High-ceramic-yield precursor to SiC-based ceramic: A hyperbranched polytitaniumcarbosilane bearing self-catalyzing units. Issue 2 (February 2015)

• Record Type: Journal Article
• Authors: Yu, Zhaoju; Yang, Le; Min, Hao; Zhang, Pei; Liu, Anhua; Riedel, Ralf
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 2(2015:Feb.)
• Page Start: 851
• Page End: 858
• Publication Date: 2015-02
• Subjects: Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2014.09.009
• Languages: English
• ISSNs: 0955-2219

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <p id="spar0005">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.</p> </sec> </abstract>