Abstract
AbstractIn this work, titania‐silicon oxycarbide nanocomposites synthesized via the polymer derived ceramics route have been sintered into crack‐free monoliths using spark plasma sintering and their mechanical properties as well as their apparent density have been characterized. The x‐ray diffractogram clearly showed the stabilization of anatase phase of size less than 10 nm size in an amorphous silicon oxycarbide matrix at 1200 °C. The hardness and elastic modulus determined using nanoindentation were found to be 9 GPa and 82 GPa, respectively, and the fracture toughness calculated using indentation crack length method was found to be 2.34 MPa m1/2. In addition to this, ball‐on‐three ball technique was used to evaluate the biaxial flexural strength and fractographic studies were carried out to understand the fracture mechanisms.
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