Grain-Boundary Contribution to the Electrical Resistivity of Iron
- 1 August 1969
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 40 (9) , 3459-3464
- https://doi.org/10.1063/1.1658219
Abstract
The electrical resistivity of irons containing different levels of impurity have been measured at 77° and 293°K for a range of grain sizes. The resistivity of a given iron is found to vary with the grain diameter (d mm) as ρ = A+B log(1/d). A and B are both temperature dependent, increasing with increasing temperature. With increasing impurity content, the parameter A increases and B decreases. Thus the purer iron shows a larger variation of resistivity with grain size than the less pure material. The observed relationship can only be explained in terms of a grain‐boundary scattering process if the effective width of the boundaries is much greater than is usually believed.This publication has 7 references indexed in Scilit:
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