The ternary iron aluminum carbides

▶ Carbides present in ternary Fe-Al-C were investigated. ▶ Presence of carbides Fe3C, M23C6, and/or κ-Fe3AlC depends on the Al and C concentration. ▶ The existence of M23C6 ternary carbide in the Fe-Al-C system is recognized for first time. ▶ Solubility of Al in M23C6 is low and negligible in the cementite.