Table of Contents
Journal of Ceramics
Volume 2013, Article ID 430408, 6 pages
http://dx.doi.org/10.1155/2013/430408
Research Article

Influence of the Dopants on the Mechanical Properties of Alumina-Based Ceramics

Institute of Electrophysics UD RAS, Amundsen Street, 106, Yekaterinburg 620016, Russia

Received 29 September 2013; Revised 30 October 2013; Accepted 11 November 2013

Academic Editor: Young-Wook Kim

Copyright © 2013 Anton Sergeevich Kaygorodov et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In the present study the mechanical properties of dense alumina-based ceramics obtained by two processing routes are investigated. The application of magnetic-pulsed compaction or hot pressing of the powder leads to a comparable combination of microhardness, elastic modulus, and fracture toughness. The insertion of Al into Al2O3 powder increases the microdistortions of the crystalline lattice, resulting in the sufficient decrease of indentation wear-resistance. The usage of ZrO2 or TiCN as dopants to alumina matrix improves slightly the mechanics of the composites with a noticeable decrease of the material lost by 30% compared to pure alumina at closely spaced arrays of indents. Regardless of the synthesis method, the ceramic grains were formed completely with the fracture travelling along the grain boundaries.