Fabrication of Tantalum and Hafnium Carbide Fibers via ForcespinningTM for Ultrahigh-Temperature Applications
| Autor: | James R. Nicholas, Nelson S. Bell, Marissa Ringgold, LaRico J. Treadwell, Harold O. Lee, Avi G. Bregman, Patricia H. Caraballa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Article Subject General Engineering Energy-dispersive X-ray spectroscopy Tantalum chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Hafnium Carbide law.invention chemistry Chemical engineering law 0103 physical sciences TA401-492 General Materials Science Chemical stability Calcination Fiber 0210 nano-technology Materials of engineering and construction. Mechanics of materials Powder diffraction |
| Zdroj: | Advances in Materials Science and Engineering, Vol 2021 (2021) |
| ISSN: | 1687-8434 |
| DOI: | 10.1155/2021/6672746 |
| Popis: | In this work, a novel method for producing ultrafine tantalum and hafnium carbide fibers using the ForcespinningTM technique via a nonhalide-based sol-gel process was investigated. An optimal solution viscosity range was systematically determined via rheological studies of neat PAN/DMF as a function of fiber formation. Subsequently, ForcespinningTM parameters were also systemically studied to determine the optimal rotational velocity and spinneret-to-collecting rod distance required for ideal fiber formation. TaC and HfC fibers were synthesized via ForcespinningTM utilizing a mixture of PAN and refractory transition metal alkoxides (i.e., tantalum (V) ethoxide and hafnium (IV) tert-butoxide) in DMF solution based on optimal conditions determined from the neat PAN/DMF. In all instances after calcination, powder X-ray diffraction (PXRD) and energy dispersive spectroscopy (EDS) indicated that TaC and HfC fibers were produced. TGA/DSC confirmed the chemical stability of the resulting fibers. |
| Databáze: | OpenAIRE |
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