Luan, Xingang ; Yuan, Jia ; Wang, Jianqiang ; Tian, Min ; Cheng, Laifei ; Ionescu, Emanuel ; Riedel, Ralf (2016)
Laser ablation behavior of Cf/SiHfBCN ceramic matrix composites.
In: Journal of the European Ceramic Society, 36 (15)
doi: 10.1016/j.jeurceramsoc.2016.04.010
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The behavior of Cf/SiHfBCN composites upon laser ablation was investigated. The evolution of microstructure and phase composition of the composite was studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It is found that the ablation mechanism and the microstructure evolution are mainly dependent on the local temperature which directly relies on the distance from the laser spot and the thermal conduction of the carbon fibers. Three regions with different ablation behavior are identified. In the center region, bubble-like structures consisting of HfO2, and SiHfxOy-based layers, cover the ends of the carbon fibers which retain their original shape despite their corrosion. Sheets consisting of HfCxOy and SiO2 as well as porous HfO2 and liquid SiO2 are generated in the transition region. The carbon fibers are well protected from oxidation in the two regions. SiO2 is produced and suppresses the further oxidation of the matrix in the fringe region.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Luan, Xingang ; Yuan, Jia ; Wang, Jianqiang ; Tian, Min ; Cheng, Laifei ; Ionescu, Emanuel ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Laser ablation behavior of Cf/SiHfBCN ceramic matrix composites |
| Sprache: | Englisch |
| Publikationsjahr: | November 2016 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 36 |
| (Heft-)Nummer: | 15 |
| DOI: | 10.1016/j.jeurceramsoc.2016.04.010 |
| Kurzbeschreibung (Abstract): | The behavior of Cf/SiHfBCN composites upon laser ablation was investigated. The evolution of microstructure and phase composition of the composite was studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). It is found that the ablation mechanism and the microstructure evolution are mainly dependent on the local temperature which directly relies on the distance from the laser spot and the thermal conduction of the carbon fibers. Three regions with different ablation behavior are identified. In the center region, bubble-like structures consisting of HfO2, and SiHfxOy-based layers, cover the ends of the carbon fibers which retain their original shape despite their corrosion. Sheets consisting of HfCxOy and SiO2 as well as porous HfO2 and liquid SiO2 are generated in the transition region. The carbon fibers are well protected from oxidation in the two regions. SiO2 is produced and suppresses the further oxidation of the matrix in the fringe region. |
| Freie Schlagworte: | Laser ablation, Ablation mechanism, Cf/SiHfBCN, UHT CMCs |
| Zusätzliche Informationen: | Preparation and Application of Ultra-high Temperature Ceramic Matrix Composites |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 17 Aug 2016 08:33 |
| Letzte Änderung: | 17 Aug 2016 08:33 |
| PPN: | |
| Sponsoren: | The work is supported by the fund of 111 Project (B08040), the State Key Laboratory of Solidification Processing in NWPU (No. 135-QP-2015)., The authors also acknowledge the financial supports from the project supported by State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China and the project sponsored by SRF for ROCS, SEM., JY acknowledges financial support from China Scholarship Council (CSC) during his stay at TU Darmstadt., Financial support from the German Research Foundation (DFG, Bonn, Germany) is gratefully acknowledged. |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum