Li, Wei ; Widenmeyer, Marc ; Ding, Jinxue ; Jiang, Tianshu ; Feldmann, Laura ; Liu, Jiongjie ; Molina-Luna, Leopoldo ; Weidenkaff, Anke ; Riedel, Ralf ; Yu, Zhaoju (2023)
Phase evolution and oxidation resistance of Si₃N₄/HfB₂/HfBxCyN₁₋x₋y ceramic nanocomposites prepared from tailored preceramic polymers.
In: Ceramics International, 49 (21)
doi: 10.1016/j.ceramint.2023.08.123
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Single-source-precursor derived ceramics exhibit advantages for the preparation of Si-based ceramics with controllable phase composition and adjustable functional/mechanical properties, which has significant potential for (ultra)high temperature ceramic materials. Within the present work, a series of hafnium/boron-containing Si3N4-based ceramics (SiHfBCN) are prepared upon pyrolysis/annealing of the corresponding single-source-precursors in N2 atmosphere at different temperatures ranging from 1000 °C to 1700 °C. The high-temperature (micro)structural evolution with respect to the annealing temperatures and boron concentration was studied using X-ray powder diffraction, Raman spectroscopy, and transmission electron microscopy. The results show that the amorphous SiHfBCN ceramics convert upon crystallization into ceramic nanocomposites consisting of a α-Si3N4 matrix with embedded Si, HfB2, and HfBxCyN1–x–y. The formation and stability of HfBxCyN1–x–y solid solution were discussed in detail. Finally, the oxidation resistance of the obtained α-Si3N4/HfB2/HfBxCyN1–x–y ceramic nanocomposites was investigated by thermal gravimetric analysis in air.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Li, Wei ; Widenmeyer, Marc ; Ding, Jinxue ; Jiang, Tianshu ; Feldmann, Laura ; Liu, Jiongjie ; Molina-Luna, Leopoldo ; Weidenkaff, Anke ; Riedel, Ralf ; Yu, Zhaoju |
| Art des Eintrags: | Bibliographie |
| Titel: | Phase evolution and oxidation resistance of Si₃N₄/HfB₂/HfBxCyN₁₋x₋y ceramic nanocomposites prepared from tailored preceramic polymers |
| Sprache: | Englisch |
| Publikationsjahr: | 1 November 2023 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Ceramics International |
| Jahrgang/Volume einer Zeitschrift: | 49 |
| (Heft-)Nummer: | 21 |
| DOI: | 10.1016/j.ceramint.2023.08.123 |
| Kurzbeschreibung (Abstract): | Single-source-precursor derived ceramics exhibit advantages for the preparation of Si-based ceramics with controllable phase composition and adjustable functional/mechanical properties, which has significant potential for (ultra)high temperature ceramic materials. Within the present work, a series of hafnium/boron-containing Si3N4-based ceramics (SiHfBCN) are prepared upon pyrolysis/annealing of the corresponding single-source-precursors in N2 atmosphere at different temperatures ranging from 1000 °C to 1700 °C. The high-temperature (micro)structural evolution with respect to the annealing temperatures and boron concentration was studied using X-ray powder diffraction, Raman spectroscopy, and transmission electron microscopy. The results show that the amorphous SiHfBCN ceramics convert upon crystallization into ceramic nanocomposites consisting of a α-Si3N4 matrix with embedded Si, HfB2, and HfBxCyN1–x–y. The formation and stability of HfBxCyN1–x–y solid solution were discussed in detail. Finally, the oxidation resistance of the obtained α-Si3N4/HfB2/HfBxCyN1–x–y ceramic nanocomposites was investigated by thermal gravimetric analysis in air. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Elektronenmikroskopie 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Werkstofftechnik und Ressourcenmanagement |
| Hinterlegungsdatum: | 02 Okt 2023 11:16 |
| Letzte Änderung: | 02 Okt 2023 11:16 |
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