Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environments of advanced coal-fired boilers
Research is presently being initiated 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 constituents` 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. During the last quarter, model Ni-Al{sub 2}O{sub 3} powder cermet composites were produced at Idaho National Engineering Laboratory by the Hot Isostatic Pressing (HIP) technique. The composite samples contained 0, 21, 27, 37, and 45 volume percent of Al{sub 2}O{sub 2} in a nickel matrix with an average size of alumina particles of 12 micrometers. The increase in volume fraction of alumina in the nickel matrix from 0 to 45% led to an increase in hardness of these composites from 85 to 180 HV{sub 1000}. The experimental procedure and preliminary microstructural characterization of Ni-Al{sub 2}O{sub 3} composites are presented in this progress report along with plans for the research in coming year. 3 figs.
- Research Organization:
- Lehigh Univ., Bethlehem, PA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-95PC95211
- OSTI ID:
- 390522
- Report Number(s):
- DOE/PC/95211--T1; ON: DE96050454
- Country of Publication:
- United States
- Language:
- English
Similar Records
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
Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environment. Semi-annual report, August 14, 1996--January 14, 1997
Related Subjects
20 FOSSIL-FUELED POWER PLANTS
36 MATERIALS SCIENCE
42 ENGINEERING
ALUMINIUM OXIDES
BOILERS
CERMETS
COAL
COMBUSTION
CORROSION
CORROSION RESISTANCE
EROSION
EXPERIMENTAL DATA
FOSSIL-FUEL POWER PLANTS
HARDNESS
INHIBITION
MICROSTRUCTURE
NICKEL ALLOYS
OPTIMIZATION
PROGRESS REPORT
SPRAYED COATINGS