Fu, Yanqin ; Zhang, Yulei ; Yan, Hao ; Li, Jinhua ; Yin, Xuemin ; Sun, Jia ; Fu, Qiangang ; Riedel, Ralf (2023)
Microstructure and evolution of hafnium carbide whiskers via polymer-derived ceramics: A novel formation mechanism.
In: Journal of Advanced Ceramics, 12 (3)
doi: 10.26599/JAC.2023.9220706
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Polymer-derived ultra-high-temperature ceramic (UHTC) nanocomposites have attracted growing attention due to the increasing demands for advanced thermal structure components in aerospace. Herein, hafnium carbide (HfC) whiskers are successfully fabricated in carbon fiber preforms via the polymer-derived ceramic (PDC) method. A novel carbon nanotube (CNT) template growth mechanism combined with the PDC method is proposed in this work, which is different from the conventional vapor-liquid-solid (VLS) mechanism that is commonly used for polymer-derived nanostructured ceramics. The CNTs are synthesized and proved to be the templates for fabricating the HfC whiskers, which are generated by the released low-molecular-weight gas such as CO, CO2, and CH4 during the pyrolysis of a Hf-containing precursor. The formed products are composed of inner single crystal HfC whiskers that are measured to be several tens of micrometers in length and 100-200 nm in diameter and outer HfC/HfO2 particles. Our work not only proposes a new strategy to prepare the HfC whiskers, but also puts forward a new thinking of the efficient utilization of a UHTC polymer precursor.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Fu, Yanqin ; Zhang, Yulei ; Yan, Hao ; Li, Jinhua ; Yin, Xuemin ; Sun, Jia ; Fu, Qiangang ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Microstructure and evolution of hafnium carbide whiskers via polymer-derived ceramics: A novel formation mechanism |
| Sprache: | Englisch |
| Publikationsjahr: | März 2023 |
| Verlag: | SPRINGERONE NEW YORK PLAZA |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Advanced Ceramics |
| Jahrgang/Volume einer Zeitschrift: | 12 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.26599/JAC.2023.9220706 |
| Kurzbeschreibung (Abstract): | Polymer-derived ultra-high-temperature ceramic (UHTC) nanocomposites have attracted growing attention due to the increasing demands for advanced thermal structure components in aerospace. Herein, hafnium carbide (HfC) whiskers are successfully fabricated in carbon fiber preforms via the polymer-derived ceramic (PDC) method. A novel carbon nanotube (CNT) template growth mechanism combined with the PDC method is proposed in this work, which is different from the conventional vapor-liquid-solid (VLS) mechanism that is commonly used for polymer-derived nanostructured ceramics. The CNTs are synthesized and proved to be the templates for fabricating the HfC whiskers, which are generated by the released low-molecular-weight gas such as CO, CO2, and CH4 during the pyrolysis of a Hf-containing precursor. The formed products are composed of inner single crystal HfC whiskers that are measured to be several tens of micrometers in length and 100-200 nm in diameter and outer HfC/HfO2 particles. Our work not only proposes a new strategy to prepare the HfC whiskers, but also puts forward a new thinking of the efficient utilization of a UHTC polymer precursor. |
| Freie Schlagworte: | HfC whiskers; carbon nanotubes (CNTs); CNT template; Hf-containing precursor; thermal pyrolysis CARBON/CARBON COMPOSITES; ABLATION PERFORMANCE; PRECURSOR SYNTHESIS; CARBON NANOTUBES; TEMPERATURE; GROWTH; NANOWIRES |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 31 Mär 2023 09:30 |
| Letzte Änderung: | 04 Apr 2023 10:24 |
| PPN: | 506563138 |
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