scholarly journals Antiphase domain growth: Correlation functions and structure factors in the scaling regime

2021 ◽  
Vol 104 (9) ◽  
Author(s):  
Ulrike Zweck ◽  
Michael Leitner
Keyword(s):  
Correlation Functions ◽  
Antiphase Domain ◽  
Domain Growth ◽  
Structure Factors

X-ray- and Neutron-diffraction Studies with Quasicrystalline and Amorphous Al-V- and Al-Mn-alloys

1990 ◽  
Vol 45 (5) ◽  
pp. 627-638
Author(s):  
S. Seehafer ◽  
P. Lamparter ◽  
S. Steeb
Keyword(s):  
Neutron Diffraction ◽  
Coordination Number ◽  
Correlation Functions ◽  
Melt Spinning ◽  
Pair Correlation ◽  
Partial Density ◽  
Isomorphous Substitution ◽  
Hard Sphere Model ◽  
X Ray ◽  
Structure Factors

Abstract Amorphous and quasicrystalline samples of Al84Mn16 and Al84V16 were produced by sputtering and melt-spinning, respectively. From X-ray and neutron-diffraction-results the total structure factors were evaluated. For amorphous as well as for quasicrystalline Al84V16 the partial SAl-Al- and SAl-V-structure factors were obtained, which yield the corresponding partial pair correlation functions, the atomic distances, and the partial coordination numbers. Also some information concerning the partial Bhatia-Thornton correlation functions could be obtained. Both the amorphous and the quasicrystalline Al-V-alloys show a linear expansion by a factor of 1.03 compared to the corresponding Al-Mn-alloy. The two amorphous alloys can be designed as isomorphous, whereas the quasicrystalline ones show pronounced deviations in the distance between unequal atoms. The shortest atomic distance in amorphous Al84V16 is 2.69 A, being,formed by Al-V-pairs with a coordination number 2. The nearest Al-Al-distance amounts to 2.84 A with a coordination number 8. The partial density-concentration correlation function clearly deviates from the hard sphere model. With the quasicrystalline specimens, the isomorphous substitution of Mn- and V-atoms is not perfect. The Al-V-correlation is split up, and this is not observed for the Al-Mn-correlation. Comparison of the amorphous and the corresponding quasicrystalline alloy shows some similarities

X-Ray Investigations on Molten Cu-Sb Alloys

1994 ◽  
Vol 49 (4-5) ◽  
pp. 530-534 ◽  
Author(s):  
Th. Halm ◽  
H. Neumann ◽  
W. Hoyer
Keyword(s):  
Electronic Properties ◽  
Structure Factor ◽  
Correlation Functions ◽  
Pair Correlation ◽  
Model Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Factors ◽  
Diffraction Structure ◽  
Eutectic Concentration

Abstract Using X-ray diffraction, structure factors and pair correlation functions of several molten Cu-Sb alloys and pure antimony were determined and compared with published structural, thermodynamic and electronic properties. The eutectic concentration Cu37Sb63 was investigated in dependence on temperature, and a model structure factor was calculated applying a segregation model.

scholarly journals Effect of the vacancy interaction on antiphase domain growth in a two-dimensional binary alloy

1997 ◽  
Vol 56 (9) ◽  
pp. 5261-5270 ◽  
Author(s):  
Marcel Porta ◽  
Carlos Frontera ◽  
Eduard Vives ◽  
Teresa Castán
Keyword(s):  
Binary Alloy ◽  
Antiphase Domain ◽  
Domain Growth ◽  
Two Dimensional

Antiphase domain growth in BCC metallic alloys via vacancies

1994 ◽  
Vol 96 (1) ◽  
pp. 79-86 ◽  
Author(s):  
Carlos Frontera ◽  
Eduard Vives ◽  
Antoni Planes
Keyword(s):  
Antiphase Domain ◽  
Metallic Alloys ◽  
Domain Growth

The Disorder-Order Transformation in Ni4Mo

1971 ◽  
Vol 15 ◽  
pp. 319-329 ◽  
Author(s):  
Fu-Wen Ling ◽  
E. A. Starke
Keyword(s):  
Order Parameter ◽  
Domain Size ◽  
Antiphase Domain ◽  
Domain Growth ◽  
Range Order Parameter ◽  
Line Broadening ◽  
Kcal Mole ◽  
X Ray ◽  
Isothermal Ageing ◽  
Internal Strains

The progressive ordering of a single crystal of Ni4Mo by isothermal ageing at 650°C (transformation temperature = 868°C) has been studied by x-ray line broadening techniques using the Warren- Averbach method employing computer techniques. The long-range-order parameter, antiphase domain size, and internal strains were measured as a function of ordering time and compared with those previously obtained at 700°C. The activation energies for domain growth and ordering were found to be 91 kcal/mole and 44.5 kcal/mole respectively. The rms strain developed during ordering was found to be dependent on the degree of tetragonality of the structure.

Sign in / Sign up

Export Citation Format

Share Document