Elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness
By the particle-swarm optimization method, it is predicted that tetragonal P42mc, I41md, and orthorhombic Amm2 phases of vanadium nitride (VN) are energetically more stable than NaCl-type structure at 0 K. The enthalpies of the predicted three new VN phases, along with WC, NaCl, AsNi, CsCl type stru...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Institute of Physics Publishing Ltd.
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/30923 |
| _version_ | 1848753229956907008 |
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| author | Chun-Ying, P. Da-Wei, Z. Dai-Xiao, B. Cheng, L. Xi-Lian, J. Tai-Chao, S. Zhang, Feiwu |
| author_facet | Chun-Ying, P. Da-Wei, Z. Dai-Xiao, B. Cheng, L. Xi-Lian, J. Tai-Chao, S. Zhang, Feiwu |
| author_sort | Chun-Ying, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | By the particle-swarm optimization method, it is predicted that tetragonal P42mc, I41md, and orthorhombic Amm2 phases of vanadium nitride (VN) are energetically more stable than NaCl-type structure at 0 K. The enthalpies of the predicted three new VN phases, along with WC, NaCl, AsNi, CsCl type structures, are calculated each as a function of pressure. It is found that VN exhibits the WC-to-CsCl type phase transition at 256 GPa. For the considered seven crystallographicVN phases, the structures, elastic constants, bulk moduli, shear moduli, and Debye temperatures are investigated. Our calculated equilibrium structural parameters are in very good agreement with the available experimental results and the previous theoretical results for the NaCl phase. The Debye temperatures of VN predicted three novel phases, which are all higher than those of the remaining structures. The elastic constants, thermodynamic properties, and elastic anisotropiesof VN under pressure are obtained and the mechanical stabilities are analyzed in detail based on the mechanical stability criteria. Moreover, the effect of metallic bonding on the hardness of VN is also investigated, which shows that VNs in P42mc, I41md, and Amm2 phases are potential superhard phases. Further investigation on the experimental level is highly recommended to confirm our calculations presented in this paper. |
| first_indexed | 2025-11-14T08:21:12Z |
| format | Journal Article |
| id | curtin-20.500.11937-30923 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:21:12Z |
| publishDate | 2014 |
| publisher | Institute of Physics Publishing Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-309232019-02-19T05:35:23Z Elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness Chun-Ying, P. Da-Wei, Z. Dai-Xiao, B. Cheng, L. Xi-Lian, J. Tai-Chao, S. Zhang, Feiwu By the particle-swarm optimization method, it is predicted that tetragonal P42mc, I41md, and orthorhombic Amm2 phases of vanadium nitride (VN) are energetically more stable than NaCl-type structure at 0 K. The enthalpies of the predicted three new VN phases, along with WC, NaCl, AsNi, CsCl type structures, are calculated each as a function of pressure. It is found that VN exhibits the WC-to-CsCl type phase transition at 256 GPa. For the considered seven crystallographicVN phases, the structures, elastic constants, bulk moduli, shear moduli, and Debye temperatures are investigated. Our calculated equilibrium structural parameters are in very good agreement with the available experimental results and the previous theoretical results for the NaCl phase. The Debye temperatures of VN predicted three novel phases, which are all higher than those of the remaining structures. The elastic constants, thermodynamic properties, and elastic anisotropiesof VN under pressure are obtained and the mechanical stabilities are analyzed in detail based on the mechanical stability criteria. Moreover, the effect of metallic bonding on the hardness of VN is also investigated, which shows that VNs in P42mc, I41md, and Amm2 phases are potential superhard phases. Further investigation on the experimental level is highly recommended to confirm our calculations presented in this paper. 2014 Journal Article http://hdl.handle.net/20.500.11937/30923 10.1088/1674-1056/23/2/026201 Institute of Physics Publishing Ltd. fulltext |
| spellingShingle | Chun-Ying, P. Da-Wei, Z. Dai-Xiao, B. Cheng, L. Xi-Lian, J. Tai-Chao, S. Zhang, Feiwu Elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness |
| title | Elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness |
| title_full | Elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness |
| title_fullStr | Elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness |
| title_full_unstemmed | Elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness |
| title_short | Elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness |
| title_sort | elastic and thermodynamic properties of vanadium nitride under pressure and the effect of metallic bonding on its hardness |
| url | http://hdl.handle.net/20.500.11937/30923 |