Original scientific paper
Influence of Different Surface Preparations of Ag- Pd Maryland Bridge Constructions on Dynamic Strength of the Composite-Metal Interface
Miroslav Miličević
; Privatna stomatološka ordinacija
Adnan Ćatović
; School of Dental Medicine, University of Zagreb, Zagreb, Croatia
Franjo Kovačiček
; Zavod za materijale Fakulteta strojarstva i brodogradnje Sveučilišta u Zagrebu
Abstract
The aim of this study was to investigate experimentally the effect of three different forms of metal bases (Pd-Ag) of Mary land bridges on the dynamic strength of the metal - composite interface. The study was carried out on 98 metal roller specimens. Three groups of specimens were investigated: netlike, electrochemically etched and sand-blasted. All specimens were dynamically loaded in an Amsler high frequency pulsator with gradual increasing of the working forces until the limits of their endurance. Metal roller specimens were loaded in a duration o f1.300,000 cycles. Results of dynamic loading showed the netlike specimens to have the most dynamic resistance of the metal-composite interface. Dynamic loading of the sand-blasted specimens was the weakest. Statistical analysis showed negative correlation between the strain and number of cycles in all the three groups of metal roller specimens.
Keywords
Maryland bridge; metal-composite interface; dynamic strength
Hrčak ID:
99102
URI
Publication date:
15.3.1995.
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