Carbon / carbon Surface Sizing Agent composites were prepared with thermosetting resin-derived carbon matrix, and two groups of carbon fibers (ie, surface-treated and non-surface treated) with and without treatment dimensioning. These composites were treated with heat at 1000 ° C and 3000 ° C flexural strength and fracture behavior of the composites were investigated at room temperature. Surface treatment of carbon fibers played an important role in fracture behavior and strength of the composites. Composite with surface-treated carbon fibers heat treated at 1000 ° C, showed a low strength and a catastrophic fracture pattern, while the heat treated at 3000 ° C showed aSurface Sizing Agent pseudo-plastic fracture pattern. However, the exact opposite behavior in combination with non-surface-treated carbon fibers.
Graphitization of composites with two rows of carbon fibers exhibited a very different matrix microstructure. Composites with surfaceSurface Sizing Agent treated fibers showed a columnarlike carbon matrix while those with non-surface-treated fibers have a lamellar type carbon matrix well oriented on carbon fibers.
Graphitization of composites with two rows of carbon fibers exhibited a very different matrix microstructure. Composites with surfaceSurface Sizing Agent treated fibers showed a columnarlike carbon matrix while those with non-surface-treated fibers have a lamellar type carbon matrix well oriented on carbon fibers.
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