Self-crack-healing materials have the capability of partial or complete healing cracks and the damage imposed on them as well as the capability of recovering the functionality and the integrity of the structure. 1,2 Self-crack-healing mechanisms inspired by the natural healing ability of biological systems can be categorized as either extrinsic or intrinsic. In the case of extrinsic healing, the system requires healing agents. On the other hand, intrinsic healing is inherent, the healing process is inherent in the material itself. Autonomic self-healing would make the materials ideal for aerospace and automotive applications. Among the many types of healing, only self-crack healing induced by oxidation can attain complete recovery. The crack-healed zone should be mechanically as strong as the original material to achieve