The Surface Entropy of Solid Metals

Abstract

Published zero-creep data are re-analysed to determine the surface entropy and its statistical error for the five solid metals so far studied. The statistical error is typically high (∼ ± 100 %) because experimental difficulties have restricted the number and accuracy of observations from which each entropy value is derived. A range of values up to 3 ergs/cm²/degC is obtained, in contrast to the generally accepted figure of 0.5 erg/cm²/degC based on earlier work. These are compared with some theoretical estimates and with corresponding liquid-metal data. It is concluded that the available zero-creep results are insufficiently reliable to allow assessment of theoretical results or to permit useful comparisons with the liquid state.

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