ZrO2-TiN Composites

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1.75 mol % Y2O3-stabilized ZrO2-based composites with 35-95 vol % TiN were fully densified by hot pressing for 1 hour at 1550°C under a load of 28 MPa. The TiN grain size was found to increase with increasing TiN content, resulting in a decreasing hardness and strength. The best mechanical properties, i.e., an indentation toughness of 5.9 MPa.m1/2 in combination with a Vickers hardness of 14.7 GPa and an excellent bending strength of 1674 MPa were obtained for the composites with 40 vol % TiN. The active toughening mechanisms were identified and their contribution to the overall composite toughness is discussed. Transformation toughening was found to be the primary toughening mechanism in all investigated composites.

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Periodical:

Edited by:

Hasan Mandal

Pages:

135-140

Citation:

S. Salehi et al., "ZrO2-TiN Composites", Materials Science Forum, Vol. 554, pp. 135-140, 2007

Online since:

August 2007

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$38.00

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DOI: https://doi.org/10.1520/c1259

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