Thermal Conductivity of Dilute Copper Alloys

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Abstract
Lattice thermal conductivities between 10 and 90°K of three copper-tin and five dilute ternary copper base alloys are deduced from measurements of the total thermal conductivity and residual resistivity. The reduction in the lattice thermal conductivity above 40°K is in fair agreement with theoretical estimates which assume that the major effect of solutes on lattice thermal conductivity is through anisobaric phonon scattering. Below 20°K the lattice thermal conductivity is diminished in relation to the residual electrical resistivity, in agreement with a theory due to Pippard and elaborated by Lindenfeld and Pennebaker.

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