%0 Journal Article %T In situ TEM annealing of ion-amorphized Hi Nicalon S and Tyranno SA3 SiC fibers %+ CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)) %A Huguet Garcia, J. %A Jankowiak, A. %A Miro, S. %A Meslin, E. %A Serruys, Y. %A Costantini, Jm. %@ 0168-583X %J Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms %I Elsevier %V 374 %8 2016 %D 2016 %R 10.1016/j.nimb.2015.12.032 %K SiC fibers %K Ion-amorphization %K Recrystallization %K In situ TEM %K Thermal annealing %Z Physics [physics]/Nuclear Experiment [nucl-ex] %Z Physics [physics]/Nuclear Theory [nucl-th]Journal articles %X In this work, recrystallization of ion-amorphized Hi Nicalon Type S and Tyranno SA3 SiC fibers (4 MeV Au3+, 2 × 1015 cm−2) has been studied via in situ TEM annealing. Both fibers show a two-step recovery process of the radiation damage. First recovery stage starts at temperatures as low as 250 °C and implies recovery of the radiation swelling. Eventually the amorphous layer recrystallizes with no signs of polytype change (3C-SiC). Recrystallization temperatures yield 900–920 °C and 930 °C for the HNS and the TSA3 respectively. HNS fiber shows columnar recrystallization perpendicular to the amorphous–crystalline interphase with a grain growth rate of ∼20 nm min−1. On the other hand, recrystallization of TSA3 fiber is rather “spontaneous” with no preferential growth direction. The different recrystallization is attributed to the different microstructure of the fibers. %G English %L cea-02418713 %U https://cea.hal.science/cea-02418713 %~ CEA %~ DEN