Zhou, C. ; Gao, X. ; Xu, Y. ; Buntkowsky, G. ; Ikuhara, Y. ; Riedel, R. ; Ionescu, E. (2015)
Synthesis and high-temperature evolution of single-phase amorphous Si–Hf–N ceramics.
In: Journal of the European Ceramic Society, 35 (7)
doi: 10.1016/j.jeurceramsoc.2015.01.026
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Novel amorphous polymer-derived Si–Hf–N ceramics were prepared via ammonolysis of single-source precursors which were synthesized by the chemical reaction of a commercially available perhydropolysilazane (PHPS) with different amounts of tetrakis(dimethylamido) hafnium(IV) (TDMAH). The prepared Si–Hf–N materials were annealed in nitrogen atmosphere at different temperatures ranging from 1100 °C to 1800 °C and investigated with respect to their chemical composition, crystallization behavior and phase evolution. The single-source precursors converted upon heat treatment in ammonia environment at 1000 °C into amorphous single-phase ceramics and remained amorphous even after annealing at 1400 °C in nitrogen atmosphere. Electron microscopy investigation showed that the annealing of the highly homogeneous single-phase Si–Hf–N induces local enrichment (clustering) of Hf, leading to amorphous HfN/SiNx nanocomposites. Annealing in nitrogen at 1600 °C leads to the crystallization of HfN and Si3N4. The results of the present work emphasize a convenient preparative access to silicon–metal–nitride nanocomposites from suitable single-source precursors.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Zhou, C. ; Gao, X. ; Xu, Y. ; Buntkowsky, G. ; Ikuhara, Y. ; Riedel, R. ; Ionescu, E. |
| Art des Eintrags: | Bibliographie |
| Titel: | Synthesis and high-temperature evolution of single-phase amorphous Si–Hf–N ceramics |
| Sprache: | Englisch |
| Publikationsjahr: | Juli 2015 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 35 |
| (Heft-)Nummer: | 7 |
| DOI: | 10.1016/j.jeurceramsoc.2015.01.026 |
| Kurzbeschreibung (Abstract): | Novel amorphous polymer-derived Si–Hf–N ceramics were prepared via ammonolysis of single-source precursors which were synthesized by the chemical reaction of a commercially available perhydropolysilazane (PHPS) with different amounts of tetrakis(dimethylamido) hafnium(IV) (TDMAH). The prepared Si–Hf–N materials were annealed in nitrogen atmosphere at different temperatures ranging from 1100 °C to 1800 °C and investigated with respect to their chemical composition, crystallization behavior and phase evolution. The single-source precursors converted upon heat treatment in ammonia environment at 1000 °C into amorphous single-phase ceramics and remained amorphous even after annealing at 1400 °C in nitrogen atmosphere. Electron microscopy investigation showed that the annealing of the highly homogeneous single-phase Si–Hf–N induces local enrichment (clustering) of Hf, leading to amorphous HfN/SiNx nanocomposites. Annealing in nitrogen at 1600 °C leads to the crystallization of HfN and Si3N4. The results of the present work emphasize a convenient preparative access to silicon–metal–nitride nanocomposites from suitable single-source precursors. |
| Freie Schlagworte: | Polymer-derived ceramic, Silicon–hafnium–nitride ceramic, Nanocomposite, Silicon nitride, Hafnium nitride |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 10 Mär 2015 08:33 |
| Letzte Änderung: | 10 Mär 2015 08:33 |
| PPN: | |
| Sponsoren: | The authors acknowledge the financial support from European Commission through the Marie-Curie ITN project “Functional Nitrides for Energy Applications, FUNEA” (FP7-PITN-GA-2010-264873)., A part of this study was also supported by the Joint Research Project between Japan (JSPS—Japan Society for the Promotion of Science) and Germany (DAAD—German Academic Exchange Service) through Bilateral Program. , YX and GB gratefully acknowledge financial support by the Deutsche Forschungsgemeinschaft. CZ acknowledges financial support from China Scholarship Council (CSC) during his stay at TU Darmstadt. |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum