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      Investigation into the kinetic behavior of molten aluminum pressureless infiltration into SiC preforms

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          Abstract

          Infiltration of molten metal into ceramic performs without using external force is a new fabrication method for metal-matrix composites. In this research, the kinetics of pressureless infiltration in the processing of Al/SiC composites have been investigated. In order to improve the wettability and infiltration properties, Al-6Mg (wt.%) alloy was prepared. Also, the ceramic component was coated for 15 min using electroless copper plating at a temperature of 60 – 70 °C ( pH = 12.5) and a rate of 17 – 20 μm s −1. Infiltration of molten aluminum into the coated ceramic perform was successfully carried out in the temperature range of 850 to 950 °C under nitrogen atmosphere. Microstructural investigations indicated a well-bonded metal–ceramic joint. Kinetic studies showed that the melt infiltration into the ceramic foam follows an S-shaped curve. The infiltration rate was specified with respect to variables such as the experiment temperature and the size of the pores of the ceramic component. The results revealed that by increasing the temperature and the size of pores, the infiltration rate increases. For infiltrating molten metal into the 10 and 30 ppi foams, activation energies of 5.902 kJ mol −1 and 7.232 kJ mol −1 are required, respectively.

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          Most cited references 31

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          The production and application of metal matrix composite materials

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            The fabrication of metal matrix composites by a pressureless infiltration technique

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              Microstructural variations in cast B4C-reinforced aluminium matrix composites (AMCs)

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                Author and article information

                Journal
                ijmr
                International Journal of Materials Research
                Carl Hanser Verlag
                1862-5282
                2195-8556
                14 October 2016
                : 107
                : 10
                : 954-959
                Affiliations
                a Department of Materials Science, Faculty of Engineering, University of Shahrekord, Shahrekord, Iran
                b Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
                Author notes
                [* ] Correspondence address, Hassan Sharifi, Department of Materials Science, Faculty of Engineering, University of Shahrekord, Shahrekord, Iran, Tel.: +989131094053, Fax: +983832324401, E-mail: sharifi@ 123456eng.sku.ac.ir
                Article
                MK111422
                10.3139/146.111422
                © 2016, Carl Hanser Verlag, München
                Page count
                References: 34, Pages: 6
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