TU Darmstadt / ULB / TUbiblio

Effect of boron incorporation on the phase composition and high-temperature behavior of polymer-derived silicon carbide

Kaur, Sarabjeet and Mera, Gabriela and Riedel, Ralf and Ionescu, Emanuel (2016):
Effect of boron incorporation on the phase composition and high-temperature behavior of polymer-derived silicon carbide.
In: Journal of the European Ceramic Society, Elsevier Science Publishing, pp. 967-977, 36, (4), ISSN 09552219,
[Online-Edition: http://dx.doi.org/10.1016/j.jeurceramsoc.2015.11.037],
[Article]

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.

Item Type: Article
Erschienen: 2016
Creators: Kaur, Sarabjeet and Mera, Gabriela and Riedel, Ralf and Ionescu, Emanuel
Title: Effect of boron incorporation on the phase composition and high-temperature behavior of polymer-derived silicon carbide
Language: English
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.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 36
Number: 4
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Polyborocarbosilane, Single-source precursor, Polymer-derived ceramics (PDCs), Silicon carbide, Pressureless preparation
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 2016 09:13
Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2015.11.037
Identification Number: doi:10.1016/j.jeurceramsoc.2015.11.037
Funders: Financial support from the Deutsche Forschungsgemeinschaft (DFG, Bonn, Germany) and the ERC (FP7 ITN FUNEA) is gratefully acknowledged., Financial support from the R&D Convergence Program of MSIP (Ministry of Science, ICT and Future Planning) and NST (National Research Council of Science & Technology) of Republic of Korea (Grant: CMIP-13-4-KIMS) is gratefully acknowledged.
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item