Microwave sintered of 10Hydroxyapatite-Yttria stabilized Zirconia-Alumina Bioceramics Composites for biomedical applications
The minimal biocompatibility features and consequence implant loosening are the crucial issues in orthopedic implant complication. The prime requirements of medical implant are acceptable mechanical properties which impart excellent interaction with the surrounding tissue without elicit an advers...
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| Format: | Thesis |
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| Language: | English |
| Subjects: | |
| Online Access: | http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72312/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/72312/2/Full%20text.pdf |
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| Summary: | The minimal biocompatibility features and consequence implant loosening are the
crucial issues in orthopedic implant complication. The prime requirements of medical
implant are acceptable mechanical properties which impart excellent interaction with
the surrounding tissue without elicit an adverse response. The remarkable
biocompatibility properties of hydroxyapatite (HAP) acknowledged as the most
practical implant materials. The bioactive hydroxyapatite encountered with poor
mechanical properties.The presence of YSZ and Al2O3 areas an inert and physically
strong bioceramics with high level of biocompatibility. The research associated with
this bioceramics had been proven over the past years through the conventional sintering,
but processing this bioceramics composites using microwave hybrid heating is rather
scarce in literature. This research is specifically concerned with the effect of microwave
sintered 10HAP-YSZ-Al2O3 composites towardsdifferent sintering temperatures and
the various compositions of YSZ and Al2O3to 10 wt. % of HAP. Comparative sintering
was performed at temperatures of 900ºC, 1000 ºC and 1100 ºC. Composites containing
60 wt. % microwave sintered at temperature of 1000 ºC exhibited the greatest
properties, due to incorporation of YSZ and Al2O3which overcome the inherent
brittleness of HAP. The 10HAP-60YSZ-Al2O3 composites indicated an increase in
density to 2.88g/cm3, Vickers hardness and compressive strength results as 5.68GPa and
36.31MPa respectively. |
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