Oxide Compounds on Ni-Cr Alloys

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Abstract
Five Ni-Cr alloys were studied in order to identify the compounds formed on the alloy surface during oxidation under conditions similar to those encountered during dental laboratory procedures prior to application of porcelain. After the alloys were oxidized, the films covering the surfaces were removed with the aid of a Brmethanol solution. X-ray diffraction was used to analyze the compounds formed. Oxides of nearly all elements contained by the alloys were found after low-temperature (650°C) oxidation, while NiO and particularly Cr203 were predominant after oxidation at high temperatures (1000°C).

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