Synthesis of single-phase high-entropy carbide powders
| Autor: | Yue Zhou, Gregory E. Hilmas, Lun Feng, William G. Fahrenholtz |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metals and Alloys chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ultra-high-temperature ceramics Carbide Transition metal Chemical engineering chemistry Mechanics of Materials Carbothermic reaction 0103 physical sciences engineering General Materials Science Particle size 0210 nano-technology Ball mill Carbon Solid solution |
| Zdroj: | Scripta Materialia. 162:90-93 |
| ISSN: | 1359-6462 |
| Popis: | High-entropy carbide powders were produced by a two-step synthesis process consisting of carbothermal reduction followed by solid solution formation. Nominally pure (Hf,Zr,Ti,Ta,Nb)C in a single-phase rock salt structure had an average particle size of about 550 nm and an oxygen content of 0.2 wt%. The fine particle size was due to the use of high-energy ball milling prior to carbothermal reduction combined with the relatively low synthesis temperature of 1600 °C. Oxygen content was minimized by completion of the carbothermal reduction reactions under vacuum. This is the first report of synthesizing a high-entropy carbide powder using individual transition metal oxides and carbon as precursors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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