High temperature alkali corrosion of ceramics in coal gas. Quarterly progress report No. 6, December 1, 1992--February 28, 1993
The high temperature alkali corrosion kinetics of SiC have been systematically investigated from 950 to 1100{degrees}C at 0.63 vol % alkali vapor concentration. The corrosion rate in the presence of alkaliis approximately 10{sup 4} to 10{sup 5} times faster than the oxidation rate of SiC in air. The activation energy associated with the alkali corrosion is 406 kJ/mol, indicating a highly temperature-dependent reaction rate. The rate-controlling step of the overall reaction is likely to be the dissolution of silica in the sodium silicate liquid, based on the oxygen diffusivity data.
- Research Organization:
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Center for Advanced Ceramic Materials
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-91PC91309; FG22-92PC92547
- OSTI ID:
- 10140480
- Report Number(s):
- DOE/PC/91309-T7; ON: DE93011634
- Resource Relation:
- Other Information: PBD: 24 Feb 1992
- Country of Publication:
- United States
- Language:
- English
Similar Records
High temperature alkali corrosion of ceramics in coal gas
High temperature alkali corrosion of ceramics in coal gas. Quarterly progress report No. 7, March 1, 1993--June 1, 1993
High temperature alkali corrosion of ceramics in coal gas. Eighth quarterly progress report, June 1, 1993--September 1, 1993
Technical Report
·
Mon Feb 24 00:00:00 EST 1992
·
OSTI ID:10140480
High temperature alkali corrosion of ceramics in coal gas. Quarterly progress report No. 7, March 1, 1993--June 1, 1993
Technical Report
·
Tue May 25 00:00:00 EDT 1993
·
OSTI ID:10140480
High temperature alkali corrosion of ceramics in coal gas. Eighth quarterly progress report, June 1, 1993--September 1, 1993
Technical Report
·
Tue Aug 24 00:00:00 EDT 1993
·
OSTI ID:10140480