Kaur, Sarabjeet ; Mera, Gabriela ; Riedel, Ralf ; 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, 36 (4)
doi: 10.1016/j.jeurceramsoc.2015.11.037
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Kaur, Sarabjeet ; Mera, Gabriela ; Riedel, Ralf ; Ionescu, Emanuel |
| Art des Eintrags: | Bibliographie |
| Titel: | Effect of boron incorporation on the phase composition and high-temperature behavior of polymer-derived silicon carbide |
| Sprache: | Englisch |
| Publikationsjahr: | März 2016 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 36 |
| (Heft-)Nummer: | 4 |
| DOI: | 10.1016/j.jeurceramsoc.2015.11.037 |
| Kurzbeschreibung (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. |
| Freie Schlagworte: | Polyborocarbosilane, Single-source precursor, Polymer-derived ceramics (PDCs), Silicon carbide, Pressureless preparation |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 08 Jan 2016 09:13 |
| Letzte Änderung: | 08 Jan 2016 09:13 |
| PPN: | |
| Sponsoren: | 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. |
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