High temperature alkali corrosion of dense SiC and Si{sub 3}N{sub 4} coated with CMZP and Mg-DOPED Al{sub 2}TiO{sub 5} in coal gas. Quarterly progress report No. 6, October 1, 1995--December 31, 1995
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States). Dept. of Materials Science and Engineering
High temperature alkali corrosion has been known to cause premature failure of ceramic components used in advanced high temperature coal combustion systems such as coal gasification and clean-up, coal fired gas turbines, and high efficiency heat engines. Non-oxide ceramics, such as SiC and Si{sub 3}N{sub 4}, are applied in HITAF systems for their well-known and desirable high temperature thermal and mechanical properties. However, these materials are prone to rapid corrosion under some types of high temperature coal combustion conditions. The objective of this research is to apply CMZP and Mg- Al{sub 2}TiO{sub 5} as coatings to SiC to improve corrosion resistance under coal combustion atmospheres as well as to improve high temperature mechanical properties. The research will not only develop and characterize CMZP and Mg-Al{sub 2}TiO{sub 5} coatings but will also strive to expand the existing knowledge of the mechanism of coal combustion corrosion of SiC in the temperature range of 1000- 4000{degrees}C.
- Research Organization:
- USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-94PC94224
- OSTI ID:
- 231293
- Report Number(s):
- DOE/PC/94224-T6; ON: DE96010964
- Resource Relation:
- Other Information: PBD: 31 Dec 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
High temperature alkali corrosion of ceramics in coal gas. Quarterly progress report No. 3, December 1--April 1, 1995
High temperature alkali corrosion of dense SiC and Si{sub 3}N{sub 4} coated with CMZP and Mg-doped Al{sub 2}TiO{sub 5} in coal gas. Quarterly progress report No. 1, June 3--August 31, 1994
Related Subjects
36 MATERIALS SCIENCE
SILICON CARBIDES
CORROSION PROTECTION
PROTECTIVE COATINGS
THERMAL SHOCK
SODIUM
CORROSIVE EFFECTS
COAL
COMBUSTION
PROGRESS REPORT
TEMPERATURE RANGE 1000-4000 K
TEMPERATURE RANGE 0400-1000 K
EXPERIMENTAL DATA
COAL GASIFICATION
SILICON NITRIDES
MAGNESIUM ALLOYS
MAGNESIUM PHOSPHATES
ZIRCONIUM PHOSPHATES
CALCIUM PHOSPHATES
FLEXURAL STRENGTH