Original scientific paper
The Influence of Temperature During Ceramic Firing Cycles on the Microstructure of Co-Cr Alloys
Jesenka Živko-Babić
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Marija Jurić
; Zavod za materijale FSB u Zagrebu, Zagreb, Hrvatska
Tomislav Ivaniš
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Hanzi Predanić-Gašparac
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Abstract
Dentalit C is one o f nonprecious alloys introduced to our clinic for ceramicmetall restorations. In the as-cast condition cobalt-chromium alloy has a coarse dendritic structure. The aim o f this study was to determine if the ceramic firing cycles has any influence on the microstructure and on microhardness o f based metal. Twenty one crowns were casted and subjected to common fa zes o f ceramic bake cycles. Microstructure were estimated by light optical and by scanning
electron microscopy. Microhardness was measured by Vickers method with loading o f 1 N. The results showed that the fused temperature has little effect on microstructure changes. Values o f hardness didn’t increase significantly.
Keywords
alloy; microstructure; microhardness
Hrčak ID:
99265
URI
Publication date:
15.3.1994.
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