TY - JOUR

T1 - Effect of grain boundaries on the electron work function of ultrafine grained aluminum

AU - Orlova, T. S.

AU - Ankudinov, A. V.

AU - Mavlyutov, A. M.

AU - Resnina, N. N.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The electron work function (EWF) of ultrafine grained (UFG) aluminum structured by high pressure torsion (HPT) has been investigated. For the first time, the dependence of the EWF on the specific length of grain boundaries (or the grain size) for UFG Al has been obtained. The change of average grain size was achieved by short term annealing of HPT-processed aluminum at different temperatures from the range 90–400 °C. It has been shown that the state of grain boundaries (GBs) affects the magnitude of the EWF. It has been found that the transformation of GBs due to annealing at 90 °C from a nonequilibrium to more equilibrium state while maintaining the specific length of GBs and their average misorientation is accompanied by a decrease in average GB specific energy by 0.3 J m -2 . This transition provides a sharp increase in the EWF of the UFG Al by 0.25 eV.

AB - The electron work function (EWF) of ultrafine grained (UFG) aluminum structured by high pressure torsion (HPT) has been investigated. For the first time, the dependence of the EWF on the specific length of grain boundaries (or the grain size) for UFG Al has been obtained. The change of average grain size was achieved by short term annealing of HPT-processed aluminum at different temperatures from the range 90–400 °C. It has been shown that the state of grain boundaries (GBs) affects the magnitude of the EWF. It has been found that the transformation of GBs due to annealing at 90 °C from a nonequilibrium to more equilibrium state while maintaining the specific length of GBs and their average misorientation is accompanied by a decrease in average GB specific energy by 0.3 J m -2 . This transition provides a sharp increase in the EWF of the UFG Al by 0.25 eV.

UR - http://www.scopus.com/inward/record.url?scp=85064178785&partnerID=8YFLogxK

U2 - 10.1515/rams-2018-0053

DO - 10.1515/rams-2018-0053

M3 - Article

AN - SCOPUS:85064178785

VL - 57

SP - 110

EP - 115

JO - Reviews on Advanced Materials Science

JF - Reviews on Advanced Materials Science

SN - 1606-5131

IS - 1

ER -