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), pp. 851-858. Elsevier Science Publishing, ISSN 09552219,
[Article]
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2015 |
| Creators: | Yu, Zhaoju ; Yang, Le ; Min, Hao ; Zhang, Pei ; Liu, Anhua ; Riedel, Ralf |
| Title: | High-ceramic-yield precursor to SiC-based ceramic: A hyperbranched polytitaniumcarbosilane bearing self-catalyzing units |
| Language: | English |
| 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. |
| Journal or Publication Title: | Journal of the European Ceramic Society |
| Volume of the journal: | 35 |
| Issue Number: | 2 |
| Publisher: | Elsevier Science Publishing |
| Uncontrolled Keywords: | Polymer-derived ceramic, Preceramic polymer, Hyperbranched polycarbosilane, Silicon carbide |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 08 Jan 2015 09:25 |
| URL / URN: | http://dx.doi.org/10.1016/j.jeurceramsoc.2014.09.009 |
| Identification Number: | doi:10.1016/j.jeurceramsoc.2014.09.009 |
| PPN: | |
| Funders: | 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). |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Send an inquiry |
Options (only for editors)
 |
Show editorial Details |
Drucken
Impressum