Universität zu Köln

Kaur, Sarabjeet, Mera, Gabriela ORCID: 0000-0002-9325-8769, Riedel, Ralf ORCID: 0000-0001-6888-7208 and Ionescu, Emanuel ORCID: 0000-0002-3266-3031 (2016). Effect of boron incorporation on the phase composition and high-temperature behavior of polymer-derived silicon carbide. J. Eur. Ceram. Soc., 36 (4). S. 967 - 978. OXFORD: ELSEVIER SCI LTD. ISSN 1873-619X

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Abstract

Within the present work, boron-containing silicon carbide (SiBC) powders and monoliths were prepared from a polyborocarbosilane. The main aspect addressed here relates to the fate of boron in the prepared SiBC ceramics, which has not been clarified unambiguously so far. X-ray diffraction data, corroborated with XPS, FTIR and Raman spectroscopic results indicate that boron preferably gets incorporated within the segregated carbon phase present in polycarbosilane-derived SiC; thus, the prepared SiBC samples show dispersed boron-containing carbon phases with boron contents from ca. 9 to 18 at%. Interestingly, the B-containing carbon phase does not convert into crystalline boron carbide, even upon annealing at very high temperatures and despite the high boron content. Moreover, processing details concerning the pressureless preparation of dense Si(B)C monoliths are considered in the present paper and their high temperature evolution is analyzed. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kaur, Sarabjeet UNSPECIFIED UNSPECIFIED UNSPECIFIED Mera, Gabriela UNSPECIFIED orcid.org/0000-0002-9325-8769 UNSPECIFIED Riedel, Ralf UNSPECIFIED orcid.org/0000-0001-6888-7208 UNSPECIFIED Ionescu, Emanuel UNSPECIFIED orcid.org/0000-0002-3266-3031 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-283918
DOI:	10.1016/j.jeurceramsoc.2015.11.037
Journal or Publication Title:	J. Eur. Ceram. Soc.
Volume:	36
Number:	4
Page Range:	S. 967 - 978
Date:	2016
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1873-619X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GRAPHITE-LIKE MATERIAL; X-RAY-DIFFRACTION; RAMAN-SPECTRA; SIC CERAMICS; AMORPHOUS-CARBON; SPECTROSCOPY; GRAPHITIZATION; CONVERSION; PRECURSOR; OXIDATION Multiple languages Materials Science, Ceramics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28391