Materials and Corrosion · 2012 · 15 citations · 19 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials CharacterizationMetallurgySurface ScienceAlloysHigh-temperature MaterialsHigh-temperature OxidationMetalsOxidation ResistanceSurface OxidationAlloy OxidationHigh-temperature Oxidation ResistanceIsothermal OxidationOxidationOxidation BehaviorOxidation KineticsParabolic Rate LawScale Spallation
Abstract In the present paper, the isothermal oxidation behavior of alloy HK40 in H 2 H 2 O atmosphere in the temperature range 850–950 °C was systematically investigated by means of TGA, XRD, SEM, and EDS. The results demonstrated that the oxidation of alloy HK40 under low oxygen partial pressure obeyed a cubic instead of parabolic rate law. The values of the oxidation rate constant k at 850, 900, and 950 °C were 0.0079, 0.01886 and 0.04031 mg 3 /(cm 6 h) at 850, 900, and 950 °C, respectively. The scales were composed of MnCr 2 O 4 and Cr 2 O 3 . MnCr 2 O 4 mainly existed in the form of blades in the outer part of the scale and its amount gradually increased with increasing temperature. In addition, there were silica particles along the scale/metal interface and indications were found that they contribute to the improvement of scale spallation resistance at high temperature as found by scratch tests.
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Diffusion of cations in chromia layers grown on iron-base alloys
R. E. Lobnig, Harald Schmidt, K. Hennesen et al. · Oxidation of Metals · 1992 · 384 citations
Natural Sciences, Materials Engineering, Materials Science +12
Oxidation of AISI 304 and AISI 439 stainless steels
A.M. Huntz, A. Reckmann, C. Haut et al. · Materials Science and Engineering A · 2006 · 219 citations · Full text
Natural Sciences, Materials Engineering, Materials Science +14