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. 4, April 1, 1995--June 30, 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. 4, April 1, 1995--June 30, 1995
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-stabilized Al{sub 2}TiO{sub 5} as coatings to SiC and Si{sub 3}N{sub 4} to improve the 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 and Si{sub 3}N{sub 4} in the temperature range of 1000-1400{degrees}C.
- University of North Texas United States
- University of North Texas United States
- Virginia Tech United States
Aluminium Compounds, Temperature Range 1000-4000 K, Calcium Phosphates, Ceramics, And Peat, Zirconium Phosphates, Magnesium Compounds, Combustion, Corrosion Protection, Titanium Oxides, Flexural Strength, Mechanical Properties, Lignite, Microstructure, Silicon Carbides, Progress Report, 36 Materials Science, Sodium, Silicon Nitrides, Magnesium Phosphates, Magnesium Alloys, Protective Coatings, Corrosive Effects, Corrosion, 01 Coal, Coal Gasification, Coal, Corrosion Resistance, Experimental Data, Thermal Shock, Temperature Range 0400-1000 K
Aluminium Compounds, Temperature Range 1000-4000 K, Calcium Phosphates, Ceramics, And Peat, Zirconium Phosphates, Magnesium Compounds, Combustion, Corrosion Protection, Titanium Oxides, Flexural Strength, Mechanical Properties, Lignite, Microstructure, Silicon Carbides, Progress Report, 36 Materials Science, Sodium, Silicon Nitrides, Magnesium Phosphates, Magnesium Alloys, Protective Coatings, Corrosive Effects, Corrosion, 01 Coal, Coal Gasification, Coal, Corrosion Resistance, Experimental Data, Thermal Shock, Temperature Range 0400-1000 K
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