Preparation of high quality ferrovanadium nitride by carbothermal reduction nitridation process
High quality ferrovanadium nitride was prepared successfully by carbothermal reduction nitridation process by using V2O5 and Fe as the raw materials. The effects of reaction temperature and C/O molar ratio (content of O is defined as the oxygen in V2O5) on the quality of ferrovanadium nitri...
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University of Belgrade, Technical Faculty, Bor
2017-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2017/1450-53391700025W.pdf |
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| _version_ | 1832569855189975040 |
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| author | Wu Y.D. Zhang G.H. Chou K.C. |
| author_facet | Wu Y.D. Zhang G.H. Chou K.C. |
| author_sort | Wu Y.D. |
| collection | DOAJ |
| description | High quality ferrovanadium nitride was prepared successfully by carbothermal
reduction nitridation process by using V2O5 and Fe as the raw materials. The
effects of reaction temperature and C/O molar ratio (content of O is defined
as the oxygen in V2O5) on the quality of ferrovanadium nitride were
investigated in detail. It was demonstrated that C/O molar ratio had a great
influence on the residue carbon, as well as the nitrogen content in the final
products. It was found that the nitrogen content of the final product
achieved 11.52% when the C/O molar ratio was 90% of the stoichiometric value.
However, the nitrogen contents of the final products decreased with the
further increase of C/O molar ratio. For the temperature higher than 1773 K,
Fe became liquid phase and surrounded the solid V(C, N, O) particles tightly.
The formation of liquid Fe was beneficial for the further removal of oxygen
atoms left in the V(C, N, O) lattice, since it provided a liquid tunnel for
carbon diffusion which greatly enhanced the reaction kinetics. From the
results of X-ray diffraction (XRD) and thermodynamic calculations, phase
evolution sequence of V2O5 can be obtained as: V2O5→VO2→V2O3→V(C, N, O).
Moreover, the kinetic process from V2O3 to VN was studied and the results
shown that the reaction rate can be described by Jander diffusion model with
the extracted activation energy of 188.173 kJ/mol. |
| format | Article |
| id | doaj-art-2c304385162746ec9fd2ab9850b32b52 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-2c304385162746ec9fd2ab9850b32b522025-02-02T19:16:48ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752017-01-0153338339010.2298/JMMB170208025W1450-53391700025WPreparation of high quality ferrovanadium nitride by carbothermal reduction nitridation processWu Y.D.0Zhang G.H.1Chou K.C.2University of Science and Technology, State Key Laboratory of Advanced Metallurgy, Beijing, ChinaUniversity of Science and Technology, State Key Laboratory of Advanced Metallurgy, Beijing, ChinaUniversity of Science and Technology, State Key Laboratory of Advanced Metallurgy, Beijing, ChinaHigh quality ferrovanadium nitride was prepared successfully by carbothermal reduction nitridation process by using V2O5 and Fe as the raw materials. The effects of reaction temperature and C/O molar ratio (content of O is defined as the oxygen in V2O5) on the quality of ferrovanadium nitride were investigated in detail. It was demonstrated that C/O molar ratio had a great influence on the residue carbon, as well as the nitrogen content in the final products. It was found that the nitrogen content of the final product achieved 11.52% when the C/O molar ratio was 90% of the stoichiometric value. However, the nitrogen contents of the final products decreased with the further increase of C/O molar ratio. For the temperature higher than 1773 K, Fe became liquid phase and surrounded the solid V(C, N, O) particles tightly. The formation of liquid Fe was beneficial for the further removal of oxygen atoms left in the V(C, N, O) lattice, since it provided a liquid tunnel for carbon diffusion which greatly enhanced the reaction kinetics. From the results of X-ray diffraction (XRD) and thermodynamic calculations, phase evolution sequence of V2O5 can be obtained as: V2O5→VO2→V2O3→V(C, N, O). Moreover, the kinetic process from V2O3 to VN was studied and the results shown that the reaction rate can be described by Jander diffusion model with the extracted activation energy of 188.173 kJ/mol.http://www.doiserbia.nb.rs/img/doi/1450-5339/2017/1450-53391700025W.pdfferrovanadium nitridehigh-strength low-alloy steelV2O3kinetics |
| spellingShingle | Wu Y.D. Zhang G.H. Chou K.C. Preparation of high quality ferrovanadium nitride by carbothermal reduction nitridation process Journal of Mining and Metallurgy. Section B: Metallurgy ferrovanadium nitride high-strength low-alloy steel V2O3 kinetics |
| title | Preparation of high quality ferrovanadium nitride by carbothermal reduction nitridation process |
| title_full | Preparation of high quality ferrovanadium nitride by carbothermal reduction nitridation process |
| title_fullStr | Preparation of high quality ferrovanadium nitride by carbothermal reduction nitridation process |
| title_full_unstemmed | Preparation of high quality ferrovanadium nitride by carbothermal reduction nitridation process |
| title_short | Preparation of high quality ferrovanadium nitride by carbothermal reduction nitridation process |
| title_sort | preparation of high quality ferrovanadium nitride by carbothermal reduction nitridation process |
| topic | ferrovanadium nitride high-strength low-alloy steel V2O3 kinetics |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2017/1450-53391700025W.pdf |
| work_keys_str_mv | AT wuyd preparationofhighqualityferrovanadiumnitridebycarbothermalreductionnitridationprocess AT zhanggh preparationofhighqualityferrovanadiumnitridebycarbothermalreductionnitridationprocess AT choukc preparationofhighqualityferrovanadiumnitridebycarbothermalreductionnitridationprocess |