Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)
- Volume 19 Issue 4
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- Pages.269-279
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- 2003
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- 2384-4353(pISSN)
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- 2384-4272(eISSN)
Mechanical Properties of Precious Metal-Ceramic Alloy Joined by the Laser-Welding and the Soldering Method
레이저 용접과 납착법으로 연결된 귀금속성 금속-도재 합금의 물리적 성질
- Oh, Jung-Ran (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University) ;
- Lee, Seok-Hyung (Samsung Medical Center, College of Medicine, Sungkyunkwan University) ;
- Woo, Yi-Hyung (Department of Prosthodontics, Division of Dentistry, Graduate School, Kyung Hee University)
- Published : 2003.12.30
Abstract
This study investigated the mechanical properties of precious metal-ceramic alloy joined by the laser-welding and the soldering compared with the parent metal. Twenty-four tensile specimens were cast in precious metal-ceramic alloy and divided into three groups of eight. All specimens in the control group(group 1) were left in the as-cast condition. Group 2 and 3 were the test specimens, which were sectioned at the center. Eight of sectioned specimens were joined by soldering with a propane-oxygen torch, and the remaining specimens were joined by laser-welding. After joining, each joint diameter was measured, and then tested to tensile failure on an Instron machine. Failure loads were recorded, and then fracture stress(ultimate tensile strength), 0.2% yield strength and % elongation calculated. These data for three groups were subjected to a one-way analysis of variance(ANOVA). Neuman-Keuls post hoc test was then used to determine any significant differences between groups. The fracture locations, fracture surfaces were examined by SEM(scanning electron microscope). The results were as follows: 1) The tensile strength and 0.2% yield strength of the soldered group(