Paper Titles
The Intergranular Oxynitride Microstructure in Silicon Nitride Based Ceramics
p.113
Influence of Type of Cations on Intergranular Phase Crystallisation of SiAlON Ceramics
p.119
Silicon Nitride – Carbon Nanotube Composites
p.123
Particle -Reinforced SiAlONs for Cutting Tools
p.129
ZrO2-TiN Composites
p.135
Effect of Fibre Heat-Treatment on Nicalon SiC Fibre Reinforced β-SiAlON Matrix Composites
p.141
Corrosion Resistance of β-SiAlON-Based Ceramics Against Molten Steel
p.147
From Earth Minerals to Nitrides
p.151
The Growth and the Reaction Mechanism of Si3N4 Powder from Silica
p.157

ZrO2-TiN Composites

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Abstract:

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:

Materials Science Forum (Volume 554)

Pages:

135-140

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.554.135

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Online since:

August 2007

Authors:

Sedigheh Salehi, Omer Vander Biest, Jef Vleugels

Keywords:

Composite, Mechanical Property, Titanium Nitride TiN, Toughness, Zro2

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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