• 专利标题:   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.
  • 专利号:   CN108817727-A
  • 发明人:   ZHENG K, ZHANG M, YIN C, MA N, PAN Y, ZHANG C, WANG H, HUO F, ZHAO D
  • 专利权人:   UNIV HENAN SCI TECHNOLOGY
  • 国际专利分类:   B23K035/26, B23K035/40
  • 专利详细信息:   CN108817727-A 16 Nov 2018 B23K-035/26 201883 Pages: 11 Chinese
  • 申请详细信息:   CN108817727-A CN10795284 19 Jul 2018
  • 优先权号:   CN10795284

▎ 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.