| 2006 №11 (11) | 2006 №11 (02) |
The Paton Welding Journal, 2006, #11, 2-8 pages
Application of nano-structured materials for diffusion bonding of heat-resistant nickel alloys
K.A. Yushchenko, B.A. Zadery, A.V. Zvyagintseva, T.N. Kushnaryova, V.S. Nesmikh, E.P. Polishchuk, V.S. Savchenko
E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Whenjoining structure-oriented or single-crystal heat-resistant nickel alloys, to maintain their performance it is necessary to retain as much as possible the structural and crystallographic orientation of the initial material in a resulting joint, which can be achieved by solid-state joining, e.g. diffusion bonding. The study considers the possibility of using for diffusion bonding a binding film of nano-structured crystalline monoliths of intermetallics Ni3Al and NiAl3, produced by the super-rapid solidification method, as well as an intermediate multi-layer film consisting of individual layers of nickel and aluminium, produced by vapour phase deposition. It is established that the presence of an intermediate layer allows intensifying the process of diffusion bonding of nickel alloys.
Keywords: diffusion bonding, nickel alloy, multi-layer films, nano-crystalline films, intermetallics, bond, structural state, diffusion of elements
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