A Novel Approach for Extracting and Characterizing Interfacial Reaction Products in Al-SiC
                p
               Composites

Ravi, K.R.; Pillai, R. M.; Pai, B.C.; Chakraborty, M.

doi:10.1007/s11661-007-9254-y

Cited by 11 publications

(6 citation statements)

References 10 publications

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“…Detailed description about the extraction of reaction product from Al/SiC p composites by salt flux addition technique is reported elsewhere [15,16]. Three-dimensional morphologies of interfacial reaction products in the extracted powders are examined using a JSM-5600 LV/EDX instrument.…”

Section: Experimental Methodsmentioning

confidence: 99%

Role of matrix alloy chemistry on the interfacial reaction and solidification of metal matrix composites

Paia

Ravi

Pillai

2009

Trans Indian Inst Met

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Equilibrium Si content required to suppress the interfacial reaction in 2124 Al/SiC and A356 Al/SiC has been thermodynamically predicted by combining Wilson equation with the Miedema model. In 2124 Al/SiC composites, good agreement between thermodynamically calculated and experimental result has been observed in the solid and semi solid state reaction. At higher temperature above 750 o C, thermodynamically calculated results are much higher than that of experimental values. Strong influence of reinforcement size and volume fraction on the extent of interfacial reaction is also observed in 2124 Al/SiC composites. In these composites, formation of protective layer of Al 4 C 3 crystals over SiC surface plays significant role in predicting the equilibrium Si content. The influence of reinforcement particle size and volume fraction on the extent of reaction has not been observed in A356 Al/SiC composites and irrespective of reaction temperature the thermodynamically calculated equilibrium Si contents for A356 Al/SiC composites agrees well with the experimental results.

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Section: Experimental Methodsmentioning

confidence: 99%

Role of matrix alloy chemistry on the interfacial reaction and solidification of metal matrix composites

Paia

Ravi

Pillai

2009

Trans Indian Inst Met

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“…At a certain quantity of flux addition, i.e., approximately 0.5 to 1 wt pct, separation of reinforcement particles along with the reaction products starts leading to their floating on the melt surface and skimming off. [25,26] The powders extracted by this process are named as reclaimed powder. The leftover matrix melt in the crucible was poured into a cast iron mold and is named as reclaimed alloy.…”

Section: Methodsmentioning

confidence: 99%

“…[26]. Further, the experimentally calculated size (D Al 4 C 3 ) and shape (n Al 4 C 3 ) of Al 4 C 3 have been incorporated in Eq.…”

Section: Theoretical Prediction With Interfacial Reactionmentioning

confidence: 99%

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Influence of Interfacial Reaction on the Fluidity of A356 Al-SiC p Composites—A Theoretical Approach

Ravi

Pillai

Pai

et al. 2007

Metall Mater Trans A

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Fluidity behavior of the A356 Al alloy and A356 Al-SiC p composites has been theoretically predicted using the Flemings model after incorporating (1) the solidification behavior of the alloy; (2) the decrease in flow velocity due to surface tension and friction losses; and (3) the increase in viscosity of composite slurries due to size, shape, and volume fraction of the reinforcement. It is observed that the fluidity values of A356 Al alloy and A356 Al-10 vol pct SiC p composite predicted by the modified Flemings model are in good agreement with the experimental values reported in the literature. On the other hand, the theoretically calculated fluidity length of A356 Al-15 and 20 vol pct SiC p composites using the modified Flemings model agrees well with the experimental results only up to 750°C and 710°C, respectively. However, above these respective temperatures, the experimental spiral length decreases with pouring temperature, whereas the theoretically calculated spiral length increases linearly as a function of pouring temperature. Incorporation of experimentally calculated interfacial reaction terms in the modified Fleming model makes the predicted and experimental values of fluidity of A356 Al-15 and 20 vol pct SiC p composites closer in the entire temperature range. Thus, the high dependence of the fluidity of A356 Al-SiC p composites on the morphology of the interfacial reaction product is demonstrated.

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“…When the SiC ratio was 60%, it was determined that there were two phase transformations in succession. The first of these two-phase transformations was the eutectoid Si phase transformation and the other phase transformation was a phase transformation from solid to liquid (Ravi et al, 2007;B. Singh et al, 2013;V.…”

Section: Figure 2 Microstructure Of Al/sic Composites As a Function Of Sicmentioning

confidence: 99%

An Experimental Study of The Effects of Ceramic Composition on The Electrical and Thermal Properties of Al/SiC Composites

Aydin¹

2021

European Journal of Science and Technology

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Al/SiC metal-matrix composites were investigated through Differential Thermal Analysis device as a function of volume fraction of SiC particles and sample temperature ranging 273 K to 373 K. It was found that electrical resistivity increased with increasing sample temperature and volume fraction of SiC. In contrast to electrical resistivity, electrical conductivity decreased with increasing sample temperature and volume fraction of SiC. Electrical conductivity decreased from 1,8x10 7 1/ohm.m to 2x10 6 1/ohm.m as the volume fraction of SiC increased to 60%. On the other hand, thermal conductivity decreased with increasing volume fraction of SiC particles, while being almost insensitive to temperature change between 273 K to 373 K. Thermal conductivity decreased from 120 W/mK to 10 W/mK as the volume fraction of SiC increased to 60%.

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A Novel Approach for Extracting and Characterizing Interfacial Reaction Products in Al-SiC p Composites

Cited by 11 publications

References 10 publications

Role of matrix alloy chemistry on the interfacial reaction and solidification of metal matrix composites

Role of matrix alloy chemistry on the interfacial reaction and solidification of metal matrix composites

Influence of Interfacial Reaction on the Fluidity of A356 Al-SiC p Composites—A Theoretical Approach

An Experimental Study of The Effects of Ceramic Composition on The Electrical and Thermal Properties of Al/SiC Composites

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