Preparation method of graphene surface cobalt plating reinforced cobalt-based alloy composite powder for selective laser melting forming
A technology of selective laser melting and graphene surface, applied in the direction of additive processing, etc., can solve the problems of poor wettability between graphene and substrate, large specific surface area, and loose bonding, achieving good sphericity, excellent performance, and avoiding oxidation. Effect
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[0030] This embodiment provides hydrothermal synthesis of cobalt-plated graphene process:
[0031] (1) Weigh 0.1 g of graphene dissolve in 40 ml of ethylene glycol ((CH) 2 OH) 2 In solution, ultrasonic dispersion; then, 0.5 g of hexahydrate chloride (COCL) 2 · 6h 2 O) Add the above mixed solution, stir well, add 10 drops of ammonia (NH 3 · H 2 O) Adjust the pH of the solution to 9-10 to obtain a graphene solution;
[0032] (2) Take 1 mL of hydration (N 2 Hide 4 · H 2 O), add 9 ml of deionized water, obtain a hydration of a hydration of a volume fraction of 10%;
[0033] (3) Heat the graphene solution, when the temperature rises to 85 ° C, slowly add the diluted reducing agent water in a diluted reducing agent water in 2 to 3 drops per second. 2 Hide 4 · H 2 O Solution (the volume fraction of 10% hydration solution);
[0034] The reducing property of hydration is reduced in graphene surface and the interlayer reduction of cobalt metal particles, and the reaction equation involved i...
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