Thermodynamics of copper-nickel alloys containing aluminum, silicon, titanium, and chromium relative to their use in ceramic brazing

Technical Report · Thu Nov 01 00:00:00 EST 1984

DOI:https://doi.org/10.2172/6243874· OSTI ID:6243874

Williams, R O

By varying the copper-to-nickel ratio the activity coefficients of Al, Si, Ti, and Cr can be varied over a wide range. Thus to a degree one can tailor the behavior of such alloys for usefulness in brazing ceramics. Further, considerable amounts of these active elements can be present while the ability of carbon to reduce the surface oxide film in a high-vacuum system is retained. The critical aluminum concentrations required to prevent the formation of SiO/sub 2/, TiO, or Cr/sub 2/O/sub 3/ by reaction with Al/sub 2/O/sub 3/ are calculated. The simultaneous presence of the four active additions will presumably promote wetting without making the surface deoxidation more difficult.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6243874
• Report Number(s): ORNL-6072; ON: DE85004787
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BRAZING ALLOYS
CERAMICS
ALUMINIUM ADDITIONS
BRAZING
CHROMIUM ADDITIONS
COPPER ALLOYS
NICKEL ALLOYS
SILICON ADDITIONS
TITANIUM ADDITIONS
WETTABILITY
ALLOYS
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
FABRICATION
JOINING
SILICON ALLOYS
TITANIUM ALLOYS
WELDING
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication