Properties of Pre-Sintered ZrO2(Y2O3) Blocks Consolidated by Cold Isostatic Pressing

Rafael Bernardino da Silva Jr.; Claudinei dos Santos; Leonardo Queiroz Bueno de Campos; Sabrina Vieira Campos; Yan Carlos Ambrosio de Souza

doi:10.4028/www.scientific.net/MSF.912.159

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HomeMaterials Science ForumMaterials Science Forum Vol. 912Properties of Pre-Sintered ZrO2(Y2O3) Blocks...

Properties of Pre-Sintered ZrO₂(Y₂O₃) Blocks Consolidated by Cold Isostatic Pressing

Abstract:

In this work, dental ceramics based on ZrO₂-Y₂O₃, made by cold isostatic pressing, were characterized and the properties were compared to conventional uniaxially pressed blocks. Pre-sintered ZrO₂-3%mol Y₂O₃ blocks were sintered at 1530oC-120min. The crystalline phases were identified by X-ray diffraction (XRD) and microstructural analysis was performed using Scanning Electron Microscopy (SEM). The materials were mechanically evaluated for their hardness, fracture toughness and its bending strength. The results of mechanical tests indicate that the ceramics studied showed hardness greater than 1220HV, fracture toughness of about 8.2 MPam^1/2 and bending strength higher than 1000 MPa. The results indicate excellent mechanical behaviour and negligible differences between uniaxial and isostatic products, but it is possible to see an increase of homogeneity in the final shrinkage after sintering.

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Periodical:

Materials Science Forum (Volume 912)

Pages:

159-164

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.912.159

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Online since:

January 2018

Authors:

Rafael Bernardino da Silva Jr., Claudinei dos Santos, Leonardo Queiroz Bueno de Campos, Sabrina Vieira Campos, Yan Carlos Ambrosio de Souza

Keywords:

Cold Isostatic Pressing, Properties, Sintering, Zirconia Ceramic

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