Lattice instability in the solid-state amorphization of Fe(Al) solid solutions by mechanical alloying

1997 ◽  
Vol 56 (5) ◽  
pp. 2302-2305 ◽  
Author(s):  
H. W. Sheng ◽  
Y. H. Zhao ◽  
Z. Q. Hu ◽  
K. Lu
Keyword(s):  
Solid State ◽  
Mechanical Alloying ◽  
Solid Solutions ◽  
Lattice Instability ◽  
State Amorphization

Electron-irradiation-induced solid-state amorphization in supersaturated Ni–Zr solid solutions

2011 ◽  
Vol 19 (4) ◽  
pp. 511-517 ◽  
Author(s):  
Takeshi Nagase ◽  
Kazuya Takizawa ◽  
Yukichi Umakoshi
Keyword(s):  
Solid State ◽  
Solid Solutions ◽  
Electron Irradiation ◽  
State Amorphization

High pressure solid state amorphization of Si, Ge and solid solutions Si:GaAs, Ge:GaSb

1994 ◽  
Vol 13 (1-3) ◽  
pp. 47-49 ◽  
Author(s):  
V. V. Brazhkin ◽  
A. G. Lyapin ◽  
S. V. Popova ◽  
R. N. Voloshin
Keyword(s):  
High Pressure ◽  
Solid State ◽  
Solid Solutions ◽  
State Amorphization

Mathematical Modeling of Solid-State Diffusion during Mechanical Alloying

2006 ◽  
Vol 249 ◽  
pp. 105-110 ◽  
Author(s):  
Boris B. Khina ◽  
Boleslaw Formanek
Keyword(s):  
Plastic Deformation ◽  
Solid State ◽  
Mechanical Alloying ◽  
Solid Solutions ◽  
Point Defects ◽  
Physical Mechanism ◽  
Solid State Diffusion ◽  
State Diffusion ◽  
Wide Range ◽  
Supersaturated Solid Solutions

It is known experimentally that solid-state interdiffusion is substantially enhanced during plastic deformation. This is especially noticeable in Mechanical Alloying (MA) which is used for producing a wide range of metastable materials (supersaturated solid solutions, amorphous phases, nanostructures) with unique properties. However, a physical mechanism of enhanced diffusion during MA is not clearly understood yet, and a comprehensive model of this complex phenomenon has not been developed so far. Moreover, the role of the diffusion process in MA is hotly debated in literature. In this work a new, self-consistent mathematical model of solid-state interdiffusion in a binary substitutional system A-B during periodic plastic deformation is developed. The model includes basic physical factors that affect diffusion, such as generation of non-equilibrium point defects by gliding screw dislocations during deformation and their relaxation in periods between impacts. The cross-link terms are considered, and interaction of point defects with edge dislocations and incoherent phase boundary A/B is taken into account. Computer simulation is performed using realistic data (e.g., quasi-equilibrium self-diffusion coefficients known in literature) and the process parameters typical of MA in a vibratory mill. A repeated “deformation-rest” cycle is considered. The results of modeling reveal the physical mechanism of the enhancement of solid-state diffusion by periodic plastic deformation during MA and demonstrate that within the frame of this approach supersaturated solid solutions can form within a reasonably short processing time.

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