Advancing heat-tolerant composites with coherent ladder interfaces via constructing extremely fine nanolamellar solute-twining architectures

Abstract

The interface of ceramic particles and metal matrixes extremely impacts the mechanical properties of particle-reinforced metal matrix composites, especially at elevated temperatures. We provide a strategy for constructing extremely fine, in situ-formed coherent nanolamellar solute-twining architectures in a supersaturated MAX/Ni composite to modify the interface, aiming for higher strengths. Through this unique architecture, a coherent interface of ceramic particles and a metal matrix is formed, with an enormous coherent interface known as a ladder interface. The tensile strength at 1023 K is approximately 1 GPa by forming a thermally stable Schwarz crystal structure (< 3 nm). Developing heat-tolerant composites using this architecture may enhance the materials’ available properties for high-temperature applications.