The nature of adhesion at the fiber/matrix interface of modified Nicalon SiC fiber/M-D-F cement matrix composites was investigated. Using a nano-indentation method, in which load-displacement curves were generated from individual fibers, interfacial shear strengths were evaluated. AES and XPS studies were performed on the modified fibers to determine the chemical nature of the fiber surface. The fiber surface chemistry was then correlated to the interfacial shear strengths for each composite.
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