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Neutron Diffraction Studies of Functionally Graded Alumina/Zirconia Ceramics

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Abstract:

New functionally graded Al2O3/Y-ZrO2 ceramics are developed as a new material for production of hip prosthesis, especially all-ceramic hip bearings. The used concept of graded ceramics is expected to provide better long-term performance based on improved mechanical properties and lower clinical risks. Mechanical properties are strongly dependent on the distribution of residual stresses resulting mainly from phase specific stresses after cooling from the sintering temperature. However, these stresses could be optimized by an appropriate selection of a concentration profile of constituent phases. The non-destructive neutron diffraction mapping of residual stresses has been used to investigate this problem experimentally. In addition, the smallangle neutron scattering technique was applied to study the porosity in the ceramics as function of the production parameters.

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Periodical:

Materials Science Forum (Volumes 492-493)

Pages:

201-206

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.492-493.201

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Online since:

August 2005

Authors:

Petr Lukáš, Miroslav Vrána, Jan Šaroun, Vasyl Ryukhtin, Jef Vleugels, Guy Anné, Omer Van der Biest, Michael M. Gasik

Keywords:

Ceramic, Neutron Diffraction, Porosity, Residual Stress

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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