scholarly journals Direct measurement of anisotropy of interfacial free energy from grain boundary groove morphology in transparent organic metal analog systems

2005 ◽  
Author(s):  
Bryce A Rustwick
Keyword(s):  
Free Energy ◽  
Grain Boundary ◽  
Direct Measurement ◽  
Interfacial Free Energy ◽  
Boundary Groove ◽  
Organic Metal ◽  
Analog Systems

Morphological Changes in Rod-Shaped Precipitates With Internal Boundaries: Finite Difference Analysis

1991 ◽  
Vol 237 ◽  
Author(s):  
Jun-Ho Choy ◽  
S. A. Hackney ◽  
J. K. Lee
Keyword(s):  
Aspect Ratio ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Morphological Changes ◽  
Equilibrium Shape ◽  
Interfacial Free Energy ◽  
Dynamic State ◽  
Shape Evolution ◽  
Boundary Groove ◽  
The Relationship

ABSTRACTShape evolution of rod-shaped precipitates due to surface diffusion has been studied under the conditions of constant volume and isotropie interfacial free energy. The shape evolution depends strongly on both the initial aspect ratio and the grain boundary groove angle. For a finite rod with one grain boundary, the morphology evolves into an equilibrium shape made of spherical portions if its aspect ratio and the groove angle are small. Increase in the aspect ratio causes a boundary splitting. For an infinite rod with periodic boundaries, three types of morphological evolutions are observed. When the relationship between the aspect ratio and the groove angle satisfies a certain critical condition, the shape evolves into an equilibrium. If the relationship deviates significantly from this condition, an ovulation process takes place at each location of the internal grain boundaries. When the deviation is intermediate, the morphology undergoes an oscillation in a quasi-dynamic state between the process toward an equilibrium shape and the ovulation process. The ovulation process due to internal grain boundaries is found to precede the Rayleigh spheroidization process.

Zero Creep Measurements of the Interfacial Free Energy of Ag/Ni Multilayers

1991 ◽  
Vol 239 ◽  
Author(s):  
D. Josell ◽  
F. Spaepen
Keyword(s):  
Thin Films ◽  
Free Energy ◽  
Grain Boundary ◽  
Interfacial Free Energy ◽  
Specific Model ◽  
Diffusional Creep ◽  
Multilayer Thin Films ◽  
Creep Tests ◽  
Creep Measurements ◽  
Microstructural Data

ABSTRACTThe free energy γAgNi associated with an interface between layers of silver and nickel has been experimentally determined. Creep tests were conducted on multilayer thin films to determine the load at which the length of the film neither shrank nor stretched. The interfacial free energy was obtained from this zero creep load and microstructural data using a specific model for the grain boundary diffusional creep in multilayers.

DETERMINATION OF ANISOTROPY OF CRYSTAL-MELT INTERFACIAL ENERGY FROM THE OBSERVED GRAIN BOUNDARY GROOVE SHAPES AT MULTIPLE ORIENTATIONS

2009 ◽  
Vol 16 (04) ◽  
pp. 579-588
Author(s):  
MUSTAFA EROL ◽  
NECMETTİN MARAŞLI ◽  
UĞUR BÖYÜK
Keyword(s):  
Grain Boundary ◽  
Interfacial Energy ◽  
Thermal Gradient ◽  
Pivalic Acid ◽  
Interfacial Free Energy ◽  
In Situ Observation ◽  
Boundary Groove ◽  
Experimental Apparatus ◽  
Solid Liquid ◽  
Crystallographic Orientations

A specialized high-precision thermal gradient furnace with a rotating stage was developed for in situ observation of the equilibrated grain boundary groove shapes at multiple crystallographic orientations in transparent materials. Anisotropies of solid–liquid interfacial free energy for the distillated succinonitrile (SCN) and pivalic acid (PVA) are determined experimentally through direct observation of the equilibrated grain boundary grooves at the multiple crystallographic orientations stabilized within a controlled thermal gradient. The average anisotropies of solid–liquid interfacial energy for distillated SCN and PVA are found to be 0.42 and 3.12% from observed grain boundary groove shapes at multiple crystallographic orientations. Details related to the experimental apparatus and experimental procedures are given.

