Journal of Dental Research, Vol 63, 1332-1334, Copyright © 1984 by International & American Associations for Dental Research Online Journals
Oxide compounds on Ni-Cr alloys
G. R. Baran
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 Br-methanol 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 degrees C)
oxidation, while NiO and particularly Cr2O3 were predominant after
oxidation at high temperatures (1000 degrees C).