The interfacial reaction characteristics in SiC/Al composite above liquidus during remelting

The development of interfacial reaction between matrix and reinforcement during the remelt recycling is critical to the commercialization and sustainable-development of metal matrix composite, but it is very difficult to characterize the interfacial reaction between the reinforcement and matrix melt above the liquids using a conventional experimental method. In this paper, the interfacial reaction characteristics in SiCp/Al composite above liquids were investigated using liquid metal X-ray diffraction and differential scanning calorimeter (DSC). A solute-rich region with much more Si content above liquids was observed in the composite melt, and the experimental results also showed that the interfacial reaction feature is associated with the solute-rich region with much more Si content. Mechanism for the observed phenomena was discussed in detail.