Rapid mechanochemical synthesis of titanium and hafnium carbides
| Autor: | Vladimir Šepelák, B.P. Tolochko, S. A. Petrova, A. I. Ancharov, T. F. Grigor’eva, E. T. Devyatkina, T. A. Udalova, S. V. Vosmerikov, Nikolay Z. Lyakhov |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Carbide Hafnium law.invention Metal chemistry Chemical engineering Mechanics of Materials Transmission electron microscopy law visual_art visual_art.visual_art_medium General Materials Science Mechanosynthesis Crystallization 0210 nano-technology Ball mill Titanium |
| Zdroj: | Journal of Materials Science. 53:13584-13591 |
| ISSN: | 1573-4803 0022-2461 |
| Popis: | The mechanically triggered interactions in the Ti–C and Hf–C systems performed in a high-energy planetary ball mill are studied. The formation of carbides (TiC and HfC) in the course of mechanochemical synthesis at the different stages is followed by both conventional and synchrotron X-ray diffraction analyses and high-resolution scanning and transmission electron microscopy. The mechanism of the mechanochemically induced reactions in the Ti–C and Hf–C systems leading to the relatively rapid formation of TiC and HfC, respectively, is proposed. The interaction between metallic Ti (Hf) and C proceeds through the formation of mechanocomposites Ti/C (Hf/C) at the first stage, followed by the melting of titanium (hafnium), the spreading it over the carbon particle surface and the crystallization of titanium (hafnium) carbides. It is demonstrated that the mechanosynthesis of ultra-fine TiC and HfC is completed after 20 and 8 min of mechanical activation, respectively. |
| Databáze: | OpenAIRE |
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