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Characterization of the ion-amorphization process and thermal annealing effects on third generation SiC fibers and 6H-SiC

The objective of the present work is to study the irradiation effects on third generation SiC fibers which fulfill the minimum requisites for nuclear applications, i.e. Hi-Nicalon type S, hereafter HNS, and Tyranno SA3, hereafter TSA3. With this purpose, these fibers have been ion-irradiated with 4 MeV Au ions at room temperature and increasing fluences. | Characterization of the ion-amorphization process and thermal annealing effects on third generation SiC fibers and 6H-SiC EPJ Nuclear Sci. Technol. 1 8 2015 Nuclear Sciences J. Huguet-Garcia et al. published by EDP Sciences 2015 amp Technologies DOI 10.1051 epjn e2015-50042-9 Available online at http www.epj-n.org REGULAR ARTICLE Characterization of the ion-amorphization process and thermal annealing effects on third generation SiC fibers and 6H-SiC Juan Huguet-Garcia1 Aurélien Jankowiak1 Sandrine Miro2 Renaud Podor3 Estelle Meslin4 Lionel Thomé5 Yves Serruys2 and Jean-Marc Costantini1 1 CEA DEN Service de Recherches Métallurgiques Appliquées 91191 Gif-sur-Yvette France 2 CEA DEN Service de Recherches en Métallurgie Physique Laboratoire JANNUS 91191 Gif-sur-Yvette France 3 ICSM-UMR5257 CEA CNRS UM2 ENSCM Site de Marcoule bâtiment 426 BP 17171 30207 Bagnols-sur-Cèze France 4 CEA DEN Service de Recherches en Métallurgie Physique 91191 Gif-sur-Yvette France 5 CSNSM CNRS-IN2P3 Université Paris-sud 91405 Orsay France Received 11 June 2015 Received in final form 14 September 2015 Accepted 24 September 2015 Published online 09 december 2015 Abstract. The objective of the present work is to study the irradiation effects on third generation SiC fibers which fulfill the minimum requisites for nuclear applications i.e. Hi-Nicalon type S hereafter HNS and Tyranno SA3 hereafter TSA3. With this purpose these fibers have been ion-irradiated with 4 MeV Au ions at room temperature and increasing fluences. Irradiation effects have been characterized in terms of micro-Raman Spectroscopy and Transmission Electron Microscopy and compared to the response of the as-irradiated model material i.e. 6H-SiC single crystals. It is reported that ion-irradiation induces amorphization in SiC fibers. Ion- amorphization kinetics between these fibers and 6H-SiC single crystals are similar despite their different microstructures and polytypes with a critical amorphization dose of 3 1014 cm 2 0.6 dpa at room