In addition, XPS results were used to examine the mechanism for the surface modification of Al and SiC particles during the NISFAC process and to understand why self-sintering only occurs in a nitrogen atmosphere. In this study, X-ray photoelectron spectroscopy (XPS) analysis was employed to investigate the compositional changes in monolithic SiC particles and the Al/SiC mixture during heating at 700 ☌ for 1 h in air, argon, and nitrogen atmospheres, respectively. This process employs an exothermic reaction accompanying the nitridation of Al, and the heat dissipated from the reaction enables the local melting and self-sintering of the Al powder. A nitrogen-induced self-forming Al composite (NISFAC) process was developed, which is a novel concept of a composite manufacturing process that does not require vacuum or external pressure. It is well known that poor wettability at the interface between the Al matrix and the reinforcing phase is a technical bottleneck in the development of aluminum matrix composites.
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