Grain-size dependence of Snoek peaks in niobium |
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Authors: | M. S. Ahmad Z. C. Szkopiak |
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Affiliation: | (1) Department of Metallurgy and Materials Technology, University of Surrey, Guildford, Surrey, UK |
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Abstract: | The effect of grain size on the oxygen and nitrogen Snoek peaks in niobium has been studied. It has been observed that the conversion factor K given by C = K max, where C is the concentration of oxygen or nitrogen and max the height of the corresponding Snoek peak, is concentration independent up to about 0.06 and 0.04 wt % oxygen and nitrogen respectively.The variation of K with grain size (d) obeys the relationship K = K0 + kKd–1/2, where K0 represents the value of K for an aggregate of crystals without boundaries and kK the grain size dependence of K. |
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