Petry, Nils‐Christian ; Ulrich, Anke Silvia ; Feng, Bo ; Ionescu, Emanuel ; Galetz, Mathias Christian ; Lepple, Maren (2022)
Oxidation resistance of ZrB 2 ‐based monoliths using polymer‐derived Si(Zr,B)CN as sintering aid.
In: Journal of the American Ceramic Societ, 105 (8)
doi: 10.1111/jace.18473
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The focus of the present work is the investigation of the influence of polymer-derived ceramics, used as sintering aids for preparing ZrB2-based monoliths, on their high-temperature oxidation behavior. For the preparation of the monoliths, ZrB2 powder was coated with polymer-derived SiCN, SiZrCN, or SiZrBCN and subsequently densified via hot-pressing at temperatures as low as 1800 degrees C. To investigate the oxidation kinetics, thermogravimetric analysis (TGA) was performed at 1300 degrees C in synthetic air with exposure times of 50 and 100 h. A detailed study of the materials oxide scale and subsurface microstructure was conducted using optical microscopy, electron probe microanalysis, scanning electron microscopy, and X-ray diffraction. The experimental findings were compared to thermodynamic equilibrium calculations using the CALPHAD method, which led to a better understanding of the oxidation mechanism. In comparison to the literature data of ZrB2-SiC, the results show improved oxidation resistance for all three investigated materials. The formation of gaseous species during oxidation, in particular CO, CO2, B2O3, and SiO, within the oxide scale of the monoliths was rationalized via CALPHAD calculations and used to explain the oxidation behavior and kinetics and also the formation of bubbles in the subsurface region of the oxidized specimens.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Petry, Nils‐Christian ; Ulrich, Anke Silvia ; Feng, Bo ; Ionescu, Emanuel ; Galetz, Mathias Christian ; Lepple, Maren |
| Art des Eintrags: | Bibliographie |
| Titel: | Oxidation resistance of ZrB 2 ‐based monoliths using polymer‐derived Si(Zr,B)CN as sintering aid |
| Sprache: | Englisch |
| Publikationsjahr: | August 2022 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Societ |
| Jahrgang/Volume einer Zeitschrift: | 105 |
| (Heft-)Nummer: | 8 |
| DOI: | 10.1111/jace.18473 |
| Kurzbeschreibung (Abstract): | The focus of the present work is the investigation of the influence of polymer-derived ceramics, used as sintering aids for preparing ZrB2-based monoliths, on their high-temperature oxidation behavior. For the preparation of the monoliths, ZrB2 powder was coated with polymer-derived SiCN, SiZrCN, or SiZrBCN and subsequently densified via hot-pressing at temperatures as low as 1800 degrees C. To investigate the oxidation kinetics, thermogravimetric analysis (TGA) was performed at 1300 degrees C in synthetic air with exposure times of 50 and 100 h. A detailed study of the materials oxide scale and subsurface microstructure was conducted using optical microscopy, electron probe microanalysis, scanning electron microscopy, and X-ray diffraction. The experimental findings were compared to thermodynamic equilibrium calculations using the CALPHAD method, which led to a better understanding of the oxidation mechanism. In comparison to the literature data of ZrB2-SiC, the results show improved oxidation resistance for all three investigated materials. The formation of gaseous species during oxidation, in particular CO, CO2, B2O3, and SiO, within the oxide scale of the monoliths was rationalized via CALPHAD calculations and used to explain the oxidation behavior and kinetics and also the formation of bubbles in the subsurface region of the oxidized specimens. |
| Freie Schlagworte: | oxidation resistance; polymer precursor; thermodynamics; thermogravimetry HIGH TEMPERATURE CERAMICS; ZIRCONIUM DIBORIDE; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; COMPOSITES; ZRB2; PRECURSOR; CARBIDE; CRYSTALLIZATION; STRENGTH |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 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 Jun 2022 08:12 |
| Letzte Änderung: | 10 Jun 2022 08:12 |
| PPN: | |
| Projekte: | China Scholarship Council, Grant Number 201806020006, German Research Foundation (DFG), Grant Number IO64/14-1, Research Training Group 2561 (RTG 2561), Grant Number 413956820 |
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