrosion of SiC Ceramics by Na2SO4Advanced Ceramic Materials, 1988
- Thermodynamic Approach to the Deposition of Nonstoichiometric Solids from the Gas Phase: Example of Titanium Carbide at High TemperatureJournal of the Electrochemical Society, 1981
- Determination of the thermodynamic conditions to vapour deposit TixC1−x AT 1800 KJournal of the Less Common Metals, 1981
- The Deposition of Silicon Dioxide Films at Reduced PressureJournal of the Electrochemical Society, 1979
- Stable and Metastable Equilibria in the System SiO2‐Al2O3Journal of the American Ceramic Society, 1975
- Thermodynamic Studies of High Temperature Equilibria. III. SOLGAS, a Computer Program for Calculating the Composition and Heat Condition of an Equilibrium Mixture.Acta Chemica Scandinavica, 1971