| 1894 Casting of Gold Alloy by a New Argon Casting Machine | ||
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C.-C. HUNG, C.-F. TSAI, P.-L. LAI, C.-C. HUANG, J.-C. WANG, and H.-C. HUNG, Kaohsiung Medical University, Taiwan Objective: Precision casting machines are developed for titanium casting. In this study, the traditional centrifugal casting machine has replaced by an a automatic argon pressure casting machine for evaluation the casting properties of gold alloy. Methods: Type III casting gold (Degular C, Germany) was used for casting alloy. The conventional cristobalite investment (New F-1, Tokuyama, Japan) was used for investing. An automatic argon casting machine (Castmatic-S, Iwatani, Japan) and centrifugal casting machine (Kerr, USA) were used for casting. The marginal accuracy was measured by a microscope. The interfacial reactivity was evaluated by EPMA. The VH and surface roughness were also measured. Data was analyzed with paired t-test and ANOVA. Results: There is a non-significant difference between the casting machine and marginal accuracy (p > 0.05). The composition of Au and Pt show significant difference (p < 0.05) with different machines. The VH of casting shows significant difference with the different casting machines. The roughness of casting shows non-significant difference (p > 0.05) with the different casting machines. Conclusion: New casting machine has ability to replace traditional casting machine. It can provide a safety casting procedure and can produce a high quality casting.
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| Seq #209 - Cast Metals: Dimensional Accuracy & Properties 10:15 AM-11:30 AM, Friday, 12 March 2004 Hawaii Convention Center Exhibit Hall 1-2 | ||
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Back to the Dental Materials: VII - Others-Metallic Program
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