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Correlation between fracture toughness, work of fracture and fractal dimensions of Alumina-mullite-zirconia composites

DOI: 10.1590/S1516-14392003000200017

Keywords: work of fracture, fracture toughness, fractal dimension, roughness.

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the purpose of this work is to show the correlation between the fractal dimension, d, and mechanical properties such as work of fracture, gwof, and fracture toughness, kic. alumina-mullite-zirconia composites were characterized by the slit-island method, sim, to obtain values of d and its fractional part, d*. the fracture surface roughness was also evaluated using a cyclic voltametric method. it will be shown that there is a positive experimental dependency of gwof on d* and that there is not an evident correlation between kic and d*.


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