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Advisor(s)
Abstract(s)
The aim of this work is to determine the values of the hardness and elastic modulus
of the phases present in CaZrO3-MgO-ZrO2 composites and to analyse their contribution
to the composite properties. Two materials previously developed with the same major
phases (CaZrO3, MgO and c-ZrO2) present in different volume fractions and grain size
have been analysed. The hardness and Young´s modulus of each phase determined by
nanoindentation are independent from the specific composite and coincident with
nanoindentation values for single phase bulk materials. The contribution of the
individual phases to Young´s modulus of the multiphase materials is in agreement with
calculations using the nanoindentation values and the Voight upper limit of the “rule of
mixtures”. Scale dependence due to microcracking has been observed for microhardness
values of the composites and differences between calculations and
experimental values are related to this effect.
Description
Keywords
Young’s modulus CaZrO3 Hardness Ca-ZrO2 Nanoindentation
Citation
Publisher
Elsevier