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- W2316477454 abstract "The dependence of porosity on the fracture toughness of polycrystalline graphite materials was investigated. Two isotropic graphites with different microstructures were pitch-impregnated, carbonized, and then graphitized to change the porosity. The fracture stress σf and the fracture toughness KIC of the graphites were measured by three point bending test and compact tension test, respectively. Both values σf and KIC linearly increased with decreasing porosity P (ranging from 21% to 13%) for each graphite material, and expressed by;σf=σof (1-bsP)KIC=KoIC (1-btP)The linear regression analysis suggested that the parameter bt was nearly equal to the parameter bs for each graphite, and that the values of KoIC were estimated to be about 1.3MPa√m for both graphites. It was elucidated that the dependence of porosity on the fracutre toughness was similar to that on the fracture stress of the polycrystalline graphite materials." @default.
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- W2316477454 date "1991-01-01" @default.
- W2316477454 modified "2023-10-02" @default.
- W2316477454 title "The Dependence of Porosity on The Fracture Toughness of Polycrystalline Graphites" @default.
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- W2316477454 doi "https://doi.org/10.7209/tanso.1991.134" @default.
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