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Mechanical and Biological Properties of Alumina and Titania Co-Doped Zirconia Ceramics

Oluşturulma Tarihi: 24-01-2017

Niteleme Bilgileri

Tür: Tez

Alt Tür: Yüksek Lisans Tezi

Yayınlanma Durumu: Yayınlanmamış

Dosya Biçimi: PDF

Dil: İngilizce

Konu(lar): TEKNOLOJİ, Metalürji,

Yazar(lar): Ağaç, Özlem (Yazar),

Emeği Geçen(ler): Park, Jongee (Danışman),

Anahtar Kelimeler

ZrO2, doping, mechanical properties, MTT assay, Fibroblast cell culture


Özet

Zirconia-based ceramics have generated considerable interests in the dental community as restorative dental materials due to their superb mechanical and chemical properties, biocompatibilty, and aesthetic characteristics.This study was to produce 3Y-TZP ceramics by adding titania and alumina as a dopant. Various amounts (ranging from 0 to 2 wt%) of TiO2 and Al2O3 were mono and co-doped to tetragonal zirconia ceramic containing 3 mol% yttria (3Y-TZP) by mechanical ball milling. The shaped samples were pressureless sintered at 1350, 1450 and 1550 °C for 2 hrs. Density, hardness, fracture toughness, and cell attachment of the co-doped 3Y-TZP ceramics were measured with respect to dopant addition. The mechanical property was determined using the method of Vickers indentation after sintering. XRD was operated to examine the crystalline phases in the titania and/or alumina-added zirconia ceramics. SEM was used for analysis of grain size and surface morphology. The results show that density decreased gradually as the amount of dopant was increased. The mechanical properties showed the maximum value when 0.5 wt% TiO2 and 1.0 wt% Al2O3 were co-doped to 3Y-TZP. Crystalline phase formation and microstructural morphology were investigated by XRD and SEM analyses to explain the variations in the properties. Co-doping of TiO2 and Al2O3 to 3Y-TZP did not have an influence on the phases present, but decreased the grain size. The co-doping also affected the cell attachment and the growth on the surface of the zirconia ceramics.


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