ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The aim of this study was to optimize sintering aids and processing parameters forzirconia toughened alumina (ZTA) nano-ceramics with optimal properties as dental ceramics.Additive agents (TiO2, MgO, SiO2), dry pressing forces and sintering temperatures are veryimportant for preparation of structural ceramics. In the present study, density and Vickers hardnessmeasurement, SEM, and XRD analysis were employed to investigate the effects of these on thefinal products. The relevant results showed that higher pressing force led to an increase in thedensity and Vickers hardness of the sintered ceramics. Among the four groups of sintered nanoceramicswith different ratios of alumina and zirconia, and combinations of additive agents, the bestdensification was achieved in the sample from Group 2# containing 1.05wt% MgO after sintered at1450ºC, as indicated by SEM observation. XRD analysis confirmed the formation of MgAl2O4 as anintermediate compound. The existence of TiO2 in the additive agents was in favor of the acquisitionof high densification. The measured values for the density and Vickers hardness indicated that thesintered ZTA nano-ceramics would be a potential material for dental prosthetic applications
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.1369.pdf
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