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Effect of TiN Addition on Microstructure and Mechanical Properties of Zirconia Matrix Ceramic Tool Material

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Abstract:

In this paper, 3mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) and TiN/3Y-TZP(adding TiN particles to 3Y-TZP) composites were fabricated by hot-pressing technique. Phase composition, microstructure and mechanical properties of the composites were investigated. It is shown that the flexural strength, fracture toughness and Vickers hardness of TiN/3Y-TZP was significantly improved by the addition of TiN particles compared with 3Y-TZP. The flexural strength of ZYT2 (20wt% TiN addition) is 1318 MPa. The fracture toughness of ZYT4 (40wt% TiN addition) is 16.8MPa·m1/2. The toughening and strengthening mechanisms were analyzed. The XRD results show that the additing of TiN can hinder the transformation from tetragonal phase to monoclinic phase of 3Y-TZP during fabrication process.

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Periodical:

Materials Science Forum (Volumes 471-472)

Pages:

321-325

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.471-472.321

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Online since:

December 2004

Authors:

Jing Sun, Chuan Zhen Huang, Han Lian Liu, Sui Lian Wang

Keywords:

3Y-TZP, Mechanical Property, Microstructure, Titanium Nitride TiN

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© 2004 Trans Tech Publications Ltd. All Rights Reserved

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