Yu, Zhaoju ; Yang, Le ; Min, Hao ; Zhang, Pei ; Liu, Anhua ; Riedel, Ralf (2015)
High-ceramic-yield precursor to SiC-based ceramic: A hyperbranched polytitaniumcarbosilane bearing self-catalyzing units.
In: Journal of the European Ceramic Society, 35 (2)
doi: 10.1016/j.jeurceramsoc.2014.09.009
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A novel hyperbranched polytitaniumcarbosilane (HPTiCS) was synthesized by a monomer route. The obtained HPTiCS contains dicyclopentadienyl titanium units, which exhibits excellent self-catalytic activation of the dehydrocoupling reaction during its cross-linking process. As a result, the 1200 °C ceramic yield of the pyrolyzed HPTiCS is 32 wt% higher than that of titanium-free hyperbranched hydridopolycarbosilane (HPCS). Compared with titanium-free HPCS-derived SiC, the resulting HPTiCS-derived SiC-based ceramic exhibits a significantly enhanced resistance toward the growth of the in situ formed β-SiC crystals as the matrix phase after being annealed at 1600 °C.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Yu, Zhaoju ; Yang, Le ; Min, Hao ; Zhang, Pei ; Liu, Anhua ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | High-ceramic-yield precursor to SiC-based ceramic: A hyperbranched polytitaniumcarbosilane bearing self-catalyzing units |
| Sprache: | Englisch |
| Publikationsjahr: | Februar 2015 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 35 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1016/j.jeurceramsoc.2014.09.009 |
| Kurzbeschreibung (Abstract): | A novel hyperbranched polytitaniumcarbosilane (HPTiCS) was synthesized by a monomer route. The obtained HPTiCS contains dicyclopentadienyl titanium units, which exhibits excellent self-catalytic activation of the dehydrocoupling reaction during its cross-linking process. As a result, the 1200 °C ceramic yield of the pyrolyzed HPTiCS is 32 wt% higher than that of titanium-free hyperbranched hydridopolycarbosilane (HPCS). Compared with titanium-free HPCS-derived SiC, the resulting HPTiCS-derived SiC-based ceramic exhibits a significantly enhanced resistance toward the growth of the in situ formed β-SiC crystals as the matrix phase after being annealed at 1600 °C. |
| Freie Schlagworte: | Polymer-derived ceramic, Preceramic polymer, Hyperbranched polycarbosilane, Silicon carbide |
| 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: | 08 Jan 2015 09:25 |
| Letzte Änderung: | 08 Jan 2015 09:25 |
| PPN: | |
| Sponsoren: | This research was supported by the NSFC (no. 50802079) and Natural Science Foundation of Fujian Province of China (no. 2011J01330), and Scientific and Technological Innovation Platform of Fujian Province (no. 2006L2003). |
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