Title: Bonding sections of graphite
Authors: N . Bandyopadhyay
Addresses: The BOC Group Technical Center, 100 Mountain Avenue, Murray Hill, New Jersey, USA
Abstract: We have investigated various techniques for joining large sections of graphite which will be useful for the construction of graphite mandrels (tools) for the manufacture of fibre-reinforced composites. The effects of brazing alloy, brazing environment, joint design and metallized coating thickness on brazed joint integrity were studied. Graphite sections can be brazed directly using a titanium containing Ag-Cu-Ni brazing alloy under an argon or a hydrogen-containing furnace atmosphere, rather than under vacuum as previously practiced. The brazed joint showed excellent strength at room temperature as well as at elevated temverature. Graohite test oieces metallized with electroless nickel (coating thickness of 0.632 inches) and then subskquently brazed with conventional brazing alloy under inert or slightly reducing atmosphere also showed excellent joint integrity at room temperature as well as at elevated temperature
Keywords: graphite joining; electroless coating; flexural strength; graphite tooling; bonding sections; graphite mandrels; fibre-reinforced composites; brazing alloys; joint design; metallised coating thickness; joint integrity; titanium.
DOI: 10.1504/IJMPT.1989.036732
International Journal of Materials and Product Technology, 1989 Vol.4 No.3, pp.203 - 214
Published online: 06 Nov 2010 *
Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article