Kinetics of defect recovery and long-range ordering in Ni3Al + B—II. Atomic jump processes studied by “order-order” relaxation experiments

1996 ◽  
Vol 44 (4) ◽  
pp. 1573-1579 ◽  
Author(s):  
R. Kozubski ◽  
W. Pfeiler
Keyword(s):  
Long Range ◽  
Jump Processes ◽  
Relaxation Experiments ◽  
Defect Recovery ◽  
Long Range Ordering ◽  
Kinetics Of

Evidence of a Correlation Between the Transition Temperature for Ordering and the Activation Energy for Ordering Kinetics in Ni75Al25-xFex Superalloys

1990 ◽  
Vol 205 ◽  
Author(s):  
R. Kozubski ◽  
J. Soltys ◽  
M.C. Cadeville ◽  
V. Pierron-Bohhes
Keyword(s):  
Activation Energy ◽  
Transition Temperature ◽  
Long Range ◽  
Theoretical Models ◽  
Considerable Effect ◽  
Ordering Kinetics ◽  
Current Value ◽  
Long Range Ordering ◽  
Kinetics Of

AbstractKinetics of long-range ordering was studied in the alloys Ni75Al25-xFex by means of in situ resistometry. The alloys under consideration exhibit a dramatic decrease of the "order-disorder" transition temperature Ttr with increasing X. After the existing theoretical models, the activation energy of long-range ordering should depend on one hand on the energy of ordering - related to Ttr -, and on the other hand, on the current value of the LRO degree. The performed measurements yield an experimental evidence of the above relationships. In addition, a considerable effect of magnetic order on LRO kinetics has also been registered. The results are qualitatively discussed in terms of the model of LRO kinetics in L12 structure proposed by Schoijet and Girifalco.

Short and Long-Range Ordering of (Ni0.67Cr0.33)1-xFex Alloys Under Electron Irradiation

1996 ◽  
Vol 439 ◽  
Author(s):  
E. Frely ◽  
B. Beuneu ◽  
A. Barbu ◽  
G. Jaskierowicz
Keyword(s):  
Electron Microscope ◽  
Transition Temperature ◽  
Long Range ◽  
Model Alloy ◽  
Resistivity Measurements ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
Superlattice Peak ◽  
Long Range Ordering ◽  
Kinetics Of

Abstract(Ni0.67Cr0.33)1-xFex alloys with x = 0, 5 and 10 at.%, have been irradiated at temperatures between 300°C and 500°C with the electrons of a 2.5MeV Van de Graaff accelerator and of a 1MeV High Voltage Electron Microscope (HVEM). All of them have been successively ordered at short and at long range under irradiation. The transition temperature is 525°C for Ni0.61Cr0.34Fe0.05 and 445°C for Ni0.59Cr0.31Fe0.10. An Inconel sample irradiated up to 1 d.p.a. in the 1MeV microscope did not show any superlattice peak although its composition is very close to the 10% iron model alloy. The kinetics of ordering has been followed by resistivity measurements and fitted by the Dienes kinetic model.

Kinetics of Ordering in Cu3Au

1997 ◽  
Vol 481 ◽  
Author(s):  
H. Lang ◽  
W. Pfeiler
Keyword(s):  
Long Range ◽  
Heat Treatments ◽  
Antiphase Boundaries ◽  
Order And Disorder ◽  
Initial States ◽  
Isothermal Heat Treatments ◽  
Long Range Ordering ◽  
Kinetics Of

ABSTRACTL12-long-range ordering (LRO) was studied by residual resistometry in Cu3Au. Variations of LRO-parameter were produced by isochronal and isothermal heat treatments for different initial states of order. By comparison of order-order and disorder-order relaxations, the contributions to ordering of atomic jumps within ordered domains and of antiphase boundaries were separated. Analysing isothermal annealings yielded ordering energies of vacancies involved.

CRITICAL STRESS-INDUCED RELAXATION IN RELATION TO LONG-RANGE ORDERING, IN Au3Cu, AND SELF-INDUCED ORDERING, IN AuNi SOLID SOLUTIONS

1987 ◽  
Vol 48 (C8) ◽  
pp. C8-519-C8-524
Author(s):  
G. RENAUD ◽  
M. BELAKHOVSKY ◽  
J. HILLAIRET ◽  
M. WUTTIG ◽  
G. BESSENAY ◽  
...  
Keyword(s):  
Long Range ◽  
Solid Solutions ◽  
Critical Stress ◽  
Long Range Ordering

Relationship between low-Q peak and long-range ordering of ionic liquids revealed by high-energy X-ray total scattering

2015 ◽  
Vol 17 (27) ◽  
pp. 17838-17843 ◽  
Author(s):  
Kenta Fujii ◽  
Shinji Kohara ◽  
Yasuhiro Umebayashi
Keyword(s):  
Ionic Liquids ◽  
Long Range ◽  
High Energy ◽  
Real Space ◽  
Space Structure ◽  
Total Scattering ◽  
X Ray ◽  
Peak Intensity ◽  
Long Range Ordering

A new function, SQpeak(r); a connection between low-Q peak intensity with real space structure.

Long-range ordering in the Bi1−xAexFeO3−x/2 perovskites: Bi1/3Sr2/3FeO2.67 and Bi1/2Ca1/2FeO2.75

2008 ◽  
Vol 181 (10) ◽  
pp. 2601-2609 ◽  
Author(s):  
C. Lepoittevin ◽  
S. Malo ◽  
N. Barrier ◽  
N. Nguyen ◽  
G. Van Tendeloo ◽  
...  
Keyword(s):  
Long Range ◽  
Long Range Ordering
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