The Synthesis and Processing Self-Healing Structural Al/Mg Lamellar Composite Materials

Self-healing alloy composites have been designed to address the need for self-repairable high-strength materials. However, delamination and cracking is a major limitation, stitching, and healing is established via the synergetic effect of low melting phase, Zn, and alloying element segregation. Under the controlled parameters, polycrystalline double layers are grown experimentally at the interfacial contacts between Al-Mg foils. The growth behavior of the interphase layers characterizing interface motion and long-range diffusion is established. The kinetic of controlled interphase with stitching/bridging and healing mechanism is introduced with microstructural and mechanical characterization. Chemical and mechanical bonding via inter diffusion processing with alloy segregatio are dominant for inte rphase kinetics. SEM, EDX and tensile testing with interfacial shear strength are introduced. The interphase kinetic established through localized micro plasticity, metal flow, alloy segregation and delocalized Al oxide and Mg oxide. The kinetic of interface/interphase introduce new nontraditional self-healing composite with new bridging and shielding mechanisms.