Abstract
AbstractThe paper is devoted to an analysis of experimental data obtained as a result of investigation of an influence of the impurity nature on the failure of a model material of a high purity under condition of its thermocyclic treatment and high temperature creep. The fact that impurities promote the process of cavity formation was known long ago. However, since investigations were conducted with commercial materials, which had a variety of impurities, it was impossible to investigate the influence of each chemical element separately on the phenomenon in the presence of other additives. Experimental studies are described that have clarified what sort of impurities are responsible for the phenomenon of cavity formation, in what way they act in combination, over which temperature interval, whether neutralisation of them is possible and how this neutralisation can be achieved.
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