Abstract
Oxidation tests of Ni alloys with additions of Zr and Y were carried out at 1000° C under low oxygen partial pressure. Oxidation kinetics as well as particle morphologies and structures were investigated by scanning-electron microscopy, energy-dispersive X-ray analysis and X-ray diffraction. Internal oxidation was observed under all circumstances. The kinetics of the internal oxidation was determined. A binary Ni–Zr alloy shows in situ internal oxidation according to theory. Yttrium was found to have a strong influence on the oxidation kinetics. Even minor Y contents considerably accelerate internal oxidation. Fast internal oxidation of ternary Ni–Zr–Y alloys can not be explained by standard internal oxidation theory.
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Kloss, B., Wenderoth, M., Glatzel, U. et al. Fast Internal Oxidation of Ni–Zr–Y Alloys at Low Oxygen Pressure. Oxidation of Metals 61, 239–251 (2004). https://doi.org/10.1023/B:OXID.0000025333.36579.b9
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DOI: https://doi.org/10.1023/B:OXID.0000025333.36579.b9