TY - JOUR
T1 - Interfacial diffusion behaviour and mechanical properties of SiC/Ta hybrid accident tolerance fuel cladding structure
AU - Qin, Hailong
AU - Li, Xiaoqiang
AU - Zheng, Ce
AU - Xu, Shanshan
AU - Cheng, Laifei
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/2
Y1 - 2023/2
N2 - Innovatively designed CMCs/Ta/CMCs hybrid cladding tubes are promising accident-resistant fuel cladding materials, which are suitable for sodium-cooled fast reactors. In this work, such hybrid materials are designed and fabricated, the interfacial reaction mechanism between silicon carbide (SiC) and tantalum (Ta) are investigated after pressureless thermal treatment, and the mechanical properties of SiC/Ta joints are characterized at ambient temperature. A reaction zone with five distinct sublayers is formed in various annealing conditions. The reaction phases are identified using double CS-corrected STEM, and the diffusion path is experimentally validated as β-SiC | TaC | γ-Ta5Si3 | α-Ta2C | Ta2Si | Ta3Si | Ta. The mechanical properties of SiC/Ta samples are assessed by single-lap offset shear tests. In particular, the maximum shear strength of 13.86 ± 0.6 MPa is obtained after 5 h of annealing at 1500 °C. Four typical fracture models are established during the failure process.
AB - Innovatively designed CMCs/Ta/CMCs hybrid cladding tubes are promising accident-resistant fuel cladding materials, which are suitable for sodium-cooled fast reactors. In this work, such hybrid materials are designed and fabricated, the interfacial reaction mechanism between silicon carbide (SiC) and tantalum (Ta) are investigated after pressureless thermal treatment, and the mechanical properties of SiC/Ta joints are characterized at ambient temperature. A reaction zone with five distinct sublayers is formed in various annealing conditions. The reaction phases are identified using double CS-corrected STEM, and the diffusion path is experimentally validated as β-SiC | TaC | γ-Ta5Si3 | α-Ta2C | Ta2Si | Ta3Si | Ta. The mechanical properties of SiC/Ta samples are assessed by single-lap offset shear tests. In particular, the maximum shear strength of 13.86 ± 0.6 MPa is obtained after 5 h of annealing at 1500 °C. Four typical fracture models are established during the failure process.
KW - Ceramic-matrix composites (CMCs)
KW - Microstructural analysis
KW - Sodium-cooled fast reactors (SFRs)
KW - Transport Phenomena analysis
UR - http://www.scopus.com/inward/record.url?scp=85145557907&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2022.107332
DO - 10.1016/j.compositesa.2022.107332
M3 - 文章
AN - SCOPUS:85145557907
SN - 1359-835X
VL - 165
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
M1 - 107332
ER -