Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102381
Title: Anomalous electrical conductivity in rapidly crystallized Cu100-xZrx (x = 50-66.6) alloys
Authors: Uporov, S. A.
Estemirova, S. K.
Chtchelkatchev, N. M.
Ryltsev, R. E.
Issue Date: 2015
Publisher: Elsevier Ltd
Citation: Anomalous electrical conductivity in rapidly crystallized Cu100-xZrx (x = 50-66.6) alloys / S. A. Uporov, S. K. Estemirova, N. M. Chtchelkatchev, et al. — DOI 10.1016/j.jallcom.2015.05.233 // Journal of Alloys and Compounds. — 2015. — Vol. 647. — P. 397-401.
Abstract: Cu100-xZrx (x = 50, 54, 60 and 66.6) polycrystalline alloys were prepared by arc-melting. The crystal structure of the ingots has been examined by X-ray diffraction. Non-equilibrium martensitic phases with monoclinic structure were detected in all the alloys except Cu33.4Zr66.6. Temperature dependencies of electrical resistivity in the temperature range of T = 4-300 K have been experimentally obtained as well as room temperature values of Hall coefficients and thermal conductivity. Electrical resistivity demonstrates anomalous behavior. At the temperatures lower than 20 K, their temperature dependencies are non-monotonous with pronounced minima. At elevated temperatures they have sufficiently non-linear character which cannot be described within framework of the standard Bloch-Grüneisen model. We show that experimental resistivity dependencies may be perfectly fitted by generalized Bloch-Grüneisen model with variable Debye temperature. We found that both the electrical resistivity and the Hall coefficients reveal metallic-type conductivity in the Cu-Zr alloys. The estimated values of both the charge carrier mobility and the phonon contribution to thermal and electric conductivity indicate the strong lattice defects and structure disorder. © 2015 Elsevier B.V.
Keywords: BLOCH-GRÜNEISEN MODEL
CU-ZR ALLOY
ELECTRICAL RESISTIVITY
GLASS-FORMING ALLOY
KONDO EFFECT
MARTENSITIC PHASE
BINARY ALLOYS
COPPER ALLOYS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
KONDO EFFECT
METAL CASTINGS
POLYCRYSTALLINE MATERIALS
THERMAL CONDUCTIVITY
X RAY DIFFRACTION
CU-ZR ALLOY
ELECTRICAL CONDUCTIVITY
ELEVATED TEMPERATURE
GLASS-FORMING ALLOYS
MARTENSITIC PHASE
MONOCLINIC STRUCTURES
POLYCRYSTALLINE ALLOYS
TEMPERATURE DEPENDENCIES
ZIRCONIUM ALLOYS
URI: http://hdl.handle.net/10995/102381
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84933574079
PURE ID: 333391
22fe1ad6-587c-4159-b10f-0c0fb20a2c93
ISSN: 9258388
DOI: 10.1016/j.jallcom.2015.05.233
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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