| چکیده انگلیسی مقاله |
Ceramic dental materials have been considered as alternatives to metals for dental implants application. In this respect, zirconia tetragonal stabilized with %3 yttrium, is of great importance among the ceramic materials for endosseous dental implant application. Because of its good mechanical properties and color similar to tooth. The aim and novelty of this study was to design and prepare Y-TZP nano-composite to reduce the degradation process at low temperature by alumina addition and maintaining submicron grain sized. Also, flexural strength of nano-composite samples was evaluated. Toward this purpose, alumina-Y-TZP nano-composites containing 0–30 vol% alumina (denoted as A-Y-TZP 0-30) were fabricated using α-alumina and Y-TZP nano-sized by sintering pressure less method. The synthesized samples were characterized using x-ray diffraction, field emission scanning electron microscopy equipped with energy dispersive x-ray spectroscopy techniques. Nano-composite samples with high density (≥96%) and grain sized of ≤ 400 nm was obtained by sintering at 1270 °C for 170 min. After low temperature degradation test (LTD), A-Y-TZP20 and A-Y-TZP30 not showed monoclinic phase and the flexural strength in all of samples were higher than A-Y-TZP0. It was concluded that the grains were remained in submicron sized and A-Y-TZP20 and A-Y-TZP30 did not present biaxial strength reduction after LTD test. |
| نویسندگان مقاله |
ملوک عیوضی |
biomaterials reserach group, department of materials engineering, isfahan university of technology, isfahan, 84156-83111, iran.
سازمان اصلی تایید شده: دانشگاه صنعتی اصفهان (Isfahan university of technology)
محمدحسین فتحی |
biomaterials reserach group, department of materials engineering, isfahan university of technology, isfahan, 84156-83111, iran.
سازمان اصلی تایید شده: دانشگاه صنعتی اصفهان (Isfahan university of technology)
فرحناز نجاتی دانش |
dental materials research center, school of dentistry, isfahan university of medical sciences, isfahan,iran.
سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)
وجیهه السادات مرتضوی |
torabinejad dental research center, department of operative dentistry, school of dentistry, isfahan university of medical sciences, isfahan 81746-73461, iran.
سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)
بتول هاشمی بنی |
department of anatomical sciences and molecular biology, school of medicine, isfahan university of medical sciences, isfahan 81746-73461, iran.
سازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (Isfahan university of medical sciences)
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