Vacancy formation energies in bcc and fcc stainless steels by positron annihilation

1983 ◽  
Vol 61 (1) ◽  
pp. 140-145 ◽  
Author(s):  
S. M. Kim ◽  
W. J. L. Buyers
Keyword(s):  
Temperature Dependence ◽  
Positron Annihilation ◽  
Stainless Steels ◽  
Theoretical Models ◽  
Model Analysis ◽  
Vacancy Formation ◽  
Coincidence Rate ◽  
Annihilation Peak ◽  
Trapping Model ◽  
Formation Energies

The temperature dependence of the positron annihilation peak coincidence rate has been measured in bcc and fcc stainless steels. Trapping model analysis of the data shows that the vacancy formation energies in the bcc stainless steels are about 20% lower than those in the fcc stainless steels. The vacancy formation energies calculated from current theoretical models are about 10–15% larger than those determined experimentally.

Vacancy-formation energies in copper and silver from positron annihilation

1973 ◽  
Vol 44 (1) ◽  
pp. 53-54 ◽  
Author(s):  
J.D. McGervey ◽  
W. Triftshäuser
Keyword(s):  
Positron Annihilation ◽  
Vacancy Formation ◽  
Formation Energies

Vacancy Formation Energies in Plastic Crystals Using Positron Annihilation Techniques

1983 ◽  
Vol 96 (1) ◽  
pp. 197-210 ◽  
Author(s):  
David Lightbody ◽  
John N Sherwood ◽  
Morten Eldrup
Keyword(s):  
Positron Annihilation ◽  
Vacancy Formation ◽  
Plastic Crystals ◽  
Formation Energies

The composition dependence of the effective vacancy formation enthalpy in copper-rich brass as deduced from the threshold temperature for positron trapping in vacancies

1978 ◽  
Vol 56 (8) ◽  
pp. 1077-1083 ◽  
Author(s):  
P. J. Schultz ◽  
T. E. Jackman ◽  
J. Fabian ◽  
E. A. Williams ◽  
J. R. MacDonald ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Positron Annihilation ◽  
Composition Dependence ◽  
Formation Enthalpy ◽  
Vacancy Formation ◽  
Threshold Temperature ◽  
Α Phase ◽  
Linear Decrease ◽  
Zn Concentration ◽  
Bcc Structure

The temperature dependence of the Doppler-broadened positron annihilation lineshape has been measured for 13 brass specimens with compositions varying from 0 to 48% by weight of Zn. The vacancy formation enthalpy deduced from these measurements shows a linear decrease of 22% with increasing Zn concentration through the α phase and a further 31% decrease on changing from fcc to bcc structure.

Vacancy-Formation Energies in Metals from Positron Annihilation

1972 ◽  
Vol 28 (6) ◽  
pp. 358-360 ◽  
Author(s):  
B. T. A. McKee ◽  
W. Triftshäuser ◽  
A. T. Stewart
Keyword(s):  
Positron Annihilation ◽  
Vacancy Formation ◽  
Formation Energies

Phase transformations and vacancy formation energies of transition metals by positron annihilation

1979 ◽  
Vol 20 (2) ◽  
pp. 135-140 ◽  
Author(s):  
H. Matter ◽  
J. Winter ◽  
W. Triftshäuser
Keyword(s):  
Transition Metals ◽  
Phase Transformations ◽  
Positron Annihilation ◽  
Vacancy Formation ◽  
Formation Energies

TEMPERATURE DEPENDENCE BEHAVIOR OF ELECTRICAL RESISTIVITY IN NOBLE METALS AT LOW TEMPERATURES

2014 ◽  
Vol 5 (3) ◽  
pp. 982-992 ◽  
Author(s):  
M AL-Jalali
Keyword(s):  
Experimental Data ◽  
Electrical Resistivity ◽  
Temperature Dependence ◽  
Concentration Dependence ◽  
Low Temperatures ◽  
Noble Metals ◽  
Phonon Scattering ◽  
Theoretical Models ◽  
Residual Resistivity ◽  
Electron Phonon Scattering

Resistivity temperature – dependence and residual resistivity concentration-dependence in pure noble metals(Cu, Ag, Au) have been studied at low temperatures. Dominations of electron – dislocation and impurity, electron-electron, and electron-phonon scattering were analyzed, contribution of these mechanisms to resistivity were discussed, taking into consideration existing theoretical models and available experimental data, where some new results and ideas were investigated.

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