To, Theany ; Stabler, Christina ; Ionescu, Emanuel ; Riedel, Ralf ; Célarié, Fabrice ; Rouxel, Tanguy (2020)
Elastic properties and fracture toughness of SiOC‐based glass‐ceramic nanocomposites.
In: Journal of the American Ceramic Society, 103 (1)
doi: 10.1111/jace.16686
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Four different SiOC glass ceramics were synthesized and their fracture toughness (KIc) and fracture surface energy (γ) were assessed by means of the single‐edge precracked beam (SEPB) method. In addition, the elastic moduli were measured and the Vickers indentation behavior (hardness and microcracking) was characterized. In particular, the dependence of KIc on the free carbon content and on the fraction of crystallized nanoparticles (SiC, ZrO2, HfO2) was investigated. An increase in KIc, from about 0.73 to 0.99 MPa √m is observed as the free carbon content is increased from less than 1 to 12 vol%. The addition of Hf and Zr (resulting in 4.5 to 7.8 vol% HfO2 and ZrO2 nanoparticles) was found to increase KIc to an extent similar to the free carbon content. Moreover, predicted KIc values, assuming that the crack travels through all phases accounting for their respective volume fractions, disrupting the weakest links within the structural units, are in agreement with the experimental values.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | To, Theany ; Stabler, Christina ; Ionescu, Emanuel ; Riedel, Ralf ; Célarié, Fabrice ; Rouxel, Tanguy |
| Art des Eintrags: | Bibliographie |
| Titel: | Elastic properties and fracture toughness of SiOC‐based glass‐ceramic nanocomposites |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2020 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 103 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1111/jace.16686 |
| URL / URN: | https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/ja... |
| Kurzbeschreibung (Abstract): | Four different SiOC glass ceramics were synthesized and their fracture toughness (KIc) and fracture surface energy (γ) were assessed by means of the single‐edge precracked beam (SEPB) method. In addition, the elastic moduli were measured and the Vickers indentation behavior (hardness and microcracking) was characterized. In particular, the dependence of KIc on the free carbon content and on the fraction of crystallized nanoparticles (SiC, ZrO2, HfO2) was investigated. An increase in KIc, from about 0.73 to 0.99 MPa √m is observed as the free carbon content is increased from less than 1 to 12 vol%. The addition of Hf and Zr (resulting in 4.5 to 7.8 vol% HfO2 and ZrO2 nanoparticles) was found to increase KIc to an extent similar to the free carbon content. Moreover, predicted KIc values, assuming that the crack travels through all phases accounting for their respective volume fractions, disrupting the weakest links within the structural units, are in agreement with the experimental values. |
| Freie Schlagworte: | Fracture toughness; glass ceramic; hafnium; SEPB; silicon oxycarbide; zirconium; temperature; creep-behavior; silicon oxycarbide glasses; structural-characterization; phase; stability; energy |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 30 Okt 2019 07:50 |
| Letzte Änderung: | 30 Okt 2019 07:50 |
| PPN: | |
| Projekte: | FP7 Ideas: European Research Council, Grant Number: 320506, German Science Foundation, Grant Number: IO 64/7-1 |
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