Development and Characterization of Al2O3-ZrO2 Composites Using ZrO2(Y2O3)-Recycled as Raw Material

Caio Marcelo Felbinger Azevedo Cossu; Manuel Fellipe Rodrigues Pais Alves; Luiz Cláudio Lemos de Assis; Roberto de Oliveira Magnago; José Vitor Candido de Souza; Claudinei dos Santos

doi:10.4028/www.scientific.net/MSF.912.124

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HomeMaterials Science ForumMaterials Science Forum Vol. 912Development and Characterization of Al2O3-ZrO2...

Development and Characterization of Al₂O₃-ZrO₂ Composites Using ZrO₂(Y₂O₃)-Recycled as Raw Material

Abstract:

The objective of this work was the development of Al₂O₃-ZrO₂ceramic composites using recycled-source of ZrO₂(Y₂O₃). Al₂O₃ powder was mixed with different proportions of ZrO₂(Y₂O₃) arising from pre-sintered blocks used in dental prostheses manufacturing. The mixtures containing 3wt% to 15wt% ZrO₂(Y₂O₃) were uniaxially pressed at 80MPa and sintered at 1600°C-2h. Raw materials and sintered samples were characterized by X-ray diffraction, scanning electron microscopy (SEM), relative density, hardness and fracture toughness. The results of X-ray diffraction showed α-Al₂O₃ and tetragonal-ZrO₂ as crystalline phases after sintering. Furthermore, the relative density in all compositions was higher than 95%. The samples presented Vickers hardness and fracture toughness higher than 1300HV and 3.5MPa. m^1/2, respectively.

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Periodical:

Materials Science Forum (Volume 912)

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124-129

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.912.124

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Online since:

January 2018

Authors:

Caio Marcelo Felbinger Azevedo Cossu*, Manuel Fellipe Rodrigues Pais Alves, Luiz Cláudio Lemos de Assis, Roberto de Oliveira Magnago, José Vitor Candido de Souza, Claudinei dos Santos

Keywords:

Al₂O₃-ZrO₂ Composite, Mechanical Properties, Sintering, Source of ZrO₂(Y₂O₃) Recycled

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