▎ 摘　　要

NOVELTY - Strongly combined copper-plated graphene reinforced high-strength tin-silver-copper-rare earth composite brazing material by pyrolysis synthesis, comprises copper-plated graphene and a tin-silver-copper-rare earth-based brazing material at mass percentage of 0.01-0.11%. USE - Used as strongly combined copper-plated graphene reinforced high-strength tin-silver-copper-rare earth composite brazing material by pyrolysis synthesis. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing strongly combined copper-plated graphene reinforced high-strength tin-silver-copper-rare earth composite brazing material by pyrolysis synthesis, comprising (a) preparing copper-plated graphene by pyrolysis to obtain a copper-plated graphene strengthening phase and (b) mixing the copper-plated graphene strengthening phase obtained in the step (a) with tin-silver-copper-rare earth lead-free brazing material, pressing, sintering and extruding to obtain copper-plated graphene-reinforced high-strength tin-silver-copper-rare earth composite brazing material, where the step (i) comprises (a1) pre-weighed graphene nanosheets are placed in a ball milling and high-energy ball milled and then removed put from ball milling, (a2) the ball milled graphene nanosheets were mechanically mixed with copper acetate hydrate powder to obtain a uniform color mixed powder and set the load ratio to 10 mol.%, the amount of copper atomic matter is 1/10 of the amount of carbon atomic matter, and (a3) the mixed mixed powder is placed in a tubular furnace with a protective gas, and is kept at 450-600 degrees C for 3-5 hours, and then cooled to room temperature with a furnace to obtain copper-plated graphene.