Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environments of advanced coal-fired boilers. Semiannual technical report, January 14, 1997--August 14, 1997
Research is presently being conducted to determine the optimum ceramic/metal combination in thermally sprayed metal matrix composite coatings for erosion and corrosion resistance in new coal-fired boilers. The research will be accomplished by producing model cermet composites using powder metallurgy and electrodeposition methods in which the effect of ceramic/metal combination for the erosion and corrosion resistance will be determined. These results will provide the basis for determining the optimum hard phase constituent size and volume percent in thermal spray coatings. Thermal spray coatings will be applied by our industrial sponsor and tested in our erosion and corrosion laboratories. Bulk powder processed Ni-Al{sub 2}O{sub 3} composites were produced at Idaho National Engineering Laboratory. The composite samples contained 0, 21, 27, 37, and 45 volume percent Al{sub 2}O{sub 3} with an average particle size of 12 um. Also, to deposit model Ni-Al{sub 2}O{sub 3} coatings, an electrodeposition technique was developed and coatings with various volume fractions (0-35%) of Al{sub 2}O{sub 3} were produced. The powder and electrodeposition processing of Ni-Al{sub 2}O{sub 3} Composites provide the ability to produce two phase microstructure without changing the microstructure of the matrix material. Therefore, the effect of hard second phase particles size and volume fraction on erosion resistance could be analyzed.
- Research Organization:
- Lehigh Univ., Bethlehem, PA (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
- DOE Contract Number:
- FG22-95PC95211
- OSTI ID:
- 574257
- Report Number(s):
- DOE/PC/95211--T5; ON: DE98051903
- Country of Publication:
- United States
- Language:
- English
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Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environment. Semi-annual report, August 14, 1996--January 14, 1997
Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environments of advanced coal-fired boilers
Related Subjects
36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ALUMINIUM OXIDES
BOILERS
CHROMIUM OXIDES
COAL
COMPOSITE MATERIALS
CORROSION PROTECTION
CORROSION RESISTANCE
ELECTRODEPOSITION
EROSION
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL
PARTICLE SIZE
POWDER METALLURGY
PROGRESS REPORT
PROTECTIVE COATINGS