Asynthesis route based on internal oxidation reactions in Cr-Pt alloys was utilized for the controlled production of near-surface, complex composite structures. The metal alloy microstructure was shown to act as a template for the nitrided composite microstructure. XRD analysis was performed on an as-cast nitrided coupon in which the surface Cr2N layer was removed. The diffraction pattern was indexed as a combination of Cr3PtN, an unusual metal nitride perovskite, and Cr2N, with trace amounts of Cr2O3 as a minor phase (likely present as impurity inclusions left over from the arc-casting step). Preliminary results have been reported in the Journal of Materials Research.