Crystal structure and electrical resistance of Ni-W alloys
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Crystal structure and electrical resistance of Ni-W alloys
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| Creator |
Derevyanko, V.V.
Sunhurov, M.S. Sukhareva, T.V. Finkel, V.A. Shakhov, Yu.N. |
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| Subject |
Characterization and properties
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| Description |
The purpose of the paper is to establish the correlation between chemical composition, phase content and magnetic ordering of Ni₍₁₋x₎Wx alloys and behavior of their electronic properties in a wide range of temperatures. Alloys Ni₍₁₋x₎Wx of different composition (0 < x < 0.5) are synthesized. It is studied the crystal structure and the nature of the temperature dependence of electrical resistivity. It is shown, that in the range of concentrations of tungsten 0 < x < ~0.15 there is only face centered cubic (FCC) lattice, whereas, at the higher values of x, the Ni-W alloy is two-phase system consisting of the face centered and body centered cubic (BCC) crystal structures. The strong drop in residual resistivity ratio (RRR) with increasing of x in the ferromagnetic area of single-phase FCC alloy, the weak dependence of RRR in the paramagnetic area of the FCC alloy, and growth of RRR in the two-phase region (FCC + BCC) of Ni-W are observed. It is established, that in the two-phase region of the alloy at concentrations of ~0.15 < x < 0.3 the electric current flows through the matrix of FCC Ni-W. At the higher concentrations of tungsten (x≥~0.3) the mechanism of charge transfer changes: electric current flows through percolation channels, formed by BCC phase of Ni-W system.
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| Date |
2019-06-15T06:39:32Z
2019-06-15T06:39:32Z 2018 |
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| Type |
Article
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| Identifier |
Crystal structure and electrical resistance of Ni-W alloys / V.V. Derevyanko, M.S. Sunhurov, T.V. Sukhareva, V.A. Finkel, Yu.N. Shakhov // Functional Materials. — 2018. — Т. 25, № 1. — С. 48-53. — Бібліогр.: 14 назв. — англ.
1027-5495 doi:https://doi.org/10.15407/fm25.01.048 http://dspace.nbuv.gov.ua/handle/123456789/154070 |
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| Language |
en
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| Relation |
Functional Materials
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| Publisher |
НТК «Інститут монокристалів» НАН України
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