Fourier thermal analysis of the solidification kinetics in A356/SiCp cast composites

Baez, J; González, César; Chávez, Martínez; Castro, Mickaël; Juárez, José Antonio Caballero

doi:10.1016/j.jmatprotec.2004.04.119

Cited by 13 publications

(4 citation statements)

References 9 publications

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“…The nucleation of the eutectic microconstituent in composites was increasing as the SiC p content increased. Baez et al 4 identified that the presence of the SiC p in Al-Si matrix caused a decrease in the local solidification time and physicochemical interaction between SiC p and Al-Si matrix. Owing to that reaction, the nucleation of microconstituents formed at the particles/matrix interface.…”

Section: Resultsmentioning

confidence: 99%

Investigation of thermal properties of Al–Si matrix reinforced fine SiC_p composites

Abdullah

Daud

Harun

et al. 2010

Materials Science and Technology

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The characterisation of thermal expansion coefficient and thermal conductivity of Al–Si matrix alloy and Al–Si alloy reinforced with fine SiCp (5 and 20 wt-%) composites fabricated by stir casting process are investigated. The results show that with increasing temperature up to 350°C, thermal expansion of composites increases and slowly reduces when the temperature reaches to 500°C. The values of both thermal expansion and conductivity of composites are less than those for Al–Si matrix. Microstructure and particles/matrix interface properties play an important role in the thermal properties of composites. Thermal properties of composites are strongly dependent on the weight percentage of SiCp.

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Section: Resultsmentioning

confidence: 99%

Investigation of thermal properties of Al–Si matrix reinforced fine SiC_p composites

Abdullah

Daud

Harun

et al. 2010

Materials Science and Technology

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“…Eq. (1) shows that the system formed by the metallic sample and the mold change their enthalpies as a result of a heat flow transferred to their surroundings through the exchange area A during its cooling at a given cooling rate. The global heat transfer coefficient h takes into account all the thermal resistances present in the heat transfer process from the sample to its surroundings including eventually air gap between sample and mold, refractory paint inner and external layers, thermal resistance of the metallic mold wall and combined radiation and convection heat transfer from the outer wall of the mold to the surroundings.…”

Section: Description Of the Methodsmentioning

confidence: 99%

Cooling Curve Analysis Method using a Simplified Energy Balance

González‐Rivera

Villeda

Argáez

2018

KEG

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In this work is described a new cooling curve analysis method focused on the experimental determination of the latent heat of phase changes and phase transformation kinetics.The method analyses the cooling process of a metallic sample, initially liquid that is contained into a cylindrical metallic mold, both of known weight, thermally isolated at its top and bottom. The method is based on a simplified energy balance associated with the experimental measurement of the temperature change of the sample during its cooling process. The method was applied experimentally to zinc and tin of commercial purity, initially liquids and contained into stainless steel molds in order to determine its ability to determine the latent heat of solidification. In order to validate the method, the obtained values of latent heat were compared with the values reported in thermochemical databases. The obtained results suggest that this method can be used to characterize the solidification of metals.

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“…The distance between consecutive bands is ~1.9 ± 0.1 mm, which is comparable with the vibration amplitude value (1.8 mm) used for vibrations' intensity higher than 20g. This segregation phenomenon can be explained considering the density difference between the SiC particles (ρ = 3200 kg/m 3 [30]) and the molten matrix (ρ = 2400 kg/m 3 [30]), and therefore different force intensity acting on the solid ceramic particles than on the molten metal. The different density values produce a different response to inertial forces, in terms of spatial movements, of the ceramic particles within the molten metal.…”

Section: Advances In Metal Matrix Compositesmentioning

confidence: 99%

Effect of Mechanical Mould Vibration on Solidification Behaviour and Microstructure of A360-SiC<sub>p</sub> Metal-Matrix Composites

Timelli

Corte

Bonollo

2011

MSF

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In this work the microstructural evolution of an A360 alloy reinforced with 10vol.% SiC particulate is described. During the material solidification, mechanical vibration, in the range of 0-41 times the gravity acceleration, g, has been applied to a steel die. It has been observed that vibrations can promote a quite homogeneous SiC dispersion on macroscopic scale. On the other hand, by using too high vibrations’ intensity, segregation phenomena have been pointed out in the castings. Furthermore, it has been evidenced that the reinforcement distribution is influenced by mechanical entrapment of the particles at grain boundaries and in the interdendritic channel. The metallographic analysis has emphasized a finer microstructure with increasing vibrations’ intensity. By comparing simulated and experimental temperature curves of the mould in the different cases, different HTC made the best fit. By increasing the vibrations’ intensity, the HTC increases in the temperature range of solidification of the composite.

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Fourier thermal analysis of the solidification kinetics in A356/SiCp cast composites

Cited by 13 publications

References 9 publications

Investigation of thermal properties of Al–Si matrix reinforced fine SiC_p composites

Investigation of thermal properties of Al–Si matrix reinforced fine SiC_p composites

Cooling Curve Analysis Method using a Simplified Energy Balance

Effect of Mechanical Mould Vibration on Solidification Behaviour and Microstructure of A360-SiC<sub>p</sub> Metal-Matrix Composites

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Fourier thermal analysis of the solidification kinetics in A356/SiCp cast composites

Cited by 13 publications

References 9 publications

Investigation of thermal properties of Al–Si matrix reinforced fine SiCp composites

Investigation of thermal properties of Al–Si matrix reinforced fine SiCp composites

Cooling Curve Analysis Method using a Simplified Energy Balance

Effect of Mechanical Mould Vibration on Solidification Behaviour and Microstructure of A360-SiC<sub>p</sub> Metal-Matrix Composites

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Product

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Investigation of thermal properties of Al–Si matrix reinforced fine SiC_p composites

Investigation of thermal properties of Al–Si matrix reinforced fine SiC_p composites