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Mode I fracture toughness of SiC particle-dispersed ZrB 2 matrix composite has been measured using DCDC specimen. Compression test results of the DCDC specimen show that the fracture toughness of the composite is independent of crack length with an average toughness ∼3.5 MPam. Optical microscope and SEM observations reveal a flat crack path and fracture surface with no significant toughening...
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