SiC, SiC fibers and SiCf/SiCm composites

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Table of contents

1 Introduction 
2 SiC, SiC fibers and SiCf/SiCm composites 
2.1 SiC
2.2 SiC based composites
2.3 SiC fibers
2.3.1 First generation SiC based fibers
2.3.2 Second generation SiC fibers
2.3.3 Third generation SiC fibers
3 Ion and neutron irradiation effects in SiC and SiC fibers 
3.1 Irradiation damage creation
3.1.1 Monte Carlo simulations for irradiation damage estimation
3.2 Irradiation effects in SiC single crystals and CVD-SiC
3.2.1 Irradiation induced amorphization
3.2.2 Irradiation induced swelling
3.2.3 Degradation of physical properties
3.2.4 Thermal annealing of irradiation effects
3.3 Irradiation effects in SiC fibers
3.3.1 Irradiation induced surface degradation
3.3.2 Irradiation induced amorphization, densification and swelling
3.3.3 Irradiation induced degradation of physical properties
3.3.4 Influence of the fiber in SiCf/SiCm irradiation stability
4 Materials & Methods 
4.1 Materials
4.2 Ion-irradiation facilities
4.2.1 JANNUS
4.2.2 GANIL
4.3 In situ tensile test device: MiniMecaSiC
4.4 Characterization techniques
4.4.1 Micro-Raman spectroscopy
4.4.2 Transmission electron microscopy
4.4.2.1 TEM thin foils preparation
4.4.3 Environmental scanning electron microscopy
5 Characterization of the ion-amorphization threshold conditions of third generation SiC fibers 
5.1 Introduction
5.2 Ion-irradiation conditions
5.3 Results
5.3.1 Microstructural characterization of as-received materials
5.3.2 Ion-amorphization kinetics at RT
5.3.3 Ion-amorphization as a function of the irradiation temperature
5.4 Discussion
5.5 Conclusions
6 Characterization of the effects of thermal annealing on ion-amorphized 6H-SiC and third generation SiC fibers
6.1 Introduction
6.2 Experimental conditions
6.2.1 Materials
6.2.2 In situ E-SEM
6.2.3 In situ TEM
6.3 Results
6.3.1 Thermal annealing induced cracking
6.3.2 Thermal annealing induced recrystallization
6.3.2.1 Ion-amorphized 6H-SiC single crystal
6.3.2.2 Ion-amorphized HNS fiber
6.3.2.3 Ion-amorphized TSA3 fiber
6.4 Discussion
6.5 Conclusions
7 In situ characterization of ion-irradiation creep of third generation Tyranno SA3 SiC fibers
7.1 Introduction
7.2 Experimental conditions
7.2.1 Fiber selection and preparation
7.2.2 Ion-irradiation conditions
7.2.3 Ion-flux-induced temperature rise estimation
7.3 Results
7.3.1 Thermal creep
7.3.2 Influence of the irradiation temperature on in situ tensile tests
7.3.3 Characterization of irradiation creep at high irradiation temperatures
7.4 Post-mortem characterization
7.5 Discussion
7.6 Conclusions
8 Summary Conclusions & Future Work