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SEM micrographs of the fracture surfaces of the whisker composite at different ratios of whiskers to silica. (A) The composites containing silica-fused whiskers showed rougher fracture surfaces, with large fracture steps (large arrows) and pulled-out whiskers (small arrows). (B) The whiskers appeared to be well bonded with the matrix resin at whisker-resin interfaces, as indicated by the arrows. (C) The silica particles on the surface of the whiskers. Images from [68].
