Luan, Xingang ; Zhang, Jiahao ; Wang, Lei ; Wen, Qingbo ; Yu, Zhaoju ; Cheng, Laifei ; Riedel, Ralf (2020)
Wet oxidation behavior of C/SiC–SiHf(B)CN composites at high temperature.
In: Advanced Composites and Hybrid Materials, 3 (3)
doi: 10.1007/s42114-020-00172-2
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
To further improve the oxidation resistance of C/SiC-SiBCN at temperatures over 1200 degrees C, C/SiC-SiHfCN and C/SiC-SiHfBCN composites were prepared by a new method called chemical vapor infiltration (CVI) combined with polymer infiltration and on-line pyrolysis (PIOP) process. The weight change behavior, mechanical properties, and microstructure of C/SiC-SiHf(B)CN before and after oxidation in wet oxygen were studied in detail. Through the replacement of B by Hf, the weight loss of the composite in high-temperature wet oxygen environment has been significantly reduced. The strength retention of C/SiC-SiHfBCN is up to 75% after oxidation in wet oxygen at 1400 degrees C and the strength retention of C/SiC-SiHfBCN can reach 85% after oxidation in an atmosphere with high oxygen and water vapor content at 1300 degrees C. In addition, microscopic analysis showed that after oxidation at 1400 degrees C, only the fibers in the near-surface matrix were oxidized to some extent and hafnium has been enriched at the composite surface. Our work provides a reference for the study of the oxidation resistance of C/SiC composites in harsh environments.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Luan, Xingang ; Zhang, Jiahao ; Wang, Lei ; Wen, Qingbo ; Yu, Zhaoju ; Cheng, Laifei ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Wet oxidation behavior of C/SiC–SiHf(B)CN composites at high temperature |
| Sprache: | Englisch |
| Publikationsjahr: | September 2020 |
| Verlag: | Springer Nature |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Advanced Composites and Hybrid Materials |
| Jahrgang/Volume einer Zeitschrift: | 3 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.1007/s42114-020-00172-2 |
| URL / URN: | https://link.springer.com/article/10.1007/s42114-020-00172-2 |
| Kurzbeschreibung (Abstract): | To further improve the oxidation resistance of C/SiC-SiBCN at temperatures over 1200 degrees C, C/SiC-SiHfCN and C/SiC-SiHfBCN composites were prepared by a new method called chemical vapor infiltration (CVI) combined with polymer infiltration and on-line pyrolysis (PIOP) process. The weight change behavior, mechanical properties, and microstructure of C/SiC-SiHf(B)CN before and after oxidation in wet oxygen were studied in detail. Through the replacement of B by Hf, the weight loss of the composite in high-temperature wet oxygen environment has been significantly reduced. The strength retention of C/SiC-SiHfBCN is up to 75% after oxidation in wet oxygen at 1400 degrees C and the strength retention of C/SiC-SiHfBCN can reach 85% after oxidation in an atmosphere with high oxygen and water vapor content at 1300 degrees C. In addition, microscopic analysis showed that after oxidation at 1400 degrees C, only the fibers in the near-surface matrix were oxidized to some extent and hafnium has been enriched at the composite surface. Our work provides a reference for the study of the oxidation resistance of C/SiC composites in harsh environments. |
| Freie Schlagworte: | National Key R&D Programof China, Grant Number 2017YFB1103500, National Natural Science Foundation of China (NSFC), Grant Numbers 91960105 91860140 51672218 51632007 51821091, C/SiC; PDC; SiHf(B)CN; Matrix modification; Oxidation CERAMIC COMPOSITES; WATER-VAPOR; COATINGS; KINETICS |
| 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: | 20 Okt 2020 05:32 |
| Letzte Änderung: | 20 Okt 2020 05:32 |
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