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

Author(s)

Ojaimi, Christiane Lago ^[1] ; Ferreira, Julieta Adriana ^[1] ; dos Santos, Fabio Andre ^[2] ; Chinelatto, Adilson Luiz ^[3] ; de Jesus Agnolon Pallone, Eliria Maria ^[1] ; Antonio Chinelatto, Adriana Scoton ^[3]

Affiliation

^[1] Univ Sao Paulo, Dept Biosyst Engn, Ave Duque Caxias Norte, 225, BR-13635900 Pirassununga, SP - Brazil

^[2] Univ Estadual Ponta Grossa, UEPG, Dept Dent, Ave Gen Carlos Cavalcanti, 4748, BR-84030900 Ponta Grossa, PR - Brazil

^[3] Univ Estadual Ponta Grossa, UEPG, Dept Mat Engn, Ave Gen Carlos Cavalcanti, 4748, BR-84030900 Ponta Grossa, PR - Brazil

• Document type: Review article
• Source: CERAMICS INTERNATIONAL; v. 44, n. 14, p. 16128-16136, OCT 1 2018.
• Web of Science Citations: 1

Abstract

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. (AU)

• FAPESP's process: 16/13256-1 - Study of the behavior of zirconia /alumina composites using flash sintering process and two-step sintering
• Grantee: Christiane Lago Ojaimi
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/07319-8 - Study ultra rapid sintering and low energy consumption: flash Sintering
• Grantee: Eliria Maria de Jesus Agnolon Pallone
• Support Opportunities: Regular Research Grants