Mechanochemical synthesis of Co3C carbide with carbon nanotubes
Nanoscaled (about 15 nm of size) metastable carbide Co<sub>3</sub>C was synthesized in a high-energy planetary ball mill by mechanical alloying of a mixture of powder cobalt (75 at. %) and multiwalled carbon nanotubes (CNT, 25 at. %). Phase transformation takes place at reaction milling...
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| Format: | Article |
| Language: | English |
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Vasyl Stefanyk Precarpathian National University
2019-04-01
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| Series: | Фізика і хімія твердого тіла |
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| Online Access: | http://journals.pu.if.ua/index.php/pcss/article/view/3519 |
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| author | O. I. Nakonechna M. M. Dashevski A. M. Kurylyuk N. M. Bilyavyna |
| author_facet | O. I. Nakonechna M. M. Dashevski A. M. Kurylyuk N. M. Bilyavyna |
| author_sort | O. I. Nakonechna |
| collection | DOAJ |
| description | Nanoscaled (about 15 nm of size) metastable carbide Co<sub>3</sub>C was synthesized in a high-energy planetary ball mill by mechanical alloying of a mixture of powder cobalt (75 at. %) and multiwalled carbon nanotubes (CNT, 25 at. %). Phase transformation takes place at reaction milling according to the reaction <em>hcp</em>-Co + CNT ® Co<sub>3</sub>C (reaction time is 120 - 220 min). The crystal structure of the Co<sub>3</sub>C carbide formed in the milling products was studied by X-ray diffraction method. It has revealed that the Co<sub>3</sub>C phase crystallizes in a Fe<sub>3</sub>C-type structure with <em>a</em> = 0.4982(3) nm, <em>b</em> = 0.6715(6) nm, <em>c</em> = 0.4457(7) nm, <em>Pnma</em> space group. The reliability factor <em>R<sub>B</sub></em> is equal to 0.065 for 48 reflections presented at diffraction pattern. It is found that the crystal structure of the Co<sub>3</sub>C carbide obtained by reaction milling of the Co-CNT charge is significantly internally deformed (distortion degree of the CCo<sub>6</sub> octahedron is 3.67 %) and contains the reduced interatomic Co-C distances (up to 0.188 nm). It was shown that the use of carbon nanotubes instead of graphite substantially reduces the duration of the Co<sub>3</sub>C carbide synthesis. |
| first_indexed | 2024-12-13T07:27:16Z |
| format | Article |
| id | doaj.art-e044ca2c6e1444449863f1a0f945bb84 |
| institution | Directory Open Access Journal |
| issn | 1729-4428 2309-8589 |
| language | English |
| last_indexed | 2024-12-13T07:27:16Z |
| publishDate | 2019-04-01 |
| publisher | Vasyl Stefanyk Precarpathian National University |
| record_format | Article |
| series | Фізика і хімія твердого тіла |
| spelling | doaj.art-e044ca2c6e1444449863f1a0f945bb842022-12-21T23:55:18ZengVasyl Stefanyk Precarpathian National UniversityФізика і хімія твердого тіла1729-44282309-85892019-04-01201131710.15330/pcss.20.1.173042Mechanochemical synthesis of Co3C carbide with carbon nanotubesO. I. Nakonechna0M. M. Dashevski1A. M. Kurylyuk2N. M. Bilyavyna3Київський національний університет імені Тараса Шевченкафізичний факультет Київського національного університету імені Тараса Шевченкафізичний факультет Київського національного університету імені Тараса Шевченкафізичний факультет Київського національного університету імені Тараса ШевченкаNanoscaled (about 15 nm of size) metastable carbide Co<sub>3</sub>C was synthesized in a high-energy planetary ball mill by mechanical alloying of a mixture of powder cobalt (75 at. %) and multiwalled carbon nanotubes (CNT, 25 at. %). Phase transformation takes place at reaction milling according to the reaction <em>hcp</em>-Co + CNT ® Co<sub>3</sub>C (reaction time is 120 - 220 min). The crystal structure of the Co<sub>3</sub>C carbide formed in the milling products was studied by X-ray diffraction method. It has revealed that the Co<sub>3</sub>C phase crystallizes in a Fe<sub>3</sub>C-type structure with <em>a</em> = 0.4982(3) nm, <em>b</em> = 0.6715(6) nm, <em>c</em> = 0.4457(7) nm, <em>Pnma</em> space group. The reliability factor <em>R<sub>B</sub></em> is equal to 0.065 for 48 reflections presented at diffraction pattern. It is found that the crystal structure of the Co<sub>3</sub>C carbide obtained by reaction milling of the Co-CNT charge is significantly internally deformed (distortion degree of the CCo<sub>6</sub> octahedron is 3.67 %) and contains the reduced interatomic Co-C distances (up to 0.188 nm). It was shown that the use of carbon nanotubes instead of graphite substantially reduces the duration of the Co<sub>3</sub>C carbide synthesis.http://journals.pu.if.ua/index.php/pcss/article/view/3519багатошарова вуглецева нанотрубка, кобальт, рентгенівська дифракція, механохімічний синтез |
| spellingShingle | O. I. Nakonechna M. M. Dashevski A. M. Kurylyuk N. M. Bilyavyna Mechanochemical synthesis of Co3C carbide with carbon nanotubes Фізика і хімія твердого тіла багатошарова вуглецева нанотрубка, кобальт, рентгенівська дифракція, механохімічний синтез |
| title | Mechanochemical synthesis of Co3C carbide with carbon nanotubes |
| title_full | Mechanochemical synthesis of Co3C carbide with carbon nanotubes |
| title_fullStr | Mechanochemical synthesis of Co3C carbide with carbon nanotubes |
| title_full_unstemmed | Mechanochemical synthesis of Co3C carbide with carbon nanotubes |
| title_short | Mechanochemical synthesis of Co3C carbide with carbon nanotubes |
| title_sort | mechanochemical synthesis of co3c carbide with carbon nanotubes |
| topic | багатошарова вуглецева нанотрубка, кобальт, рентгенівська дифракція, механохімічний синтез |
| url | http://journals.pu.if.ua/index.php/pcss/article/view/3519 |
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