Final report for Grant DE-FG02-97ER45655

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Studies were performed of the Au/SiC interface, as well as the interfaces between SiC and several Au alloys. A contact angle of 133{+-}1{sup o} for pure Au on SiC was obtained after equilibration at 800 C. Au containing 3at%Sn was studied, and wetting was improved as evidenced by a decrease in contact angle from 133{sup o} for pure Au to 117{sup o} for the Au-Sn alloy. Sn segregation was observed at the surface of Au. Measurements were also performed on Au-Ge alloys. It was found that the contact angle is decreased to 115{sup o} and 107{sup o} at Ge concentrations ... continued below

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3 p.

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Wynblatt, Paul April 25, 2001.

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Description

Studies were performed of the Au/SiC interface, as well as the interfaces between SiC and several Au alloys. A contact angle of 133{+-}1{sup o} for pure Au on SiC was obtained after equilibration at 800 C. Au containing 3at%Sn was studied, and wetting was improved as evidenced by a decrease in contact angle from 133{sup o} for pure Au to 117{sup o} for the Au-Sn alloy. Sn segregation was observed at the surface of Au. Measurements were also performed on Au-Ge alloys. It was found that the contact angle is decreased to 115{sup o} and 107{sup o} at Ge concentrations of 1 and 2 at%, respectively. Studies of Au containing a low concentration of Si ({approx}0.5 at%) were conducted and showed a decrease in contact angle from 133{sup o} to 107{sup o}. The equilibrium crystal shape of Au was determined. Results showed that the presence of C at the Au surface has a measurable effect on the anisotropy of surface energy. Finally, the wetting of graphite by Pb(Ni) alloys was investigated. The results showed that contact angles of 100{sup o} and 80{sup o} coexist in the vicinity of the limit of solubility of Ni in Pb ({approx}0.17%Pb), without intermediate contact angles being present.

Physical Description

3 p.

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OSTI as DE00808743

Medium: P; Size: 3 pages

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  • Other Information: PBD: 25 Apr 2001

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  • Report No.: DOE/ER/45655-1
  • Grant Number: FG02-97ER45655
  • DOI: 10.2172/808743 | External Link
  • Office of Scientific & Technical Information Report Number: 808743
  • Archival Resource Key: ark:/67531/metadc739337

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Office of Scientific & Technical Information Technical Reports

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

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  • April 25, 2001

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • April 10, 2017, 7:23 p.m.

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Wynblatt, Paul. Final report for Grant DE-FG02-97ER45655, report, April 25, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc739337/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.