Plasma-sprayed ceramic coatings for protection against molten metal.

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Description

Molten metal environments pose a special demand on materials due to the high temperature corrosion effects and thermal expansion mismatch induced stress effects. A solution that has been successfully employed is the use of a base material for the mechanical strength and a coating material for the chemical compatibility with the molten metal. The work described here used such an approach coating tungsten rods with aluminum oxide, yttria-stabilized zirconia, yttrium oxide, and erbium oxide deposited by atmospheric plasma spraying. The ceramic materials were deposited under varying conditions to produce different structures. Measurement of particle characteristics was performed to correlate to ... continued below

Physical Description

27 p.

Creation Information

Hollis, K. J. (Kendall J.); Peters, M. I. (Maria I.) & Bartram, B. D. (Brian D.) January 1, 2002.

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Description

Molten metal environments pose a special demand on materials due to the high temperature corrosion effects and thermal expansion mismatch induced stress effects. A solution that has been successfully employed is the use of a base material for the mechanical strength and a coating material for the chemical compatibility with the molten metal. The work described here used such an approach coating tungsten rods with aluminum oxide, yttria-stabilized zirconia, yttrium oxide, and erbium oxide deposited by atmospheric plasma spraying. The ceramic materials were deposited under varying conditions to produce different structures. Measurement of particle characteristics was performed to correlate to material properties. The coatings were tested in a thermal cycling environment to simulate the metal melting cycle expected in service. Results of the testing indicate the effect of material composition and spray conditions on the thermal cycle crack resistance of the coatings.

Physical Description

27 p.

Source

  • Submitted to: The 13th International Federation for Heat Treatment and Surface Engineering Congress, 7-10 October, Columbus, OH

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  • Report No.: LA-UR-02-6249
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976364
  • Archival Resource Key: ark:/67531/metadc928305

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  • January 1, 2002

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 6:50 p.m.

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Hollis, K. J. (Kendall J.); Peters, M. I. (Maria I.) & Bartram, B. D. (Brian D.). Plasma-sprayed ceramic coatings for protection against molten metal., article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc928305/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.