scholarly journals Curcuminoid-Tailored Interfacial Free Energy of Hydrophobic Fibers for Enhanced Biological Properties

2021 ◽  
Author(s):  
Wevernilson F. de Deus ◽  
Bruna M. de França ◽  
Josué Sebastian B. Forero ◽  
Alessandro E. C. Granato ◽  
Henning Ulrich ◽  
...  
Keyword(s):  
Free Energy ◽  
Interfacial Free Energy ◽  
Biological Properties

Free Energy of the Σ = 11 (332) Tilt Grain Boundary in Silicon

1993 ◽  
Vol 126-128 ◽  
pp. 253-256 ◽  
Author(s):  
S. Mourelatos ◽  
N. Ralantoson ◽  
P. Delavignette ◽  
A. Hairie ◽  
F. Hairie ◽  
...  
Keyword(s):  
Free Energy ◽  
Grain Boundary ◽  
Tilt Grain Boundary

Modeling the Diffusion-Controlled Growth of Needle and Plate-Shaped Precipitates

2002 ◽  
Vol 731 ◽  
Author(s):  
Z. Guo ◽  
W. Sha
Keyword(s):  
Free Energy ◽  
Transformation Strain ◽  
Interfacial Free Energy ◽  
Growth Theory ◽  
Controlled Growth ◽  
Precipitate Morphology ◽  
Interface Kinetics ◽  
Diffusion Controlled ◽  
Precipitate Growth ◽  
Strain Stress

AbstractVarious theories have been developed to describe the diffusion-controlled growth of precipitates with shapes approximating needles or plates. The most comprehensive one is due to Ivantsov, Horvay and Cahn, and Trivedi (HIT theory), where all the factors that may influence the precipitate growth, i.e. diffusion, interface kinetics and capillarity, are accounted for within one equation. However, HIT theory was developed based on assumptions that transformation strain/stress and interfacial free energy are isotropic, which are not true in most of the real systems. An improved growth theory of precipitates of needle and plate shapes was developed in the present study. A new concept, the compression ratio, was introduced to account for influences from the anisotropy of transformation strain/stress and interfacial free energy on the precipitate morphology. Experimental evidence supports such compression effect. Precipitate growth kinetics were quantified using this concept. The improved HIT theory (IHIT theory) was then applied to study the growth of Widmanstatten austenite in ferrite in Fe-C-Mn steels. The calculated results agree well with the experimental observations.

Breakthrough of Sublimation Drying by Liquid Phase Deposition

2021 ◽  
Vol 314 ◽  
pp. 172-177
Author(s):  
Yuta Sasaki ◽  
Yousuke Hanawa ◽  
Masayuki Otsuji ◽  
Naozumi Fujiwara ◽  
Masahiko Kato ◽  
...  
Keyword(s):  
Free Energy ◽  
Liquid Phase ◽  
Film Thickness ◽  
Process Parameters ◽  
Interfacial Free Energy ◽  
The Other ◽  
Liquid Phase Deposition ◽  
Drying Method ◽  
Substrate Side ◽  
Drying Technology

Damage-free drying becomes increasingly difficult with the scaling of semiconductor devices. In this work, we studied a new sublimation drying technology for 3nm node and beyond. In order to investigate the collapse factor by conventional sublimation drying, we observed the pattern with cryo-SEM and revealed that the collapse occurred when the liquid film on the substrate solidified. Based on this result, we considered that it was important to deposit a solidified film uniformly from the substrate side to suppress collapse. Two key process parameters were evaluated to achieve the uniform formation of the solidified film. One is interfacial free energy and the other is film thickness of solution just before solidification. By optimizing two key parameters, it was successfully demonstrated to suppress pattern collapse of challenging devices. In this paper, we report on a new drying method: sublimation drying by LPD (Liquid-phase deposition).

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