Copper-graphene composite material and preparation method thereof
A composite material and graphene technology, which is applied in the field of copper-graphene composite materials and its preparation, can solve the problems affecting the chemical composition and microstructure of copper-graphene composite materials, unsatisfactory forming and processing performance, and comprehensive performance impact. Achieve the effects of controllable distribution density, improved binding strength, and improved binding capacity
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Embodiment 1
[0021] Copper powder and graphene with a particle size of 500 nanometers are used as raw materials, and the graphene content is 0.01 wt%. Argon is used as a protective gas for ball milling and powder mixing, and the ball milling time is 3 hours. After ball milling and powder mixing, put the mixed powder into the hot-press sintering mold in an argon-filled glove box, and put the hot-press sintering mold with the mixed powder into the hot-press sintering furnace. When the vacuum degree reaches ≤10 -2 After Pa, the temperature is raised to 850°C at a rate of 10±1°C / min, sintered at a constant temperature, and the holding time is 3 hours. The pressure applied to the mixed powder during the entire sintering process is 4 tons. After the hot pressing sintering is completed, the billet is taken out for hot isostatic pressing. The hot isostatic pressing uses argon as the pressure gas, and the heating rate is 10±1°C / min. The hot isostatic pressing process is as follows: pressure 160MPa,...
Embodiment 2
[0026] Copper powder and graphene with a particle size of 500 nanometers are used as raw materials, and the graphene content is 0.15 wt%, and argon is used as a protective gas for ball milling and powder mixing, and the ball milling time is 3 hours. After ball milling and powder mixing, put the mixed powder into the hot-press sintering mold in an argon-filled glove box, and put the hot-press sintering mold with the mixed powder into the hot-press sintering furnace. When the vacuum degree reaches ≤10 -2 After Pa, the temperature is raised to 850°C at a rate of 10±1°C / min, sintered at a constant temperature, and kept for 3 hours. The pressure applied to the mixed powder during the entire sintering process is 4 tons. After the hot pressing sintering is completed, the billet is taken out for hot isostatic pressing. The hot isostatic pressing uses argon as the pressure gas, and the heating rate is 10±1°C / min. The hot isostatic pressing process is: pressure 160MPa, temperature 850°C...
Embodiment 3
[0028] Copper powder and graphene with a particle size of 500 nanometers are used as raw materials, and the graphene content is 0.30wt%. Argon is used as a protective gas for ball milling and powder mixing, and the ball milling time is 3 hours. After ball milling and powder mixing, put the mixed powder into the hot-press sintering mold in an argon-filled glove box, and put the hot-press sintering mold with the mixed powder into the hot-press sintering furnace. When the vacuum degree reaches ≤10 -2 After Pa, start to heat up (heating rate is 10±1°C / min), when the temperature rises to the sintering temperature, start to keep warm and count. The hot pressing sintering process is as follows: the sintering temperature is 850°C, the sintering holding time is 3 hours, and the pressure applied to the mixed powder during the whole sintering process is 4 tons. After the hot pressing sintering is completed, the billet is taken out for hot isostatic pressing. The hot isostatic pressing us...
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