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Tensile deformation behavior of plain-woven Tyranno-SA3 CVI-composites at elevated temperatures

平織構造を有するTyranno-SA3 CVI複合材料の高温引張変形挙動

小沢 和巳; 野澤 貴史; 豊島 和沖*; 谷川 博康; 檜木 達也*

Ozawa, Kazumi; Nozawa, Takashi; Toyoshima, Kazuoki*; Tanigawa, Hiroyasu; Hinoki, Tatsuya*

SiC/SiC複合材料は核融合炉用先進ブランケットにおいて有力な候補材料である。本研究では、炉材料設計データを蓄積するにあたり、必須にもかかわらず未だ知見の乏しい先進SiC/SiC複合材料の、非照射状態における高温引張変形挙動を評価した。平織構造のTyranno-SA3 SiC繊維で強化しSiCマトリックスを有する複合材料は、現在のところ特に顕著なノッチ効果も認められず、1000$$^{circ}$$C、真空雰囲気下では、比例限度応力(PLS)の130%の負荷で1986時間負荷し続けても破断しない優れた引張ラプチャー特性が示された。

An advanced SiC/SiC composite is a promising candidate material for fusion DEMO blanket. Current study preliminarily aims to examine tensile deformation behavior of unirradiated advanced SiC/SiC composites tested at high temperatures. In rupture tests being concurrently conducted at 1000$$^{circ}$$C in vaccum, it was revealed that the plain-woven CVI-SiC matrix composite reinforced with Tyranno-SA3 fibers did not fail at 174 MPa (equivalent to 130% of PLS at 1000$$^{circ}$$C) for 1986 hours. Presently there was no negative sign of the notch effects, implying their good rupture property at certain conditions of concern.

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