Plasma facing components fbr fUsion reactor devices are required to have high heat res正 stance, high thermal shock resistance , high joint strength, radiation damage resistance , etc . , since they are exposcd to very high heat load and plasma particle attacks . Joint materia 皿 s between tungsten and copper are expected to use as tbe plasma facing components with high perfermances f()r the next fUsion devices . They are feared that the mechanical properties and the microstructures change and degrade by neutron radiation darnage at the joint boundary area betWeen tungsten and copper . In this stUdy , it aims to clarify the effects ofneutron radiation on mechanica1 propcrties and microstructures at thejoint boundary area . Key Words3 襯 9 ∫燃 o 卿 er. ノ o ご 臆 砌 ' erial , bending strength , 厩 c 厂o ∫舩 伽 re , ηθ雄 o 加 尸尸adiation , piasmafacing component .
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