MICROSTRUCTURE AND FUNCTIONAL PROPERTIES OF MICRO- AND NANOSTRUCTURE METAL COMPOSITES OBTAINED BY DIFFUSION WELDING AND ROLLING OF MULTILAYER PACKEGES
Valery P. Korzhov, Michael I. Karpov
Pagini: 212-245
Publicat: 1 Jan 2011
Vizualizări: 126
Rezumat: Multilayered nanostructure composites of Cu/Fe, Cu/Nb, and Cu/(Nb/NbTi) with an 10 nm the average thickness of individual layers mechanical and superconducting properties which are implemented immediately after rolling, and micro- and nanostructure composites of Ni/Al, Ti/Ni, and (Cu/Nb)/Cu12Sn functional properties which, in contrast to the first, are manifested after rolling and heat treatment were investigated. Composites of (Cu/Nb)/Cu12Sn in final form were a multilayer tape of superconducting compound Nb3Sn. Welding of stacks carried by heat treatment under pressure and rolling mill in a vacuum with heating to 900-950 C and large (30%) compression in a single pass. The microstructure was investigated by scanning electron microscopy and X-ray analysis. For superconducting composites critical current density and upper critical magnetic field were measured. Shown that the pinning of superconducting vortices in alloys of NbTi are occurred at interlayer Nb- NbTi boundaries. Change in hardness and strength of multilayer composites under rolling deformation is described by the expression of the Hall-Petch relationship, in which instead of the grain size appeared thick of layers.
Cuvinte cheie: multilayered composite, micro- and nanostructure, nbti alloy, superconducting compound, rolling, heat treatment, the superconducting properties, hardn
Citează acest articol: Valery P. Korzhov, Michael I. Karpov. MICROSTRUCTURE AND FUNCTIONAL PROPERTIES OF MICRO- AND NANOSTRUCTURE METAL COMPOSITES OBTAINED BY DIFFUSION WELDING AND ROLLING OF MULTILAYER PACKEGES. Journal of International Scientific Publications: Materials, Methods & Technologies 5, 212-245 (2011). https://www.scientific-publications.net/en/article/1003333/
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