Original scientific paper

Bond Strength of the Gold Alloy-Hydrothermal Ceramic Interface

Jasenka Živko-Babić
Josip Pandurić
Indof Janez
Ivaniš Tomislav
Schauperl Zdravko

Abstract

The aim of the study was to determine whether the rate of cooling induced structural changes in a high-gold alloy, and whether these changes modified the bond strength between the gold alloy and hydrothermal ceramic. Before ceramic firing, the casts were submitted to fast (water), normal (air) or slow (in the furnace) cooling. Three-point bending test was used in a total of 15 specimens of defined dimensions. The ultimate force at which ceramic detachment from the metal surface occurred and bending strength were determined. The values of coefficient (k) and surface (S) as factors in the assessment of bond quality were calculated. Photographs of the specimen microstructure were made and values of the microhardness of both materials determined. Analysis of variance (ANOVA) revealed no statistically significant difference in bond strength among the three types of specimens, suggesting that the mode of alloy cooling had no substantial effect either on the microstructure of the high-gold alloy or on the quality of bond between the gold alloy and hydrothermal ceramic.

Keywords

gold alloy; hydrothermal ceramic; bond strength

Hrčak ID:

11152

URI

https://hrcak.srce.hr/11152

Publication date:

15.6.2001.

Article data in other languages: croatian

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