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  • Segregation and oxidation
    Grabke, Hans Jürgen
    An introduction will be given in the fundamentals of equilibrium segregation, i.e. the enrichment of atoms or ions from solid solution at surfaces, grain boundaries and interfaces, occuring at ... elevated temperatures. Some examples of segregation and cosegregation on iron and iron alloys will be described, especially of sulfur segregation. The role of sulfur in the oxidation of iron, steels and chromia- or alumina-forming high temperature alloys is discussed in tedail, since traces of sulfur can effectively deteriorate the adherence of protective scales on high temperature alloys. Segregation in and on oxides has been studied only for a few cases as yet. Most important is the effect of segregated reactive element ions on the growth mechanism and adherence of chromia and alumina scales.
    Type of material - conference contribution
    Publish date - 2005
    Language - english
    COBISS.SI-ID - 425642