Results 261 to 270 of about 47,195 (313)

Microstructure development and evolution

International Conference on Simulation of Semiconductor Processes and Devices, 2003. SISPAD 2003., 2003
We employ a level set-based geometry tracking software using a "grain continuum" representation, together with models for selected IC manufacturing processes and for microstructural evolution to study the development of grain structures. We consider electroless deposition, physical vapor deposition and grain boundary migration during curvature-driven ...
M.O. Bloomfield, null Yeon Ho Im, T.S. Cale   +2 more
openaire   +1 more source

Coherent islands and microstructural evolution

Physical Review B, 1993
Strained island growth in lattice-mismatched epitaxial systems differs from relaxed island growth. The total elastic energy of a strained island changes its chemical potential and growth rate. This effect is investigated for an ensemble of misfitting coplanar hemispherical caps interacting through surface diffusion alone.
openaire   +2 more sources

Coupling Microstructure Characterization with Microstructure Evolution

2010
Microstructure reconstruction in 3D and quantitative digital representation are enabling consideration of polycrystalline and multi-phase microstructures in mechanics codes in a realistic way. To take full advantage of these advances, we discuss in this chapter the synergy of coupling quantitative microstructure characterization by experimental imaging
Chen Shen, Ning Ma, Yuwen Cui, Ning Zhou, Yunzhi Wang   +4 more
openaire   +1 more source

Microscale Simulation of Martensitic Microstructure Evolution

Physical Review Letters, 2004
A new model for the evolution of multivariant martensitic microstructure in single crystals and polycrystals is developed. In contrast with Landau-Ginzburg models, which are limited in practice to nanoscale specimens, this new scale-free model is valid for length scales greater than 100 nm and without an upper bound.
Valery I, Levitas, Alexander V, Idesman, Dean L, Preston   +2 more
openaire   +2 more sources

Microstructure evolution in density relaxation by tapping

Physical Review E, 2010
The density relaxation phenomenon is modeled using both Monte Carlo and discrete element simulations to investigate the effects of regular taps applied to a vessel having a planar floor filled with monodisperse spheres. Results suggest the existence of a critical tap intensity which produces a maximum bulk solids fraction.
Anthony D, Rosato, Oleksandr, Dybenko, David J, Horntrop, Vishagan, Ratnaswamy, Lou, Kondic   +4 more
openaire   +2 more sources

Microstructural evolution of buffers

Engineering Geology, 1999
A buffer consisting of blocks of compacted Na bentonite powder absorbs water by which the grains expand and exfoliate, yielding clay gels that occupy the voids between them. The expandability of the grains and thereby the bulk density and hydraulic conductivity depend on the density of the gel fillings and hence on the grain density.
openaire   +1 more source

Microstructural Evolution in Inhomogeneous Elastic Media

Journal of Computational Physics, 1997
A numerical method based on boundary integrals is developed to study the diffusional evolution of microstructures produced by solid state diffusional transformations in elastically stressed binary alloys in two dimensions. The precipitate and matrix phases are isotropic and linearly elastic.
Jou, H.-J., Leo, P. H., Lowengrub, J. S.
openaire   +2 more sources

“Evolution” of microstructure in materials

International Journal of Materials Research, 2008
Abstract The term “evolution” is used in both biology and materials science. There are however large differences in what is meant by it. It will be shown that one difference is the probability of single or multi step nucleation. Biological structures are too complex to be recreatable by nucleation.
openaire   +1 more source

Bridging Simulations and Experiments in Microstructure Evolution

Physical Review Letters, 2003
We demonstrate the importance of anisotropic interface properties in microstructure evolution by comparing computed evolved microstructures to final experimental microstructures of 5170 grains in 19 thin aluminum foil samples. This is the first time that a direct experimental validation of simulation has been performed at the level of individual grains.
M C, Demirel, A P, Kuprat, D C, George, A D, Rollett   +3 more
openaire   +2 more sources

Evolution of Microstructure: an Example

2001
We consider a continuum model for the flow of two phases of different mobility and density in a Hele-Shaw cell or a porous medium. As a consequence of the Saffman-Taylor instability, the phase distribution is thought to develop a microstructure, so that its evolution is effectively unpredictable.
openaire   +1 more source