Measurement of Solid-Liquid Interfacial Energy for Solid Zn in Equilibrium with the ZnMg Eutectic Liquid

“…The triple point is strongly pulled toward the bccΣ3(111) boundary and therefore the solid-liquid interface has curvature, whereas the triple point is not strongly pulled and the solid-liquid interface is almost straight in the case of the bccΣ3(112) boundary. It is generally known that the equilibrium structure of a grain boundary groove is determined by the balance between the grain boundary energy and the solid-liquid interfacial energy 7) as illustrated in Fig. 3(b).…”

Section: Evolution Of Grain Boundary Groovementioning

confidence: 99%

“…Moreover, the equilibrium shape of the grain boundary groove in rapidly quenched samples obtained by annealing in a temperature gradient is often used to estimate the solid-liquid interfacial energy. [4][5][6][7] That is, the balance between the solid-liquid interfacial energy and grain boundary energy at a triple point determines the equilibrium shape of the grain boundary groove. In addition, the solid-liquid interfacial energies for alloys have recently been estimated from the relation between the tip radius and growth velocity of dendrites obtained from the in-situ observation of solidification using synchrotron radiation X-rays.…”

Section: Introductionmentioning

confidence: 99%

Large-scale Molecular Dynamics Study on Evolution of Grain Boundary Groove of Iron

2012

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The kinetics of a solid-liquid interface of iron with a triple point is investigated by performing a largescale molecular dynamics (MD) simulation. A grain boundary groove evolves at the triple point of a solidliquid interface with a bccΣ3(111) tilt grain boundary during solidification, whereas a solid-liquid interface with a twin boundary of small grain boundary energy is almost planar except in the vicinity of the triple point. The propagation velocity of the solid-liquid interface without a triple point is almost proportional to the degree of undercooling. On the other hand, that of the interface with the triple point deviates from linearity as the degree of undercooling decreases due to the balance between the driving force of the solidliquid interface induced by undercooling and the pulling force excited by the grain boundary. Moreover, it is found that the equilibrium temperature at which the solid-liquid interface does not move is in close agreement with the curvature undercooling estimated by the Gibbs-Thomson effect. These insights are newly obtained by the large-scale MD simulation performed on a graphic processing unit (GPU), which achieves about 100 times the speed of our previous simulation performed on a single central processing unit (CPU).

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“…The detail of the experimental procedure was given in Refs. [15][16][17][18][19][20][21][22][23][24][25].…”

Section: Thermal Conductivities Of the Solid And Liquid Phasesmentioning

confidence: 99%

“…Al-Zn Zn solid solution (Zn-2.4 at.%Al) [21] Zn-11.3 at.%Al [21] 653 1.61 [21] (5.80 ± 0.18) × 10 −8 [21] 93.50 ± 8.41 [21] 182.30 ± 18.23 [21] Zn-Mg (Zn-0.4 at.%Mg) [22] Zn-7.8 at.%Mg [22] 639.28 0.84 [22] (10.64 ± 0.43) × 10 −8 [22] 89.16 ± 8.02 [22] 172.97 ± 20.76 [22] Zn SL and gb for zinc based binary alloys determined in previous works is given in Table 5. As can be seen from Table 5, the resulting values of , SL and gb are in an good agreement with the values of , SL and gb obtained in previous works in the limits of experimental errors.…”

Section: Systemmentioning

confidence: 99%