scholarly journals Thermal vacancy formation andD03ordering in nanocrystalline intermetallic(Fe3Si)95Nb5

2001 ◽  
Vol 63 (13) ◽  
Author(s):  
L. Pasquini ◽  
A. A. Rempel ◽  
R. Würschum ◽  
K. Reimann ◽  
M. A. Müller ◽  
...  
Keyword(s):  
Vacancy Formation ◽  
Thermal Vacancy

Thermal vacancy formation and positron–vacancy interaction in Ti3Al at high temperatures

1996 ◽  
Vol 80 (2) ◽  
pp. 724-728 ◽  
Author(s):  
R. Würschum ◽  
E. A. Kümmerle ◽  
K. Badura‐Gergen ◽  
A. Seeger ◽  
Ch. Herzig ◽  
...  
Keyword(s):  
High Temperatures ◽  
Vacancy Formation ◽  
Thermal Vacancy

Thermal vacancy formation enthalpy of random solid solutions: The FePt case

2018 ◽  
Vol 143 ◽  
pp. 206-211 ◽  
Author(s):  
H.B. Luo ◽  
Q.M. Hu ◽  
J. Du ◽  
A.R. Yan ◽  
J.P. Liu
Keyword(s):  
Solid Solutions ◽  
Formation Enthalpy ◽  
Vacancy Formation ◽  
Thermal Vacancy

Crystallization and Thermal Vacancy Formation in Fe73.5Si13,5B9Nb3Cu1 and Zr65Cu17.5Ni10Al7.5

1997 ◽  
Vol 255-257 ◽  
pp. 530-532 ◽  
Author(s):  
R. Dittmar ◽  
R. Würschum ◽  
W. Ulfer ◽  
Hans Eckhardt Schaefer
Keyword(s):  
Vacancy Formation ◽  
Thermal Vacancy

Thermal vacancy formation in Co-based Heusler-type alloys Co2MnZ (Z=Si, Ge, Sn)

2009 ◽  
Vol 480 (2) ◽  
pp. 462-468 ◽  
Author(s):  
M. Kogachi ◽  
S. Kikuchi ◽  
T. Fujiwara ◽  
F. Hori
Keyword(s):  
Vacancy Formation ◽  
Thermal Vacancy

Lattice-Gas-Decomposition Model for Vacancy Formation Correlated with B2 Atomic Ordering in Intermetallics

2008 ◽  
Vol 1128 ◽  
Author(s):  
A. Biborski ◽  
L. Zosiak ◽  
R. Kozubski ◽  
V. Pierron-Bohnes
Keyword(s):  
Monte Carlo ◽  
Lattice Gas ◽  
Defect Formation ◽  
Vacancy Concentration ◽  
Kinetic Monte Carlo ◽  
Thermodynamic Formalism ◽  
Pair Interaction ◽  
Vacancy Formation ◽  
Atomic Ordering ◽  
Thermal Vacancy

AbstractThermal vacancy formation correlated with atomic ordering was modelled in B2-ordering A-B binary intermetallics. Ising Hamiltonian was implemented with a specific thermodynamic formalism for thermal vacancy formation based on the phase equilibria in a lattice gas composed of atoms and vacancies. Extensive calculations within the Bragg-Williams approximation [1] were followed by Semi-Grand Canonical Monte Carlo (SGCMC) simulations. It has been demonstrated that for the atomic pair-interaction energies favouring vacancy formation on A-atom sublattice, equilibrium concentrations of vacancies and antisite defects result mutually proportional in well defined temperature ranges. The effect observed both in stoichiometric and non-stoichiometric (both A-rich and B-rich) binary alloys was interpreted as a tendency for triple defect formation. In B-rich alloys vacancy concentration did not extrapolate to zero at 0 K, which indicated the formation of constitutional vacancies. Energetic conditions for the occurrence of the effects were analysed in detail. The modelled temperature dependence of vacancy concentration in the B2-ordering A-B binaries with triple defects will be included in the Kinetic Monte Carlo (KMC) simulations of chemical ordering kinetics in these systems with reference to the experimental results obtained for NiAl [2].

Thermal Vacancy Formation and Self-Diffusion in IntermetallicFe3SiNanocrystallites of Nanocomposite Alloys

1997 ◽  
Vol 79 (24) ◽  
pp. 4918-4921 ◽  
Author(s):  
R. Würschum ◽  
P. Farber ◽  
R. Dittmar ◽  
P. Scharwaechter ◽  
W. Frank ◽  
...  
Keyword(s):  
Vacancy Formation ◽  
Self Diffusion ◽  
Thermal Vacancy
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