Premium
Oxidation of a gold‐palladium PFM alloy
Author(s) -
VRIJHOEF M. M. A.,
ZEL J. M.
Publication year - 1988
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1988.tb00161.x
Subject(s) - palladium , gold alloys , gold alloy , alloy , metallurgy , materials science , chemistry , organic chemistry , catalysis
Summary In this study, the influence of oxygen pressure, as well as oxidation time and temperature, on the oxide formation of a gold‐palladium‐indium‐gallium alloy was investigated. After oxidation (vacuum/air, 1–10 min, 940–1020°C) the oxides were removed selectively by means of leaching in 37% hydrochloric acid. Concentrations of the metallic parts of the oxide layers were determined by means of an emission spectrometer. The composition of the oxide layer was computed on the basis of these measurements. Palladium oxide was not found. The formation of In 2 O 3 and Ga 2 O 3 was detected. The oxidation time did not influence the composition of the oxide layer. A higher oxidation temperature gave a slightly greater In 2 O 3 concentration. Oxidation in vacuum resulted in a much higher Ga 2 O 3 content. Under all conditions gallium oxidized preferentially.