| Manipulating the structure and morphology of Cobalt-Boron nano-particles through a chemical approach |
| Paper ID : 2033-UFGNSM13-FULL (R1) |
| Authors: |
|
Hooman Sabarou *1, abolghasem ataie2 1University of Tehran-Faculty of Engineering- School of Metallurgy and Materials Engineering 2School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran |
| Abstract: |
| Cobalt-boron nano-particles have been synthesized by a chemical reaction between NaBH4 and CoCl2.6H2O through manipulating pH value of the reaction mixture. The morphology, structure, phase composition, and thermal behavior have been examined via FESEM, TEM, XRD, EDS, and DSC techniques, respectively. It is demonstrated that the morphology and structure of ultimate nano-particles completely depends on the pH value of reaction mixture. While the neutral pH value favors the smallest nano-particles with a mean particle size of 50 nm and complete amorphous structure, the acidic condition promotes the growth process and the crystal structure. Furthermore, these nano-particles transform into cobalt nano-crystallites after heated at 600ºC, and retained the discrepancies in the morphology and the structure of the parent cobalt-boron nano-particles. A detailed characterization of the nano-particulates, discussions on the synthesis mechanism and subsequent formation transformation have been provided. |
| Keywords: |
| nanostructured materials, chemical synthesis, electron microscopy, amorphous materials |
| Status : Paper Accepted (Poster Presentation) |
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