Alloy-oxide equilibria in the system Pt-Rh-O |
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| Authors: | K T Jacob Shashank Priya Yoshio Waseda |
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| Affiliation: | (1) Department of Metallurgy, Indian Institute of Science, 560 012 Bangalore, India;(2) Research Centre for Metallurgical Process Engineering, Institute for Advanced Materials Processing, Tohoku University, 980-77 Sendai, Japan |
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| Abstract: | The composition of Pt-Rh alloys that co-exist with Rh2O3 in air have been identified by experiment at 1273 K. The isothermal sections of the phase diagram for the ternary system Pt-Rh-O at 973 K and 1273 K have been computed based on experimentally determined phase relations and recent thermodynamic measurements on Pt1−X Rh X alloys and Rh2O3. The composition dependence of the oxygen partial pressure for the oxidation of Pt1−X Rh X alloys at different temperatures, and temperature for the oxidation of the alloys in air are computed. The diagrams provide quantitative information for optimization of the composition of Pt1−X Rh X alloys for high temperature application in oxidizing atmospheres. |
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| Keywords: | System Pt-Rh-O phase diagram thermodynamic properties Pt-Rh alloys oxidation stability field |
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