Influence of Al2O3 addition on microstructure and mechanical properties of 3YSZ-Al2O3 composites

Md Jaynul Abden; Jannatul Dil Afroze; Md Abdul Gafur; Faruque Uz Zaman Chowdhury

doi:10.3139/120.110743

Influence of Al₂O₃ addition on microstructure and mechanical properties of 3YSZ-Al₂O₃ composites

Md Jaynul Abden
, Jannatul Dil Afroze
, Md Abdul Gafur
, Faruque Uz Zaman Chowdhury

International Islamic University Chittagong
University Noakhali

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The effect of the amount of Al₂O₃ content on microstructure, tetragonal phase stability and mechanical properties of 3YSZ-Al₂O₃ composites are investigated in this study. The ceramic composites are obtained by means of uniaxial compacting at 210 MPa and green compacts are sintered at 1550 °C for 3 h in air. The monoclinic zirconia (m-ZrO₂) phase has completely been transformed into tetragonal zirconia (t-ZrO₂) phase with corresponding higher Al₂O₃ content. The t-ZrO₂ grains induce transgranular fracture mode that has contribution in improvement of fracture toughness. The maximum flexural strength of 340 MPa, Vickers hardness value of 14.31 GPa and fracture toughness of 5.1 MPa × m^1/2 in the composition containing 40 wt.-% Al₂O₃ is attributed to the microstructure with t-ZrO₂ grains as inter- and intragranular particles in the Al₂O₃ grains, which makes it suitable for dental applications.

Original language	English
Pages (from-to)	499-505
Number of pages	7
Journal	Materialpruefung/Materials Testing
Volume	57
Issue number	6
DOIs	https://doi.org/10.3139/120.110743
Publication status	Published - 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© Carl Hanser Verlag, München Materials Testing © Carl Hanser Verlag GmbH & Co. KG.

Keywords

Alumina
Flexural strength
Microstructure
Vickers hardness
Zirconia

Access to Document

10.3139/120.110743

Cite this

@article{282eb5c35f414678a77ddf3bb57fa442,

title = "Influence of Al2O3 addition on microstructure and mechanical properties of 3YSZ-Al2O3 composites",

abstract = "The effect of the amount of Al2O3 content on microstructure, tetragonal phase stability and mechanical properties of 3YSZ-Al2O3 composites are investigated in this study. The ceramic composites are obtained by means of uniaxial compacting at 210 MPa and green compacts are sintered at 1550 °C for 3 h in air. The monoclinic zirconia (m-ZrO2) phase has completely been transformed into tetragonal zirconia (t-ZrO2) phase with corresponding higher Al2O3 content. The t-ZrO2 grains induce transgranular fracture mode that has contribution in improvement of fracture toughness. The maximum flexural strength of 340 MPa, Vickers hardness value of 14.31 GPa and fracture toughness of 5.1 MPa × m1/2 in the composition containing 40 wt.-\% Al2O3 is attributed to the microstructure with t-ZrO2 grains as inter- and intragranular particles in the Al2O3 grains, which makes it suitable for dental applications.",

keywords = "Alumina, Flexural strength, Microstructure, Vickers hardness, Zirconia",

author = "Abden, \{Md Jaynul\} and Afroze, \{Jannatul Dil\} and Gafur, \{Md Abdul\} and Chowdhury, \{Faruque Uz Zaman\}",

note = "Publisher Copyright: {\textcopyright} Carl Hanser Verlag, M{\"u}nchen Materials Testing {\textcopyright} Carl Hanser Verlag GmbH \& Co. KG.",

year = "2015",

doi = "10.3139/120.110743",

language = "English",

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T1 - Influence of Al2O3 addition on microstructure and mechanical properties of 3YSZ-Al2O3 composites

AU - Abden, Md Jaynul

AU - Afroze, Jannatul Dil

AU - Gafur, Md Abdul

AU - Chowdhury, Faruque Uz Zaman

N1 - Publisher Copyright: © Carl Hanser Verlag, München Materials Testing © Carl Hanser Verlag GmbH & Co. KG.

PY - 2015

Y1 - 2015

N2 - The effect of the amount of Al2O3 content on microstructure, tetragonal phase stability and mechanical properties of 3YSZ-Al2O3 composites are investigated in this study. The ceramic composites are obtained by means of uniaxial compacting at 210 MPa and green compacts are sintered at 1550 °C for 3 h in air. The monoclinic zirconia (m-ZrO2) phase has completely been transformed into tetragonal zirconia (t-ZrO2) phase with corresponding higher Al2O3 content. The t-ZrO2 grains induce transgranular fracture mode that has contribution in improvement of fracture toughness. The maximum flexural strength of 340 MPa, Vickers hardness value of 14.31 GPa and fracture toughness of 5.1 MPa × m1/2 in the composition containing 40 wt.-% Al2O3 is attributed to the microstructure with t-ZrO2 grains as inter- and intragranular particles in the Al2O3 grains, which makes it suitable for dental applications.

AB - The effect of the amount of Al2O3 content on microstructure, tetragonal phase stability and mechanical properties of 3YSZ-Al2O3 composites are investigated in this study. The ceramic composites are obtained by means of uniaxial compacting at 210 MPa and green compacts are sintered at 1550 °C for 3 h in air. The monoclinic zirconia (m-ZrO2) phase has completely been transformed into tetragonal zirconia (t-ZrO2) phase with corresponding higher Al2O3 content. The t-ZrO2 grains induce transgranular fracture mode that has contribution in improvement of fracture toughness. The maximum flexural strength of 340 MPa, Vickers hardness value of 14.31 GPa and fracture toughness of 5.1 MPa × m1/2 in the composition containing 40 wt.-% Al2O3 is attributed to the microstructure with t-ZrO2 grains as inter- and intragranular particles in the Al2O3 grains, which makes it suitable for dental applications.

KW - Alumina

KW - Flexural strength

KW - Microstructure

KW - Vickers hardness

KW - Zirconia

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