▎ 摘　　要

NOVELTY - The multi-scale composite material that is a sintered titanium alloy powder coated with graphene, and is comprised of a continuous network distribution structure. The titanium alloy powder is comprised of a particle size of two scales, large and small. The mass proportion of the large particle size titanium alloy powder is greater than or equal to the mass proportion of the small particle size titanium alloy powder. The thickness of the graphene layer wrapped by the titanium alloy powder with different particle sizes is the same. A mismatch between the particle size of the titanium alloy and the thickness of the graphene layer is formed. The mismatch is configuerd to satisfy the formula with r as is the thickness of the graphene layer wrapped on the surface of the titanium alloy powder, R as is the median diameter of the titanium alloy powder, VGr as is the volume of graphene added, and VTi as is the volume of the titanium alloy powder. USE - Multi-scale composite material based on mismatch between particle size of titanium alloy and thickness of graphene layer. ADVANTAGE - The multi-scale composite material is organized and distributed in controllable shape, so as to improve the performance of the composite material, improve the tissue morphology of the material, reduce the gap of the internal tissue, and reduce the generation of crack. The graphene agglomeration caused by the combination degree of the graphene and titanium alloy is poor, so that the toughness of composite material is improved. The bulk density of the powder is improved, thus improving the relative density of material, and reducing the defect of material which is good for the load to the reinforced particle transfer from the substrate, and hence synergistically improving the mechanical property of material. The titanium alloy powder with different particle diameter is configured to cover the graphene layer with the same thickness, and the presence of small particle diameter powder improves the whole specific surface area, and thickness of graphene layer DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a multi-scale composite material based on the mismatch between the particle size of the titanium alloy and the thickness of the graphene layer.