A kind of graphene-reinforced magnesium-based composite material and preparation method thereof
A composite material and graphene technology, applied in the field of graphene-reinforced magnesium-based composite materials and their preparation, can solve problems such as weak interface bonding and poor graphene dispersion, and achieve uniform organization, good performance, and good repeatability.
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Embodiment 1
[0027] In the graphene-reinforced magnesium-based composite material in this embodiment, the matrix used is pure magnesium (the impurity content is less than 0.5wt.%, the rest is Mg), and the particle size is 300 mesh; The diameter is 1-3μm, the thickness is 1-2nm, and the purity is ≥99.5wt.%. Concrete preparation process is carried out according to the following steps:
[0028] (1) Add 750mg of graphene nanosheets to 1500ml of absolute ethanol, ultrasonically in an ultrasonic cleaner for 90min, with an ultrasonic power of 400W, and mechanically stir it for 2min every 30min at a rate of 300r / min to obtain evenly dispersed graphene Nanosheet / Ethanol Dispersion.
[0029] (2) Add 150g of pure magnesium powder to the dispersion obtained in step (1), mechanically stir for 30min, and the speed is 400r / min to obtain a uniformly mixed graphene nanosheet / pure magnesium mixed slurry.
[0030] (3) the mixed slurry that step (2) obtains is placed in container and carries out underpressu...
Embodiment 2
[0035] In the graphene-reinforced magnesium-based composite material in this embodiment, the matrix used is ZK61 magnesium alloy (Zn: 5.81wt.%, Zr: 0.71wt.%, impurity content is less than 0.1wt.%, and the rest is Mg). The diameter is 250-325 mesh; the reinforced phase used is graphene nano-sheets, the diameter of which is 1-5 μm, the thickness is 1-5 nm, and the purity is ≥99.9wt.%. Concrete preparation process is carried out according to the following steps:
[0036] (1) Add 2000mg of graphene nanosheets into 2000ml of absolute ethanol, ultrasonically 120min in an ultrasonic cleaning machine, with an ultrasonic power of 200W, and mechanically stir it for 1min every 30min at a rate of 500r / min to obtain evenly dispersed graphene Nanosheet / Ethanol Dispersion.
[0037] (2) Add 200g ZK61 magnesium alloy powder to the dispersion liquid obtained in step (1), and mechanically stir for 60min at a rate of 500r / min to obtain a uniformly mixed graphene nanosheet / ZK61 mixed slurry.
[...
Embodiment 3
[0043] In the graphene-reinforced magnesium-based composite material in this embodiment, the matrix used is ZK60 magnesium alloy (Zn: 5.21wt.%, Zr: 0.34wt.%, impurity content is less than 0.2wt.%, and the rest is Mg). The diameter is 325-400 meshes; the reinforced phase used is graphene nanosheets, the diameter of which is 5-10 μm, the thickness is 3-5 nm, and the purity is more than or equal to 99.0 wt.%. Concrete preparation process is carried out according to the following steps:
[0044] (1) Add 4.5g of graphene nanosheets into 2500ml of absolute ethanol, ultrasonicate in an ultrasonic cleaning machine for 60min, with an ultrasonic power of 500W, and mechanically stir it for 5min every 30min at a rate of 400r / min to obtain evenly dispersed graphite ene nanosheet / ethanol dispersion.
[0045](2) Add 100g ZK60 magnesium alloy powder to the dispersion obtained in step (1), and mechanically stir for 90min at a rate of 300r / min to obtain a uniformly mixed graphene nanosheet / ZK6...
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