Ceramic Matrix Composites 2008
DOI: 10.1002/9783527622412.ch15
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CMC for Nuclear Applications

Akira Kohyama
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Cited by 11 publications
(16 citation statements)
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“…Monolithic SiC undergoes a moderate swelling when irradiated by neutrons, as the result of amorphization or point defect formation at low temperature and cavity and dislocation loops formation at high temperature. It first decreases as temperature is raised, passes through a minimum (0.2–0.4 vol% for a dose of 1–8 dpa) at 1100–1200°C, then increases to reach 1.5 vol% at 1600°C 17,73a,b . SiC matrix when deposited by CVI is pure, well crystallized and assumed to behave as monolithic SiC.…”
Section: Interphases In Sic/sic For Ht Nuclear Reactorsmentioning
confidence: 99%
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“…Monolithic SiC undergoes a moderate swelling when irradiated by neutrons, as the result of amorphization or point defect formation at low temperature and cavity and dislocation loops formation at high temperature. It first decreases as temperature is raised, passes through a minimum (0.2–0.4 vol% for a dose of 1–8 dpa) at 1100–1200°C, then increases to reach 1.5 vol% at 1600°C 17,73a,b . SiC matrix when deposited by CVI is pure, well crystallized and assumed to behave as monolithic SiC.…”
Section: Interphases In Sic/sic For Ht Nuclear Reactorsmentioning
confidence: 99%
“…As a result of this volume change mismatch upon neutron irradiation between SiC (CVI) matrix and 1st/2nd SiC fiber generations, debonding at FM interface usually occurs with mechanical properties degradation 73,75 . This key feature explains why stoichiometric SiC fibers are preferred for SiC/SiC to be used in nuclear reactors.…”
Section: Interphases In Sic/sic For Ht Nuclear Reactorsmentioning
confidence: 99%
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“…However, these fibers undergo shrinkage during irradiation by fast neutrons, which causes fiber/matrix debonding and degradation of mechanical properties. By contrast, the Hi‐NicalonS and SA3 fibers exhibit microstructural stability because of a well‐crystallized microstructure and a lower impurity content, like CVD/CVI SiC 1 . Thus, it is necessary to investigate the mechanical behavior of CVI SiC/SiC composites reinforced by Hi‐NicalonS and SA3 fibers to check whether they can meet stringent material requirements for fuel cladding: high mechanical properties and thermal conductivity under:…”
Section: Introductionmentioning
confidence: 99%