Abstract
We discuss the time evolution of local changes in the alloy composition (Formula presented) and in the degree of long-range order (Formula presented) under irradiation with energetic particles. Coupled kinetic equations for (Formula presented) and (Formula presented) are derived in the time-dependent Ginzburg-Landau forms, taking into account the irradiation-induced atomic mixing and disordering as well as the irradiation-enhanced diffusion and ordering. At first, we obtain the model phase diagrams of stationary states under appropriate conditions of irradiation. It is shown how the ordering phase field and the miscibility gap between ordered and disordered phases depend on the irradiation conditions. Next, we demonstrate some examples of the simulation of the dissolution process from the two-phase mixture of (order+disorder) into a single-phase state. At a relatively low temperature, the ordered phase is first disordered and then the composition modulation disappears by dissolution. In contrast, the disordering and the dissolution proceed simultaneously at higher temperatures.
| Original language | English |
|---|---|
| Pages (from-to) | 6184-6193 |
| Number of pages | 10 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 54 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Jan 1 1996 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Kinetics of irradiation-induced phase transformations in tricritical systems. / Matsumura, Syo; Müller, Stephan; Abromeit, Christian.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 54, No. 9, 01.01.1996, p. 6184-6193.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Kinetics of irradiation-induced phase transformations in tricritical systems
AU - Matsumura, Syo
AU - Müller, Stephan
AU - Abromeit, Christian
PY - 1996/1/1
Y1 - 1996/1/1
N2 - We discuss the time evolution of local changes in the alloy composition (Formula presented) and in the degree of long-range order (Formula presented) under irradiation with energetic particles. Coupled kinetic equations for (Formula presented) and (Formula presented) are derived in the time-dependent Ginzburg-Landau forms, taking into account the irradiation-induced atomic mixing and disordering as well as the irradiation-enhanced diffusion and ordering. At first, we obtain the model phase diagrams of stationary states under appropriate conditions of irradiation. It is shown how the ordering phase field and the miscibility gap between ordered and disordered phases depend on the irradiation conditions. Next, we demonstrate some examples of the simulation of the dissolution process from the two-phase mixture of (order+disorder) into a single-phase state. At a relatively low temperature, the ordered phase is first disordered and then the composition modulation disappears by dissolution. In contrast, the disordering and the dissolution proceed simultaneously at higher temperatures.
AB - We discuss the time evolution of local changes in the alloy composition (Formula presented) and in the degree of long-range order (Formula presented) under irradiation with energetic particles. Coupled kinetic equations for (Formula presented) and (Formula presented) are derived in the time-dependent Ginzburg-Landau forms, taking into account the irradiation-induced atomic mixing and disordering as well as the irradiation-enhanced diffusion and ordering. At first, we obtain the model phase diagrams of stationary states under appropriate conditions of irradiation. It is shown how the ordering phase field and the miscibility gap between ordered and disordered phases depend on the irradiation conditions. Next, we demonstrate some examples of the simulation of the dissolution process from the two-phase mixture of (order+disorder) into a single-phase state. At a relatively low temperature, the ordered phase is first disordered and then the composition modulation disappears by dissolution. In contrast, the disordering and the dissolution proceed simultaneously at higher temperatures.
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U2 - 10.1103/PhysRevB.54.6184
DO - 10.1103/PhysRevB.54.6184
M3 - Article
AN - SCOPUS:0001335158
VL - 54
SP - 6184
EP - 6193
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 9
ER -