Fabrication and sintering behavior of zinc-doped biphasic calcium phosphate bioceramics
Dense bioceramics with improved mechanical properties have been prepared using sol–gel derived zinc doped biphasic calcium phosphate (BCP) powders. Zinc concentration was varied in the range of 0,1, 2, 4, 5, 10, and 15mol%. The compaction of the powders followed by sintering provided the dense cer...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Taylor & Francis
2016
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/46963/ http://irep.iium.edu.my/46963/ http://irep.iium.edu.my/46963/7/46963_Fabrication%20and%20sintering%20behavior.pdf http://irep.iium.edu.my/46963/8/46963_Fabrication%20and%20sintering%20behavior_WOS%20SCOPUS.pdf |
| Summary: | Dense bioceramics with improved mechanical properties have been prepared using sol–gel derived zinc doped biphasic calcium phosphate
(BCP) powders. Zinc concentration was varied in the range of 0,1, 2, 4, 5, 10, and 15mol%. The compaction of the powders followed by sintering
provided the dense ceramics. The effects of zinc concentration doped and sintering temperature on phase stability and mechanical characteristics
were examined. The presence of Zn changed the phase of dense BCP, leading to improved mechanical properties. Zn free BCP attained the
highest density of only 92.6% after 1400�C sintering, equally achieved by 4mol% Zn-doped BCP at a lower temperature of 1200�C. It is presumed
that the steady increase in the compact density up to 4mol%zinc incorporation was contributed by progressive consolidation in the BCP
structure, but the density dropped again from 5mol% until 15mol% due to low density b-tricalcium phosphate phase formation. This study
showed that Zn doping was effective in producing high strength dense BCP with 3.40GPa hardness and 1.43MPa �m1=2 fracture toughness. |
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