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KMID : 0362120120340040361
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Journal of Technologic Dentistry
2012 Volume.34 No. 4 p.361 ~ p.368
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Composition of nickel-chromium alloy on the centrifugal casting and the influence of quantitative of oxides on the casting temperature
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Kim Won-Soo
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Abstract
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Purpose: The aim of this study was to analysis the composition on the centrifugal casting and the oxide on the casting temperature.
Methods: The nickel based alloy were used in this study. Wax pattern specimens (10*10*2) were invested with phosphate-bonded investment in metal rings, the liquid/powder ratio and overall burn-out schedules for these investments were followed in accordance with the manufacturer’s instructions. After casting, the alloy specimens were evaluated as regards composition(EPMA). The casting temperatures were as follows: 1400℃ and 1700℃. The quantitative analysis of oxides were scanning electron microscope(SEM), energy dispersive spectroscopy(EDS) and line scanning.
Results: Nearer the injection lines showed that there is a large amount of nickel. Quantitative of oxides of Ni-Cr alloy cast from 1400℃ is lager than Ni-Cr alloy cast from 1700℃
Conclusion: Casting when using a centrifugal casting machine centrifugal force affects the composition of the alloy. The higher the temperature, the amount of oxide that is generated many.
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KEYWORD
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Beryllium, Casting, Dental alloy, Ni-Cr alloy
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