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Fabrication of TiN/Al2O3 Composites by a Novel Method

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Abstract:

A novel method of the combination of high energy milling and hot pressing was adapted to fabricate dense titanium nitride-alumina (TiN/Al2O3) in situ composites using Ti, Al and TiO2 as raw materials. Full dense and pure TiN/Al2O3 composites were fabricated at 1300 °C for 1 h under 10 MPa. The composition, microstructure and mechanical properties of the as-fabricated products were investigated. The results show that the synthesized TiN/Al2O3 composites possess high purity. The TiN/Al2O3 composites have a good combination of mechanical properties of hardness of 18.0 GPa, the flexural strength of 500 MPa, and the fracture toughness (KIC) of 5.2 MPa•m1/2. The strengthening and toughening mechanisms are also discussed.

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Periodical:

Applied Mechanics and Materials (Volumes 44-47)

Pages:

2504-2508

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.44-47.2504

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Online since:

December 2010

Authors:

Jian Feng Zhu, Lan Ye, Xi Hong Li, Fen Wang

Keywords:

Al2O3, Composite, Mechanical Property, TiN

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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