Effect of SiCpcontent on cooling curve characteristics and solidification kinetics of Al-Si/SiCpcast composites

González‐Rivera, Carlos; Baez, J; Chávez, Raúl; Alvarez, Omar; Juárez-Islas, J. A.

doi:10.1080/13640461.2003.11819631

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…On the other hand, the presence of SiC particles in the unmodified matrix produces a decrease in ∆θ and t E (Figs. 4 and 5); this confirms the theoretical prediction that when SiC P is added to the melt there should be a decrease in latent heat released during solidification, since the amount of liquid by unit volume is diminished [4]. Microstructures.…”

Section: Resultssupporting

confidence: 83%

Thermal Analysis and Microstructure Comparison Between A356 Aluminum Alloy and A356/15%vol. SiCP Cast Composite Modified with Strontium

Garcı́a-Hinojosa

Surappa

Rodríguez

2007

MSF

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A study of the effect of strontium on some solidification parameters, such as eutectic nucleation temperature, eutectic growth temperature, eutectic undercooling temperature and eutectic undercooling time, has been carried out using thermal analysis for a composite reinforced with 15 vol. % SiCP and, for comparison, for an A356 aluminum alloy. The composite is prepared by the melt stirring technique with a SiC particle size of 38 μm. Thermal analysis results show that the presence of SiCP in the unmodified A356 aluminum alloy increases the eutectic growth temperature (TE) and the eutectic nucleation temperature (TNucl); on the contrary, SiCP decreases the eutectic undercooling temperature (θ) and the eutectic undercooling time (tE). These phenomena suggest that SiC particles give favorable conditions for the growth of eutectic silicon. On the other hand, the modification with strontium of the composite material, although showing basically the same effect on the eutectic parameters as the one described for the A356 aluminum alloy, brings about certain differences due to the presence of the SiC particles. Microstructural analysis shows that the eutectic structures in the composite are coarser than those of the matrix alloy and they do not have the classic fibrous eutectic shape obtained in the matrix alloy. For the matrix alloy, when the Sr concentration increases beyond the quantity required to obtain a well-modified structure, the eutectic structure suffers a gradual coarsening or a reversion from fine fibrous silicon to coarser silicon; subsequently, when the Sr concentration is higher than 0.068%, Al2Si2Sr particles are produced. In the composite material there is also a gradual coarsening of the eutectic structure, although the appearance of Al2Si2Sr particles is just seen when the Sr concentration reaches 0.106%.

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Section: Resultssupporting

confidence: 83%

Thermal Analysis and Microstructure Comparison Between A356 Aluminum Alloy and A356/15%vol. SiCP Cast Composite Modified with Strontium

Garcı́a-Hinojosa

Surappa

Rodríguez

2007

MSF

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“…It has been argued that the NTA method is not reliable to make quantitative predictions of the latent heat of solidification due to the arbitrary nature of the zero curve calculation [5,9]. However, it has potential as an approximate, qualitative method to study the solidification kinetics of several cases of metallurgical interest [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Newton Thermal Analysis of Gray and Nodular Eutectic Cast Iron

Chávez

Amaro

Flores

et al. 2006

MSF

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The purpose of this work is to analyze the capability of Newton Thermal Analysis (NTA) to detect differences of the solidification kinetics between eutectic gray and ductile irons obtained from the same base alloy. The NTA experimental output has been analyzed with a simple micromacro modeling approach. The outcome of this work suggests that NTA has a good potential as a qualitative tool to characterize the solidification kinetics of alloys.

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Solidification Characteristics of Ex situ Particulate-Reinforced Aluminum Matrix Composites

2023

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Effect of SiC_pcontent on cooling curve characteristics and solidification kinetics of Al-Si/SiC_pcast composites

Cited by 6 publications

References 8 publications

Thermal Analysis and Microstructure Comparison Between A356 Aluminum Alloy and A356/15%vol. SiC<sub>P</sub> Cast Composite Modified with Strontium

Thermal Analysis and Microstructure Comparison Between A356 Aluminum Alloy and A356/15%vol. SiC<sub>P</sub> Cast Composite Modified with Strontium

Newton Thermal Analysis of Gray and Nodular Eutectic Cast Iron

Solidification Characteristics of Ex situ Particulate-Reinforced Aluminum Matrix Composites

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