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Microstructural and Mechanical Properties of Hydroxyapatite–Zirconia Composites
Author(s) -
Erkmen Z. E.,
Genç Y.,
Oktar F. N.
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01849.x
Subject(s) - materials science , sintering , composite material , cubic zirconia , yttria stabilized zirconia , zirconate , indentation hardness , ceramic , fracture toughness , flexural strength , microstructure , titanate
This work focuses on the improvement of the mechanical properties of hydroxyapatite (HA) through the addition of 3 mol% yttria partially stabilized zirconia (PSZ). Enamel‐derived HA (EHA) from freshly extracted human teeth and commercial HA (CHA) were chosen as the matrix. The effects of addition up to 10 wt% of PSZ and of sintering temperature (1000°–1300°C) on the density, microhardness, and compression strength were evaluated. For EHA–PSZ composites, the density and mechanical properties were generally enhanced by adding 5 wt% PSZ, especially after sintering at 1200°C, whereas CHA–PSZ composites showed lower strength values at sintering temperatures of 1200° and 1300°C with respect to EHA–PSZ composites. This may be due to the lower stability of CHA–PSZ composites with higher amounts of calcium zirconate formed over 1100°C when compared with EHA–PSZ composites.