ISSN:
1573-4889
Keywords:
logarithmic
;
power law
;
Rh2O3
;
hexagonal
;
orthorhombic
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The oxidation kinetics of Rh were measured in air at 1 atm. in the temperature range 600–1000°C. The oxidation weight gain proceeds logarithmically at the lower temperatures (600°C, 650°C) followed by a transition to power law behavior at the higher temperatures (≥800°C). The logarithmic growth kinetics result from thickening of a hexagonal Rh2O3 scale. The transition from logarithmic to power law growth kinetics occurs in the range 700–800°C, and reflects thickening of hexagonal and orthorhombic Rh2O3 scales. Above 800°C, the growth kinetics result from thickening of a predominately orthorhombic Rh2O3 scale. At 1000°C the oxide becomes volatile, leaving the metal surface exposed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00664336
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