Electrokinetic Processes--Nuclear Aspects. Quarterly Progress Report for February 1-April 30, 1957

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A number of coatings was investigated for protection of graphite against high-temperature oxidation and erosion. Well-sintered, well-bonded silicon carbide coatings were obtained by depositing elemental silicon on graphite, densifying, and sintering in CO at 1300 to 1400 deg C. However, the coatings were not perfect since complete protection was not offered against oxidation. A 75-15- 10 nickelchromium-silicon alloy sintered at 1100, 1200, and 130 deg C wet graphite very well, whereas coatings with high metallic luster were obtained at the higher temperatures. Fecral, alumina, and chromium-silicon-iron-aluminum alloys were deposited electrophoretically on graphite. Although excellent green coatings were obtained, sintered coatings ... continued below

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9 p.

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Werner, A. C. & Katz, H. May 15, 1957.

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Description

A number of coatings was investigated for protection of graphite against high-temperature oxidation and erosion. Well-sintered, well-bonded silicon carbide coatings were obtained by depositing elemental silicon on graphite, densifying, and sintering in CO at 1300 to 1400 deg C. However, the coatings were not perfect since complete protection was not offered against oxidation. A 75-15- 10 nickelchromium-silicon alloy sintered at 1100, 1200, and 130 deg C wet graphite very well, whereas coatings with high metallic luster were obtained at the higher temperatures. Fecral, alumina, and chromium-silicon-iron-aluminum alloys were deposited electrophoretically on graphite. Although excellent green coatings were obtained, sintered coatings were poor. The fecral coatings did not wet the surface, and the alumina coatings were brittle and non adherent indicating that a higher temperature was necessary. (For preceding period see KLX-10065.) (auth)

Physical Description

9 p.

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NTIS

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  • Other Information: Decl. June 10, 1960

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  • Report No.: KLX-10077
  • Grant Number: AT(30-1)-1996
  • DOI: 10.2172/4150411 | External Link
  • Office of Scientific & Technical Information Report Number: 4150411
  • Archival Resource Key: ark:/67531/metadc866369

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  • May 15, 1957

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  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 11, 2017, 3:13 p.m.

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Werner, A. C. & Katz, H. Electrokinetic Processes--Nuclear Aspects. Quarterly Progress Report for February 1-April 30, 1957, report, May 15, 1957; United States. (digital.library.unt.edu/ark:/67531/metadc866369/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.