Mechanical characterisation and hydrothermal degradation of Al2O3-15 vol% ZrO2 nanocomposites consolidated by two-step sintering

Mechanical characterisation and hydrothermal degradation of Al2O3-15 vol% ZrO2 nanocomposites consolidated by two-step sintering

The objective of this work was to study two-step sintering as a means of controlling the microstructure of Al2O3 matrix nanocomposites containing nanometric inclusions of ZrO2 15% by volume and evaluate its hydrothermal degradation as function of time and its mechanical properties. Powders of Al2O3...

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Bibliographic Details
Published in:Ceramics international Vol. 44; no. 14; pp. 16128 - 16136
Main Authors: Ojaimi, Christiane Lago, Ferreira, Julieta Adriana, dos Santos, Fábio André, Chinelatto, Adilson Luiz, Pallone, Eliria Maria de Jesus Agnolon, Chinelatto, Adriana Scoton Antonio
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-10-2018
Subjects:
A. Sintering
B. Alumina-zirconia nanocomposite
B. Microstructural control
C. Hydrothermal degradation
A. Sintering
C. Hydrothermal degradation
B. Alumina-zirconia nanocomposite
B. Microstructural control
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Summary:The objective of this work was to study two-step sintering as a means of controlling the microstructure of Al2O3 matrix nanocomposites containing nanometric inclusions of ZrO2 15% by volume and evaluate its hydrothermal degradation as function of time and its mechanical properties. Powders of Al2O3 and ZrO2 were prepared and compacted by means of isostatic pressing and sintering in different heating cycles. The results showed that two-step sintering allowed a more efficient microstructural control than single-step sintering, resulting in good mechanical properties. The studied nanocomposites showed excellent resistance to hydrothermal degradation compared to commercial ZrO2 and ZrO2 TZ-3Y-E.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2018.06.101