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Brazing Alloys
Gold–based brazing alloys are used in industrial brazing, offering improved resistance to oxidation, good mechanical properties of joints at elevated temperatures, and excellent corrosion resistance in challenging environments, when compared to base metal alloys. Of course, due to cost, these alloys tends to be limited to high value applications. Alloys that contain around nickel-gold alloys (20 wt % gold) with the balance made up of chromium, iron and silicon, were developed for the assembly of space shuttle engines as alternatives to conventional nickel-based brazes. The addition of palladium to gold alloys further improves resistance to oxidation at elevated temperatures, as well as the strength of the alloys. These materials are used mostly for joining superalloy and metal components that need to operate in relatively aggressive environments eg jet engines. These alloys can have melting temperatures that reach up to 1200 °C. For more in-depth information on brazing and joining visit the archive of Gold Bulletin. |
![]() The blog that crosses the boundaries between research and the industrial application of gold technology ACS Fall meeting25 Aug, 2010 Inbetween meetings yesterday I managed to attend a few lectures here in (an extremely rainy!) Boston. Vince Rotello of UMass and Richard Lambert of Cambridge delivered the 2010 Langmuir lectures, both of which were excellent. Other interesting talks included Jin Zhang of UC Santa Cruz discussing his group’s work in the field of solar cell [...] |