Feng, Bo ; Fetzer, Ann‐Katrin ; Ulrich, Anke Silvia ; Galetz, Mathias Christian ; Kleebe, Hans-Joachim ; Ionescu, Emanuel (2022)
Monolithic ZrB2‐based UHTCs using polymer‐derived Si(Zr,B)CN as sintering aid.
In: Journal of the American Ceramic Society, 105 (1)
doi: 10.1111/jace.18038
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In the present work, dense ZrB2-based monoliths were produced via hot-pressing of ZrB2 powders coated with amorphous polymer-derived SiCN, SiZrCN, or SiZrBCN at relatively moderate temperatures (i.e., 1800celcius). Thus, ZrB2 particles were embedded in polymer-derived ceramic shell were realized by coating their surface with the corresponding polymeric precursors (polysilazane, Zr-modified polysilazane, Zr- and B-modified polysilazane, as for SiCN, SiZrCN, and SiZrBCN; respectively), followed by cross-linking at 200celcius and pyrolysis at 1100celcius in Ar atmosphere. The obtained monolithic samples were carefully characterized concerning their phase composition and microstructure. Typically, the densified samples exhibit a homogeneous microstructure consisting of ZrB2 grains and a multi-phasic polymer-derived ceramic grain boundary phase (beta-SiC, t-BCN, ZrO2, and ZrC). The prepared monoliths exhibited fair hardness values, that is, 12.5, 14.2, and 13.3 GPa for ZrB2/SiCN, ZrB2/SiZrCN, and ZrB2/SiZrBCN.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Feng, Bo ; Fetzer, Ann‐Katrin ; Ulrich, Anke Silvia ; Galetz, Mathias Christian ; Kleebe, Hans-Joachim ; Ionescu, Emanuel |
| Art des Eintrags: | Bibliographie |
| Titel: | Monolithic ZrB2‐based UHTCs using polymer‐derived Si(Zr,B)CN as sintering aid |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2022 |
| Verlag: | The American Ceramic Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 105 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1111/jace.18038 |
| Kurzbeschreibung (Abstract): | In the present work, dense ZrB2-based monoliths were produced via hot-pressing of ZrB2 powders coated with amorphous polymer-derived SiCN, SiZrCN, or SiZrBCN at relatively moderate temperatures (i.e., 1800celcius). Thus, ZrB2 particles were embedded in polymer-derived ceramic shell were realized by coating their surface with the corresponding polymeric precursors (polysilazane, Zr-modified polysilazane, Zr- and B-modified polysilazane, as for SiCN, SiZrCN, and SiZrBCN; respectively), followed by cross-linking at 200celcius and pyrolysis at 1100celcius in Ar atmosphere. The obtained monolithic samples were carefully characterized concerning their phase composition and microstructure. Typically, the densified samples exhibit a homogeneous microstructure consisting of ZrB2 grains and a multi-phasic polymer-derived ceramic grain boundary phase (beta-SiC, t-BCN, ZrO2, and ZrC). The prepared monoliths exhibited fair hardness values, that is, 12.5, 14.2, and 13.3 GPa for ZrB2/SiCN, ZrB2/SiZrCN, and ZrB2/SiZrBCN. |
| Freie Schlagworte: | microstructure characterization; polymer-derived ceramic nanocomposites; transmission electron microscopy; ultrahigh-temperature ceramics; ZrB2; HIGH-TEMPERATURE CERAMICS; MECHANICAL-PROPERTIES; OXIDATION BEHAVIOR; TRIBOLOGICAL PROPERTIES; ZRB2-SIC CERAMICS; RESIDUAL-STRESSES; THERMAL-EXPANSION; PHASE EVOLUTION; SICN; NANOCOMPOSITES |
| Zusätzliche Informationen: | German Research Foundation (DFG) European Commission, Grant Number RTG 2561. German Research Foundation (DFG), Grant Number IO 64/14-1. China Scholarship Council, Grant Number 201806020006. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Geomaterialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| TU-Projekte: | DFG|IO64/14-1|Heisenberg-Förderung |
| Hinterlegungsdatum: | 10 Nov 2021 14:36 |
| Letzte Änderung: | 11 Nov 2021 13:20 |
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