Resistance To The Ballistic Impact Of
Doped Zirconia
Author(s)
L. Gómez & E. Ayllon
Abstract
In the 1950s, with the appearance of oxide ceramics (Al203, ZrO2, BeO, MgO),
ceramic materials started to arouse researchers’ interest. In 1975 Garvie and et al.
originated a new family of ceramics based on the addition of zirconium oxide.
In this work the mechanical properties and the penetration of a ballistic
impact zirconia and alumina were studied from the tiles obtained by the
sinterization of alumina and zirconia partially stabilized with Y2O3 (Y-PSZ).
Several compositions were processed, always predominating, in volume, a
matrix of alumina.
Beside impact experiences, mechanical properties were also evaluated.
The outcomes were analysed, comparing them against alumina formulae
without the addition of zirconia.
Keywords: zirconia, alumina, mechanical properties, dynamic charges.
1 Introduction
1.1 Introduction to ceramic materials
Ceramic materials have two important characteristics: they are generally harder,
more resistant and lighter than metals and are capable of keeping a high
resistance to deformation at high temperatures. However, the potential
applications of ceramic materials such as alumina are conditioned by their
fragility, which brings about sudden catastrophic fractures and a low resistance
to thermal shock; which is why some authors have suggested the use of ZrO2 as a
strengthening material [1]. For the ZrO2 to act as strengthening element it must
appear in its tetragonal crystallographic structure since it has been documented
Keywords
zirconia, alumina, mechanical properties, dynamic charges.
Related Book
Other papers in this volume
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