Mera, Gabriela ; Ishikawa, Ryo ; Ionescu, Emanuel ; Ikuhara, Yuichi ; Riedel, Ralf (2015)
Atomic-scale assessment of the crystallization onset in silicon carbonitride.
In: Journal of the European Ceramic Society, 35 (12)
doi: 10.1016/j.jeurceramsoc.2015.01.008
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Within the present study, atomic-scale electron microscopy investigation on the crystallization behavior of polysilylcarbodiimide-derived SiCN was performed. The as-prepared SiCN sample was found to be homogeneous and consisted of amorphous silicon nitride nano-domains dispersed within an amorphous, highly entangled graphene-like carbon matrix. Annealing of the sample at 1400 °C induced a slight increase of the ordering of the carbon phase. Additionally, the crystallization onset of the silicon nitride has been observed for the first time. In the sample annealed at 1400 °C small nano-clusters with average sizes of 0.8, 1.5 and 2.1 nm (consisting of 30, 180 and 570 atoms, respectively; corresponding to Si12N18, Si72N108 and Si228N342) were imaged and assigned to α-silicon nitride. The crystallization of the amorphous silicon nitride phase into α-Si3N4 is thought to occur via diffusion of Si and N, which rely on the presence of large number of dangling bonds in the amorphous SiCN sample.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Mera, Gabriela ; Ishikawa, Ryo ; Ionescu, Emanuel ; Ikuhara, Yuichi ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Atomic-scale assessment of the crystallization onset in silicon carbonitride |
| Sprache: | Englisch |
| Publikationsjahr: | Oktober 2015 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 35 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1016/j.jeurceramsoc.2015.01.008 |
| Kurzbeschreibung (Abstract): | Within the present study, atomic-scale electron microscopy investigation on the crystallization behavior of polysilylcarbodiimide-derived SiCN was performed. The as-prepared SiCN sample was found to be homogeneous and consisted of amorphous silicon nitride nano-domains dispersed within an amorphous, highly entangled graphene-like carbon matrix. Annealing of the sample at 1400 °C induced a slight increase of the ordering of the carbon phase. Additionally, the crystallization onset of the silicon nitride has been observed for the first time. In the sample annealed at 1400 °C small nano-clusters with average sizes of 0.8, 1.5 and 2.1 nm (consisting of 30, 180 and 570 atoms, respectively; corresponding to Si12N18, Si72N108 and Si228N342) were imaged and assigned to α-silicon nitride. The crystallization of the amorphous silicon nitride phase into α-Si3N4 is thought to occur via diffusion of Si and N, which rely on the presence of large number of dangling bonds in the amorphous SiCN sample. |
| Freie Schlagworte: | Silicon carbonitride, Polymer-derived ceramics, Phase separation, Atomic-resolution STEM, EELS |
| Zusätzliche Informationen: | 8th International Symposium on Nitrides in Conjunction with the 7th International Workshop on Spinel Nitrides and Related Materials and the Annual Meeting of the Marie Curie ITN 7th Framework Programme FUNEA |
| 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: | 22 Jun 2015 10:51 |
| Letzte Änderung: | 22 Jun 2015 10:51 |
| PPN: | |
| Sponsoren: | Financial support by the grants funded under the MWN (Materials World Network) of the DFG and the National Science Foundation as well as LOEWE-Zentrum AdRIA (Adaptronik – Research, Innovation, Application), funded by the state of Hesse,, Germany is gratefully acknowledged., A part of this study was supported by the Joint Research Project between Japan and Germany through JSPS (Japan Society for the Promotion of Science) Bilateral Program., R.I. also acknowledges support from JSPS Postdoctoral Fellowship for Research Abroad. |
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