Characterization and microstructural evolution of SiC(OAl) fibers to SiC(Al) fibers derived from aluminum-containing polycarbosilane

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	Characterization and microstructural evolution of SiC(OAl) fibers to SiC(Al) fibers derived from aluminum-containing polycarbosilane
	Yu, Y. X. ; Tang, X. Y. ; Li, X. D. ; Yu YX(余煜玺)
刊名	http://dx.doi.org/10.1016/j.compscitech.2008.02.010
	2008-06
关键词	SILICON-CARBIDE FIBER AL-C-O SINTERED SIC FIBER LOW-OXYGEN-CONTENT CERAMIC FIBERS HIGH-TEMPERATURE HI-NICALON PYROLYSIS PRECURSOR STRENGTH
英文摘要	The SiC(OAl) fibers and the SiC(Al) fibers were fabricated by the use of aluminum-containing polycarbosilane (Al-PCS) precursor. The two types of fibers have been characterized. Chemical element analysis, AES, SEM, XRD, RMS and NMR have been employed. The chemical formula of SiC(OAl) fibers is SiC1.31O0.25Al0.018 with C and O rich on the surface. The microstructure of SiC(OAl) fibers is a mixture of beta-SiC nanocrystals, free carbon, and an amorphous silicon oxycarbide (Si-C-O phase), which have been confirmed by an amount Of SiC2O2, SiCO3, SiO4 and SiC3O units in the Si-29 MAS NMR spectrum. A small quantity of aluminum is embedded uniformly in the Si-C-O amorphous continuous phase. For SiC(Al) fibers, nearly stoichiometric composition was confirmed as chemical composition Of SiC1.03O0.013Al0.024. The fiber is composed of a large number of beta-SiC crystallites, a small amount of alpha-SiC crystalline and SiC amorphous phase. The aluminum in the SiC(Al) fibers mainly exists in two manners: Al-C bonds connected with the surfaces of the beta-SiC grains and Al-O bonds, or Al2O3, to the amorphous phase. (c) 2008 Elsevier Ltd. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/59043]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Yu, Y. X.,Tang, X. Y.,Li, X. D.,et al. Characterization and microstructural evolution of SiC(OAl) fibers to SiC(Al) fibers derived from aluminum-containing polycarbosilane[J]. http://dx.doi.org/10.1016/j.compscitech.2008.02.010,2008.
APA	Yu, Y. X.,Tang, X. Y.,Li, X. D.,&余煜玺.(2008).Characterization and microstructural evolution of SiC(OAl) fibers to SiC(Al) fibers derived from aluminum-containing polycarbosilane.http://dx.doi.org/10.1016/j.compscitech.2008.02.010.
MLA	Yu, Y. X.,et al."Characterization and microstructural evolution of SiC(OAl) fibers to SiC(Al) fibers derived from aluminum-containing polycarbosilane".http://dx.doi.org/10.1016/j.compscitech.2008.02.010 (2008).