Study on Ti2AlC/Mg Matrix Composites with Dual-scale Three-dimensional Network

Abstract

The properties and microstructure of composites are closely related to the evolution of interface bonding. In this study, the microstructure of Ti 2 AlC/Mg matrix composites with double-scale three-dimensional network was studied. The composites presented a three-dimensional network at macro and micro scales, and the matrix and reinforcements were connected with each other. The mechanical properties and damping properties of Ti 2 AlC/Mg matrix composites and magnesium alloy matrix with double-scale threedimensional network were tested. In addition, according to the basic properties of Ti2AlC/Mg ceramics and AZ91D magnesium alloy, the equivalent modulus of three-dimensional network Ti 2 AlC/Mg matrix composites at micro scale was predicted by finite element method. The conclusions were as follows: (1) The ultimate flexural strength of the composites was about 10% higher than that of the matrix magnesium alloy, and the ability to maintain strength was greatly improved compared with that of the matrix magnesium alloy. (2) Using the extracted information, the equivalent modulus of the composite microscopic model was calculated to be 31.26 GPa, which is consistent with the experimental results. It provides data and theoretical support for similar research.