Modified aluminum powder as well as preparation method and application thereof
A technology for modification of aluminum powder, applied in the field of modified aluminum powder and its preparation, which can solve the problems of low coating rate of aluminum powder, poor interface bonding force between coating and aluminum powder, etc.
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Embodiment 1
[0033] (1) Melting aluminum ingots at 750°C to obtain molten aluminum;
[0034] (2) 15 parts by mass of polyvinylpyrrolidone, 60 parts by mass of trifluoroethyl methacrylate and 35 parts by mass of ethanol are uniformly mixed to obtain a mixed solution;
[0035] (3) Heat the molten aluminum to 850°C, spray it with a nitrogen flow of 15MPa to obtain a directional atomized aluminum powder beam; at the same time, use a nitrogen flow of 8MPa to spray the mixed liquid to obtain a directional mixed liquid jet; set the atomization The injection angle between the aluminum powder beam and the mixed liquid jet is 40°, so that the atomized aluminum powder beam and the mixed liquid jet are in contact at the impact area, and the temperature of the impact area is controlled at 650°C to obtain a composite aluminum powder with a microporous structure on the surface;
[0036] (4) the polytetrafluoroethylene that will be made up of the polytetrafluoroethylene of 15% mass content, the copper oxi...
Embodiment 2
[0038] (1) Melting aluminum ingots at 780°C to obtain molten aluminum;
[0039] (2) 15 parts by mass of polyvinylpyrrolidone, 40 parts by mass of hexafluorobutyl acrylate and 45 parts by mass of ethanol are uniformly mixed to obtain a mixed solution;
[0040] (3) Heat the molten aluminum to 800°C, spray it with a nitrogen flow of 10MPa to obtain a directional atomized aluminum powder beam; at the same time, use a nitrogen flow of 5MPa to spray the mixed liquid to obtain a directional mixed liquid jet; set the atomization The injection angle between the aluminum powder beam and the mixed liquid jet is 20°, so that the atomized aluminum powder beam and the mixed liquid jet are in contact at the impact area, and the temperature of the impact area is controlled at 480°C to obtain a composite aluminum powder with a microporous structure on the surface;
[0041] (4) the polytetrafluoroethylene that will be made up of the polytetrafluoroethylene of 15% mass content, the copper oxide ...
Embodiment 3
[0043] (1) Melting aluminum ingots at 760°C to obtain molten aluminum;
[0044] (2) 15 parts by mass of polyvinylpyrrolidone, 60 parts by mass of pentafluoropropyl acrylate and 45 parts by mass of ethanol are uniformly mixed to obtain a mixed solution;
[0045] (3) Heat the molten aluminum liquid to 820°C, spray it with a nitrogen flow of 12MPa to obtain a directional atomized aluminum powder beam; at the same time, use a nitrogen flow of 8MPa to spray the mixed liquid to obtain a directional mixed liquid jet; set the atomization The injection angle between the aluminum powder beam and the mixed liquid jet is 30°, so that the atomized aluminum powder beam and the mixed liquid jet are in contact at the impact area, and the temperature of the impact area is controlled at 600°C to obtain a composite aluminum powder with a microporous structure on the surface;
[0046] (4) the polytetrafluoroethylene that will be made up of the polytetrafluoroethylene of 10% mass content, the copp...
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