The variation of thermal oxidation resistance across certain binary systems
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Isochronal oxidation tests have been carried out on numerous compositions based on copper and silver with elements forward in the Periodic Table and compositions based on aluminium and zinc passing back. Variability across the various systems is such that three composition ranges may be defined; the first is the terminal solution where the oxidation parameter, Tp, rises from a value typical of a metal to that of a non-metal, a second where non-metal behaviour is the norm, and a third where Tp rises in the liquid state to that of the later B element. The results, in particular the rise in the terminal solid solution, are discussed with respect to concepts such as s-d resonance, Fajans' rule, and the limits of the zone of influence of the composite divide. A postscript discusses the fall in oxidation resistance of molten aluminium when alloying elements are present.
KeywordsOxidation Polymer Copper Aluminium Zinc
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