In situ synthesis of cobalt and cobalt carbide nanostructures using decomposition of cobalt acetate
| Autor: | S.S. Kalyan Kamal, N.V. Rama Rao, J. Vimala, A. Pavan Kumar, Biswakes Majumdar, L. Durai, Partha Ghosal |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Nanostructure Materials science Mechanical Engineering Metals and Alloys Analytical chemistry chemistry.chemical_element Spark plasma sintering 02 engineering and technology Coercivity Cubic crystal system equipment and supplies 021001 nanoscience & nanotechnology 01 natural sciences Decomposition Magnetization chemistry Mechanics of Materials Phase (matter) 0103 physical sciences Materials Chemistry 0210 nano-technology Cobalt |
| Zdroj: | Journal of Alloys and Compounds. 748:814-817 |
| ISSN: | 0925-8388 |
| Popis: | A green chemical route is reported for the synthesis of cobalt and cobalt carbide nanostructures using decomposition of cobalt acetate salt in a carbon matrix in situ during spark plasma sintering (SPS). The effect of SPS pressure on the phase formation was studied in detail and it revealed that with increase in pressure from 30 to 60 MPa the interaction between Co and C atoms increases resulting in the formation of only pure face centered cubic Co at 30 MPa to predominantly Co2C phase at 60 MPa. The magnetization measurements revealed a decrease in magnetization (M) value accompanied by an increase in coercivity (Hc) value with increase in pressure. For a sample with predominant Co2C phase a M value of 35 emu/g and Hc value of 786 Oe was obtained. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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