<abstract xmlns="http://www.w3.org/1999/xhtml">In this work, the effect of sintering parameters on electronic structure and physical properties of yttria-partially stabilized ZrO2 (YPSZ) commercial ceramics has been studied using the central composite design (CCD) method. The CCD method allows using empirical modelling with better fitting, by considering the interaction between both factors. Different temperature ranges and sintering times for processing of YPSZ ceramics have been used in order to evaluate the grain growth, hardness and volumetric shrinkage by the CCD method. X-ray diffraction patterns and Rietveld refinement data indicate that non-sintered YPSZ ceramics exhibits two phases related to tetragonal and monoclinic structures, while the sintered YPSZ ceramics exhibits a single phase related to a tetragonal structure. Moreover, the monoclinic structure presents zirconium (Zr) atoms coordinated to seven oxygen (O) atoms, while in the tetragonal structure Zr atoms are coordinated to eight O atoms. Field emission scanning electron microscopy images were employed to monitor the sintering and growth process. In addition, the response surfaces obtained from calculations presented the effect of thermal and kinetic variables on the physical properties such as average grain size, volumetric shrinkage and hardness of YPSZ ceramics.</abstract>

In this work, the effect of sintering parameters on electronic structure and physical properties of yttria-partially stabilized ZrO2 (YPSZ) commercial ceramics has been studied using the central composite design (CCD) method. The CCD method allows using empirical modelling with better fitting, by considering the interaction between both factors. Different temperature ranges and sintering times for processing of YPSZ ceramics have been used in order to evaluate the grain growth, hardness and volumetric shrinkage by the CCD method. X-ray diffraction patterns and Rietveld refinement data indicate that non-sintered YPSZ ceramics exhibits two phases related to tetragonal and monoclinic structures, while the sintered YPSZ ceramics exhibits a single phase related to a tetragonal structure. Moreover, the monoclinic structure presents zirconium (Zr) atoms coordinated to seven oxygen (O) atoms, while in the tetragonal structure Zr atoms are coordinated to eight O atoms. Field emission scanning electron microscopy images were employed to monitor the sintering and growth process. In addition, the response surfaces obtained from calculations presented the effect of thermal and kinetic variables on the physical properties such as average grain size, volumetric shrinkage and hardness of YPSZ ceramics.

Effect of sintering parameters using the central composite design method, electronic structure and physical properties of yttria-partially stabilized ZrO2 commercial ceramics

LSQM-Laboratório de Síntese Química de Materiais-DEMat

Departamento de Química-Universidade Federal de Săo Carlos-UFSCar

Materials Science-Poland

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Effect of sintering parameters using the central composite design method, electronic structure and physical properties of yttria-partially stabilized ZrO commercial ceramics

In this work, the effect of sintering parameters on electronic structure and physical properties of yttria-partially stabilized ZrO2 (YPSZ) commercial ceramics...

Effect of sintering parameters using the central composite design method, electronic structure and physical properties of yttria-partially stabilized ZrO₂ commercial ceramics

Pubblicato online: 24 feb 2017

Pagine: 225 - 238

Ricevuto: 15 set 2016

Accettato: 28 gen 2017

DOI: https://doi.org/10.1515/msp-2017-0035

Parole chiave
YPSZ ceramics, electronic structure, central composite design, hardness, shrinkage

© 2017 A.M. Mendes, M.C.B. Costa, V.D. Araújo, F.V. Motta, C.A. Paskocimas, W. Acchar, E. Longo, M.R.D. Bomio, L.S. Cavalcante

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Effect of sintering parameters using the central composite design method, electronic structure and physical properties of yttria-partially stabilized ZrO2 commercial ceramics

Pubblicato online: 24 feb 2017

Pagine: 225 - 238

Ricevuto: 15 set 2016

Accettato: 28 gen 2017

DOI: https://doi.org/10.1515/msp-2017-0035

Parole chiaveYPSZ ceramics, electronic structure, central composite design, hardness, shrinkage

© 2017 A.M. Mendes, M.C.B. Costa, V.D. Araújo, F.V. Motta, C.A. Paskocimas, W. Acchar, E. Longo, M.R.D. Bomio, L.S. Cavalcante

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Effect of sintering parameters using the central composite design method, electronic structure and physical properties of yttria-partially stabilized ZrO₂ commercial ceramics

Parole chiave
YPSZ ceramics, electronic structure, central composite design, hardness, shrinkage