文献类型：期刊文献

英文题名：Oxidation behavior of carbon materials derived from a carborane- and silicon-incorporated polymer

作者：Wang, Canfeng[1];Huang, Farong[1];Jiang, Yun[1];Li, Junfei[1];Zhou, Yan[1];Du, Lei[1]

机构：[1]E China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：38

期号：4

起止页码：3081

外文期刊名：CERAMICS INTERNATIONAL

收录：;EI(收录号：20121114862365);WOS:【SCI-EXPANDED(收录号:WOS:000302522700065)】；

基金：We gratefully acknowledged the financial supports from the National Basic Research Program of China (Grant No. xx20303), the Shanghai Leading Academic Discipline Projects (B502) and Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application (Soochow University).

语种：英文

外文关键词：Polymer precursor; Carbon material; Borosilicate layer; Oxidation resistance

摘要：The oxidation behavior and oxidation mechanism of carbon materials containing silicon and boron elements (C-Si-B materials) were investigated at different high temperatures in air. The carbon materials were prepared by oxidative pyrolysis of the polymer precursor, carborane-incorporated poly(dimethylsilylene-ethynylenephenyleneethynylene) (CB-PSEPE), at 800, 1000, or 1200 degrees C for 1 h under static air. Homogeneous dispersion of silicon and boron components in the carbon matrix could be achieved in the carbon materials after the pyrolysis. The oxidation behavior of the C-Si-B materials during the oxidation process was studied. The evolution of elemental composition and morphology of the surface layers of carbon materials was monitored by X-ray photoelectron spectroscopy and scanning electron microscopy, respectively. The results imply that the formation of protective borosilicate layer in the surface is the main mechanism to provide remarkable oxidation resistance of the carbon materials. The obtained borosilicate layer with a self-healing property can withstand oxidation at 1000 degrees C in air. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.