Thermoelectromotive force of hafnium at plastic deformation in regime of creep at temperature of 300 K

TL;DR

This study measures the thermoelectromotive force and resistivity of polycrystalline hafnium during creep deformation at 300 K, revealing how deformation mechanisms influence electron scattering and demonstrating the diagnostic value of thermoelectromotive force measurements.

Contribution

It introduces the use of thermoelectromotive force measurements as a more informative method for characterizing hafnium's deformation behavior compared to resistivity measurements.

Findings

Thermoelectromotive force varies with deformation mechanism.

Deformation affects electron scattering on structural defects.

Thermoelectromotive force measurement is more informative than resistivity.

Abstract

The thermoelectromotive force and electrical resistivity of the polycrystalline hafnium (Hf) with the grain size of 10 {\mu}m during the process of plastic deformation in the regime of creep at the temperature of 300 K are precisely measured. It is shown that the thermoelectromotive force depends on the deformation mechanism nature, because of the changing magnitude of the electrons scattering on the different structural defects in the hafnium crystal lattice at the deformation process. The main research conclusion is that the method of thermoelectromotive force measurements is more informative, comparing to the method of electric resistivity measurements in the process of accurate characterization of the hafnium.