Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environments of advanced coal-fired boilers

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Description

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 ... continued below

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8 p.

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Levin, B.F.; DuPont, J.N. & Marder, A.R. May 1, 1996.

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Description

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.

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8 p.

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OSTI as DE96050454

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  • Other Information: PBD: May 1996

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  • Other: DE96050454
  • Report No.: DOE/PC/95211--T1
  • Grant Number: FG22-95PC95211
  • DOI: 10.2172/390522 | External Link
  • Office of Scientific & Technical Information Report Number: 390522
  • Archival Resource Key: ark:/67531/metadc688439

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  • May 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 19, 2015, 12:12 p.m.

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Levin, B.F.; DuPont, J.N. & Marder, A.R. Cermet composite thermal spray coatings for erosion and corrosion protection in combustion environments of advanced coal-fired boilers, report, May 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc688439/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.