Effect of high and low Nb content in multicomponent Nb–Ni–Ti–Zr–Co alloy on its structure, hardness and hydrogen permeability; Intermetallics; Vol. 166
| Parent link: | Intermetallics.— .— Amsterdam: Elsevier Science Publishing Company Inc. Vol. 166.— 2024.— Article number 108180, 9 p. |
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| Autor corporatiu: | |
| Altres autors: | , , , , , |
| Sumari: | Title screen In the present work, novel multicomponent Nb–Ni–Ti–Zr–Co alloys were synthesized by arc melting. Two alloys with low and high Nb contents and an equimolar high-entropy alloy (HEA) were produced and compared. The influence of the elemental composition on their microstructure, phase composition, lattice constants, hardness and hydrogen permeability was investigated. The synthesized Nb–Ni–Ti–Zr–Co alloys are characterized by near-equimolar BCC-(Nb, Ni, Ti, Zr, Co) and Nb-rich BCC-Nb(Ni, Ti, Zr, Co) phases. The equimolar Nb20Ni20Ti20Zr20Co20 alloy had the highest concentration of BCC-(Nb, Ni, Ti, Zr, Co) phase (84 vol %), while the Nb74Ni6Ti9Zr5Co6 alloy had the highest concentration of Nb-rich BCC phase (95 vol %). First-principles study of the lattice parameters for the Nb–Ni–Ti–Zr–Co alloy revealed that the lattice parameter of the BCC phase decreases with Ni and Co addition and increases with Nb, Zr addition. Titanium does not significantly affect the lattice constant of BCC phase for compositions close to equimolar (10–30 at. %). The microhardness of the alloys decreases with increasing Nb content, which is mainly due to the proportion of softer Nb-rich BCC phase and microstructural changes. The synthesized Nb15Ni20Ti15Zr30Co20 and Nb20Ni20Ti20Zr20Co20 alloys demonstrate high hydrogen permeability at 400 °C that makes them promising for hydrogen purification membranes. It is shown high-entropy Nb20Ni20Ti20Zr20Co20 alloy exhibit highest resistance to hydrogen embrittlement, while high Nb content alloys are strongly susceptible to embrittlement Текстовый файл AM_Agreement |
| Idioma: | anglès |
| Publicat: |
2024
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| Matèries: | |
| Accés en línia: | https://doi.org/10.1016/j.intermet.2023.108180 |
| Format: | Electrònic Capítol de llibre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=672169 |
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| 200 | 1 | |a Effect of high and low Nb content in multicomponent Nb–Ni–Ti–Zr–Co alloy on its structure, hardness and hydrogen permeability |f E. B. Kashkarov, L. A. Svyatkin, K. S. Gusev [et al.] | |
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| 300 | |a Title screen | ||
| 320 | |a References: 78 tit. | ||
| 330 | |a In the present work, novel multicomponent Nb–Ni–Ti–Zr–Co alloys were synthesized by arc melting. Two alloys with low and high Nb contents and an equimolar high-entropy alloy (HEA) were produced and compared. The influence of the elemental composition on their microstructure, phase composition, lattice constants, hardness and hydrogen permeability was investigated. The synthesized Nb–Ni–Ti–Zr–Co alloys are characterized by near-equimolar BCC-(Nb, Ni, Ti, Zr, Co) and Nb-rich BCC-Nb(Ni, Ti, Zr, Co) phases. The equimolar Nb20Ni20Ti20Zr20Co20 alloy had the highest concentration of BCC-(Nb, Ni, Ti, Zr, Co) phase (84 vol %), while the Nb74Ni6Ti9Zr5Co6 alloy had the highest concentration of Nb-rich BCC phase (95 vol %). First-principles study of the lattice parameters for the Nb–Ni–Ti–Zr–Co alloy revealed that the lattice parameter of the BCC phase decreases with Ni and Co addition and increases with Nb, Zr addition. Titanium does not significantly affect the lattice constant of BCC phase for compositions close to equimolar (10–30 at. %). The microhardness of the alloys decreases with increasing Nb content, which is mainly due to the proportion of softer Nb-rich BCC phase and microstructural changes. The synthesized Nb15Ni20Ti15Zr30Co20 and Nb20Ni20Ti20Zr20Co20 alloys demonstrate high hydrogen permeability at 400 °C that makes them promising for hydrogen purification membranes. It is shown high-entropy Nb20Ni20Ti20Zr20Co20 alloy exhibit highest resistance to hydrogen embrittlement, while high Nb content alloys are strongly susceptible to embrittlement | ||
| 336 | |a Текстовый файл | ||
| 371 | 0 | |a AM_Agreement | |
| 461 | 1 | |c Amsterdam |n Elsevier Science Publishing Company Inc. |t Intermetallics | |
| 463 | 1 | |d 2024 |t Vol. 166 |v Article number 108180, 9 p. | |
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a multicomponent alloys | |
| 610 | 1 | |a high-entropy alloys | |
| 610 | 1 | |a hydrogen separation membranes | |
| 610 | 1 | |a microstructure | |
| 610 | 1 | |a properties | |
| 610 | 1 | |a first principles calculations | |
| 701 | 1 | |a Kashkarov |b E. B. |c Physicist |c Associate Professor, Researcher of Tomsk Polytechnic University, Candidate of Physical and Mathematical Sciences |f 1991- |g Egor Borisovich |9 18267 | |
| 701 | 1 | |a Svyatkin |b L. A. |c physicist |c Associate Professor of Tomsk Polytechnic University, Candidate of Physical and Mathematical Sciences |f 1988- |g Leonid Aleksandrovich |9 17747 | |
| 701 | 1 | |a Gusev |b K. S. |c physicist |c Technician of Tomsk Polytechnic University |f 2001- |g Kirill Sergeevich |9 23019 | |
| 701 | 1 | |a Ognev |b S. O. |c Specialist in the field of nuclear technologies |c Engineer of Tomsk Polytechnic University |f 1999- |g Sergey Olegovich |9 22797 | |
| 701 | 1 | |a Koptsev |b M. |c physicist |c Engineer of Tomsk Polytechnic University |f 1994- |g Maksim |9 23020 | |
| 701 | 1 | |a Terentjeva |b D. V. |c physicist |c Engineer of Tomsk Polytechnic University |f 1999- |g Darjya Vitaljevna |y Tomsk |9 88521 | |
| 712 | 0 | 2 | |a National Research Tomsk Polytechnic University |c (2009- ) |9 27197 |
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