Tribological Characteristics of sputtered Au/Cr films on alumina substrates at elevated temperatures

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This paper describes research to evaluate the tribological properties of alumina pins sliding against thin sputtered gold films deposited on alumina disk substrates. A 250 {angstrom} thick chromium interlayer was first deposited onto the alumina test disks to enhance adhesion and high temperature wetting of the gold films. The Au/Cr films were tribotested in pure sliding in a pin-on-disk tribometer under a 4.9 N load at 1 m/s. The test atmosphere was room air at temperatures of 25, 500, and 800 C and the test duration varied from 60 to 540 min. The use of the Au/Cr films reduced friction ... continued below

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13 p.

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Benoy, P.A. & DellaCorte, C. December 31, 1993.

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  • Benoy, P.A. Parks Coll. of St. Louis Univ., Cahokia, IL (United States)
  • DellaCorte, C. National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center

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Description

This paper describes research to evaluate the tribological properties of alumina pins sliding against thin sputtered gold films deposited on alumina disk substrates. A 250 {angstrom} thick chromium interlayer was first deposited onto the alumina test disks to enhance adhesion and high temperature wetting of the gold films. The Au/Cr films were tribotested in pure sliding in a pin-on-disk tribometer under a 4.9 N load at 1 m/s. The test atmosphere was room air at temperatures of 25, 500, and 800 C and the test duration varied from 60 to 540 min. The use of the Au/Cr films reduced friction by about a factor of two compared to the unlubricated alumina sliding couple. The coating prevented wear of the alumina substrate disks and reduced pin wear by one to two orders of magnitude. In addition, wear lives in excess of 200 000 sliding passes (9 hr) were observed during sliding at 800 C. Results suggest that these films show promise for the practical lubrication of many high temperature sliding components.

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13 p.

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OSTI as DE96007387

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  • International conference on metallurgical coatings and thin films, San Diego, CA (United States), 19-23 Apr 1993

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  • Other: DE96007387
  • Report No.: DOE/NASA--50306-3
  • Report No.: NASA-TM--106078;CONF-930419--7
  • Office of Scientific & Technical Information Report Number: 205588
  • Archival Resource Key: ark:/67531/metadc671609

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 31, 1993

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  • June 29, 2015, 9:42 p.m.

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  • Aug. 8, 2016, 8:54 p.m.

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Benoy, P.A. & DellaCorte, C. Tribological Characteristics of sputtered Au/Cr films on alumina substrates at elevated temperatures, article, December 31, 1993; United States. (digital.library.unt.edu/ark:/67531/metadc671609/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.