TY - JOUR
T1 - Helium implantation effects on mechanical properties of SiCf/SiC composites
AU - Hasegawa, A.
AU - Saito, M.
AU - Abe, K.
AU - Jones, R. H.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1998/3/1
Y1 - 1998/3/1
N2 - Helium effects on mechanical properties of SiC/SiC composites were studied to apply the composites on structural materials of a fusion reactor. Two types of 2D-SiC/SiC composites were examined in this work. Helium was implanted using 36 MeVα particles with an energy degrader system to obtain a uniform helium depth distribution in the specimen. The implantation temperature was 400-800°C and the helium concentration after implantation was about 150-170 appm. Three-point bending test was carried out at room temperature. Results of bending test showed that a small decrease of bend strength was observed in the composite which had the higher bend strength before implantation. Helium implantation effect was not clearly observed in the lower bend strength composite. SEM observation results on the fracture surface gave no evidence for fiber coating failure. The decrease of bend strength after helium implantation may be attributed to a degradation of mechanical properties of the fibers by implanted helium.
AB - Helium effects on mechanical properties of SiC/SiC composites were studied to apply the composites on structural materials of a fusion reactor. Two types of 2D-SiC/SiC composites were examined in this work. Helium was implanted using 36 MeVα particles with an energy degrader system to obtain a uniform helium depth distribution in the specimen. The implantation temperature was 400-800°C and the helium concentration after implantation was about 150-170 appm. Three-point bending test was carried out at room temperature. Results of bending test showed that a small decrease of bend strength was observed in the composite which had the higher bend strength before implantation. Helium implantation effect was not clearly observed in the lower bend strength composite. SEM observation results on the fracture surface gave no evidence for fiber coating failure. The decrease of bend strength after helium implantation may be attributed to a degradation of mechanical properties of the fibers by implanted helium.
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U2 - 10.1016/S0022-3115(97)00342-5
DO - 10.1016/S0022-3115(97)00342-5
M3 - Article
AN - SCOPUS:0032024801
VL - 253
SP - 31
EP - 35
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
IS - 1-3
ER -