Original scientific paper
Influence of Thermal Cycling on the Fatigue Strength of the Interface between Ag-Pd Alloys and Hydrothermal Ceramics
Renata Poljak-Guberina
; Privatna stomatološka ordinacija, Zagreb, Hrvatska
Adnan Ćatović
; Zavod za fiksnu protetiku Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Vjekoslav Jerolimov
; Zavod za mobilnu protetiku Stomatološki fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Mladen Franz
; Zavod za materijale Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu, Zagreb, Hrvatska
Abstract
The purpose of the present paper was to investigate the influence of thermocycling on the fatigue strength of the Ag-Pd alloy and hydrothermal ceramics interface. The investigation was performed on 48 samples made o f Ag-Pd alloy frames (45x12x4 mm) on which the hydrothermal ceramics were fused (25x12x2 mm). The specimens were divided into two groups. The first group o f samples was dynamically loaded immediately after working, while the other group o f samples was thermocycled (1000 times at 0 °C and 55 °C) before dynamic loading. The dynamic loading tests were carried out by using the modified three- -point load method by Schwickerath in Amsler’s high-frequency pulsator. The determined dynamic loading limit was up to 550N for thermocycled samples, and up to 850N for non-thermocylied samples. A statistically significant difference between maximal dynamic forces and the number o f loading cycles for both groups o f samples was determined .
Keywords
metalceramics; fatigue strength; thermocycling
Hrčak ID:
98248
URI
Publication date:
15.12.1998.
Visits: 1.615 *