US 11,655,521 B2
Graphene modifying method of metal
Wei-Lin Tseng, Taipei (TW); Yang-Ming Shih, Taipei (TW); and Chi-Hang Hung, Taipei (TW)
Assigned to Amazing Cool Technology Corp, Taipei (TW)
Filed by Amazing Cool Technology Corp, Taipei (TW)
Filed on Mar. 27, 2020, as Appl. No. 16/832,382.
Prior Publication US 2021/0299746 A1, Sep. 30, 2021
Int. Cl. B22F 3/10 (2006.01); B22F 1/142 (2022.01); B22F 1/103 (2022.01); B22F 1/145 (2022.01); C22C 1/05 (2023.01)
CPC C22C 1/05 (2013.01) [B22F 1/103 (2022.01); B22F 1/142 (2022.01); B22F 3/1007 (2013.01); B22F 3/1021 (2013.01); B22F 3/1035 (2013.01); B22F 1/145 (2022.01); B22F 1/147 (2022.01); B22F 2301/10 (2013.01); B22F 2302/40 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A graphene modifying method of metal, including steps of:
a) providing a metal powder, a graphene powder, and a binder, wherein
the metal powder comprising a plurality of metal particles, wherein each of the plurality of metal particles is a dendritic electrolytic copper particle and a weight percentage of the graphene powder in the powder material is less than 5%,
the binder comprising a wax material, a coupling agent with 0.5%˜2% in weight, and a dispersing agent with 5%˜20% in weight, wherein the coupling agent is selected from one of titanate or chromium complex, and the dispersing agent is selected from a group consisting of methylpentanol, polyacrylamide, and fatty acid polyethylene glycol ester,
the graphene powder comprising a plurality of graphene micro pieces, each of the plurality of graphene micro pieces is formed by 6-atom unit cells connected with each other, each of the 6-atom unit cells comprising six carbon atoms connected in a hexagonal structure, one of the six carbon atoms of each of the 6-atom unit cells is connected with a stearic acid functional group via a sp3 bond;
b) mixing the metal powder, the graphene powder, and the binder to form a powder material, wherein a heat is generated by a friction, the sp3 bond connected with the stearic acid functional group is thereby heated and broken, after the stearic acid functional group is separate from each of the 6-atom unit cells, each of the 6-atom unit cells is connected with other 6-atom unit cells via the sp3 bond, and the plurality of metal particles is thereby wrapped by 6-atom unit cells; and
f) sintering the powder material formed in step (b) into a metal body with a vacuum thermo press sintering operation, wherein the plurality of metal particles is sintered into the metal body and the plurality of graphene micro pieces is transformed into a three-dimensional mash embedded in the metal body.