Corrigendum to “The application of computational thermodynamics and a numerical model for the determination of surface tension and Gibbs–Thomson coefficient of aluminum based alloys” [Thermochim. Acta 523 (2011) 142–149]

Jácome, Paulo A.D.; Landim, Mariana C.; Garcia, Amauri; Furtado, Alexandre F.; Ferreira, Itamar

doi:10.1016/j.tca.2011.09.023

Cited by 3 publications

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“…A recent study on thermophysical properties in the hypoeutectic range of Al-based alloys has shown that the Gibbs-Thomson coefficient, generally assumed to be constant, can have a quite variable trend with the increase in the alloy solute content, particularly when the solute elements are Ni and Cu [33]. In other words, DT is one factor affecting the observed minimum values of 1 and 3 in the present study, but other specific Philosophical Magazine 4481…”

Section: Philosophical Magazine 4479mentioning

confidence: 47%

Growth of tertiary dendritic arms during the transient directional solidification of hypoeutectic Pb–Sb alloys

Freitas

Rosa

Garcia

et al. 2011

Philosophical Magazine

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Despite the importance of a complete characterization of dendritic patterns in castings, the availability of studies on the development of tertiary dendrite arms is scarce in the literature. In the present study, the tip cooling rate, local solidification time, primary and tertiary dendrite arm spacings have been determined in Pb-Sb alloys castings directionally solidified under unsteady-state heat flow conditions. The alloys compositions experimentally examined are widely used in the as-cast condition for the manufacture of positive and negative grids of lead-acid batteries. The initial growth of tertiary dendritic arms from the secondary branches was found to occur only for a Pb-3.5 wt% Sb alloy at cooling rates in the range 0.4-0.2 K/s, with no evidence of this spacing pattern for Pb-Sb alloys having lower solute content. Tertiary dendritic branches have been observed along the entire casting lengths for alloys of the Pb-Sb hypoeutectic range having compositions higher than 4.0 wt% Sb. It is shown that a power function experimental law with a characteristic À0.55 exponent is able to characterize the tertiary spacing evolution with the solidification cooling rate for alloys compositions !4.0 wt% Sb. The only exception was the Pb-3.5 wt% Sb alloy for which 3 exhibited significant lower values when compared with the experimental values obtained for the other Pb-Sb alloys for a same solidification cooling rate.

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Section: Philosophical Magazine 4479mentioning

confidence: 47%