The reclamation process by salt flux addition has been employed to extract the interfacial reaction products as well as SiCpfrom Al-SiCp composites. It has been observed that this process enables the use of X-ray diffraction (XRD) to identify the interfacial reaction product Al4C3in Al-SiCp composites even in the early stages of reaction. Further, it allows an easy and more accurate quantification of the interfacial reaction in Al-SiCp composites using spectroscopic techniques such as optical emission spectroscopy (OES). © The Minerals, Metals & Materials Society and ASM International 2007.