Analysis of particle growth by coalescence during liquid phase sintering

Takajo, Shigeaki; Kaysser, W. A.; Petzow, G.

doi:10.1016/0001-6160(84)90207-4

Cited by 105 publications

(30 citation statements)

References 17 publications

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“…During the initial stage of the holding time, the coalescence is intense due to the relatively high solid fraction, which results in the rapid decrease of the peaks. It was reported that even a small contribution of the coalescence broadened the size distribution curve significantly [18]. With the increase of the holding time, as the particle coarsening decreased, especially the coalescence became less active, the decrease of the peaks became slow (Fig.…”

Section: Quantitative Analysismentioning

confidence: 91%

Effects of Mg and RE additions on the semi-solid microstructure of a zinc alloy ZA27

Chen

Yuan

Sun

et al. 2003

Science and Technology of Advanced Materials

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The effects of 2 mass% Mg and 0.8 mass% RE additions on the microstructural evolution of a Zr modified zinc alloy ZA27 during isothermal holding at semi-solid temperature of 460 8C have been studied by optical microscope and scanning electron microscope. Results show that these two elements all decrease the coarsening rate of solid primary particles, and improve the uniformity of particle size. The addition of Mg greatly decreases the solid fraction, and then increases the distance between particles. However, the element of RE mainly concentrates at the liquid regions between particles, and hinders both the atom diffusion and the welding of contact particles. In addition, the behaviors of particle coarsening of these two alloys, together with that of the Zr modified ZA27 alloy without the other elements, obey the LSW law after the three semi-solid systems reach at their solid-liquid equilibrium states. The additions of these two elements have no visible effect on the shape factor of particles. q

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Section: Quantitative Analysismentioning

confidence: 91%

Effects of Mg and RE additions on the semi-solid microstructure of a zinc alloy ZA27

Chen

Yuan

Sun

et al. 2003

Science and Technology of Advanced Materials

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“…high dihedral angles) could be shown particularly well in systems like Fe-Cu ( Fig. 12(a) and (b), [27,28]) and Ag-Cu (Fig. 12(c), [29]) .…”

Section: Ostwald Ripening and Shape Accommodationmentioning

confidence: 97%

Basic Mechanisms of Liquid Phase Sintering

Petzow

Kaysser

1990

Sintering Key Papers

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“…However, pure collisions could not describe the morphological changes. The theoretical observations by Takajo et al [17] showed that a combination of Ostwald ripening and coalescence with a size independent collision rate leads to the well-known Ostwald ripening law (cube root growth of the average particle size), but the rate of coarsening kinetics depends on the collision rate (which would here be proportional to the stirring frequency). This model described just the opposite of what was observed: the large the stirring frequency and thus collision rate, the smaller the overall growth rate [ Fig.…”

Section: Analysis Of Coalescence By Shear Flowmentioning

confidence: 99%

COARSENING KINETICS IN Al ALLOY CAST THROUGH RAPID SLURRY FORMATION (RSF) PROCESS

Sharma¹,

Pandel²,

Ratke³

2017

Acta Metall Slovaca

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In the present investigation, the rate of coarsening kinetics was discussed on conventional diffusional Lifshitz, Slyozov and Wagner (LSW) theory, coarsening by convective mass flow and coalescence by stirring speed. The rate of coarsening kinetics was found to be faster than predicted by diffusional LSW theory, but slower than predicted by the convective mass flow. The effect of flow pattern with baffles in a crucible at different holding time was also examined. The results showed that use of baffles produced fine and more globular primary α-Al phase when compared to sample processed without baffles having the same holding time.

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Analysis of particle growth by coalescence during liquid phase sintering

Cited by 105 publications

References 17 publications

Effects of Mg and RE additions on the semi-solid microstructure of a zinc alloy ZA27

Effects of Mg and RE additions on the semi-solid microstructure of a zinc alloy ZA27

Basic Mechanisms of Liquid Phase Sintering

COARSENING KINETICS IN Al ALLOY CAST THROUGH RAPID SLURRY FORMATION (RSF) PROCESS

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