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Diffusion under temperature gradient: A phase-field model study
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10.1063/1.3190607
/content/aip/journal/jap/106/3/10.1063/1.3190607
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/3/10.1063/1.3190607
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Figures

Image of FIG. 1.
FIG. 1.

Composition profiles developed in an initially homogeneous single-phase alloy after being subjected to a temperature gradient for 6 h. Temperature ranged from on the left end and on the right end of the system.

Image of FIG. 2.
FIG. 2.

Representative profiles of composition and flux in an initially homogeneous single-phase alloy approaching steady state after being subjected to annealing in a temperature gradient. Temperature ranged from on the left end and on the right end of the system. “Mass flux” and “thermal flux” are the contributions of chemical potential gradient and temperature gradient, respectively, to the total flux. The “flux difference” is the difference between these two contributions (i.e., net flux).

Image of FIG. 3.
FIG. 3.

(a) A representative micrograph of the initial microstructure used for thermomigration studies. The bright and dark phases are the - and -rich phases, respectively. (b) Microstructure of a two-phase alloy annealed for 370 h in a temperature gradient, while the thermotransport effect was intentionally ignored during the simulation.

Image of FIG. 4.
FIG. 4.

Micrograph of the two-phase alloy obtained after an anneal for 370 h in a temperature gradient for case I where and . B atoms move toward the hot end forming a -rich single-phase, while an -rich phase forms at the cold end.

Image of FIG. 5.
FIG. 5.

Micrograph of the two-phase alloy obtained after an anneal for 370 h in a temperature gradient for case II where and . B atoms move toward the hot end forming a -rich single-phase, while an -rich phase forms at the cold end.

Image of FIG. 6.
FIG. 6.

Micrograph of the two-phase alloy obtained after an anneal for 370 h in a temperature gradient for case III where and . B atoms move toward the hot end forming a -rich single-phase, while an -rich phase forms at the cold end.

Image of FIG. 7.
FIG. 7.

Micrograph of the two-phase alloy obtained after being subjected to annealing for 370 h in a temperature gradient in case IV: , , and is small. The effect of thermomigration is less evident.

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/content/aip/journal/jap/106/3/10.1063/1.3190607
2009-08-11
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Diffusion under temperature gradient: A phase-field model study
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/3/10.1063/1.3190607
10.1063/1.3190607
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