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Phase Stability and Mechanical Properties of Zirconia and Zirconia Composites
Author(s) -
Dehestani Mahdi,
Adolfsson Erik
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02717.x
Subject(s) - materials science , flexural strength , cubic zirconia , composite material , scanning electron microscope , phase (matter) , bending , degradation (telecommunications) , ceramic , telecommunications , chemistry , organic chemistry , computer science
Monolithic zirconia materials (3Y‐ TZP , 10Ce‐ TZP , and 12Ce‐ TZP ) and their composites with 30 vol% alumina were produced. Low‐temperature aging degradation ( LTAD ) and mechanical properties of materials were investigated. For assessment of phase stability in the materials, aging experiments were performed in water at 90°C for 32, 64, and 128 days. The aging phenomenon was characterized and monitored using X‐Ray Diffraction ( XRD ) and Scanning Electron Microscopy ( SEM ). Four‐point bending was used to determine the flexural strength of materials before and after aging treatment in water at 90°C for 2, 4, and 6 months. The aging experiments resulted in different phase transformation rates for the materials studied. The 12Ce‐ TZP containing materials showed the highest resistance to low‐temperature aging and 3Y‐ TZP containing materials showed the highest bending strength. When compared, no change in flexural strength was observed between the materials not exposed to aging and the aged materials.