Abstract
Optical and electron microscopy, x-ray spectral microanalysis, and thermogravimetric analysis in combination with differential scanning calorimetry are used to study the high-temperature oxidation behavior of alloy HP40NbTi of the Fe – 25Cr – 35Ni system prepared by static and centrifugal casting, and also oxidation process kinetics. It is shown that high-temperature oxidation of refractory alloy HP40NbTi is a complex physicochemical process that apart from temperature and time of the process is determined by the degree of alloy structure fineness.
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