Cubic boron nitride superhard composite material combined with high-entropy alloy and preparation method thereof
A cubic boron nitride and high-entropy alloy technology, applied in the field of new materials, can solve the problems of poor high-temperature stability of the binder, complex preparation process, limited hardness and strength of composite materials, etc., achieve high hardness and strength, and improve performance Effect
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[0020] The preparation method of the present invention is as follows:
[0021] (1) Preparation of high-entropy alloy binder powder
[0022] The mass percentages of the high-entropy alloy binder powder raw material components are: aluminum powder 10-25wt.%, nickel powder 25-30wt.%, copper powder 20-30wt.%, chromium powder 15-25wt.%, iron powder balance, The sum of each component is 100wt.%. The above powders are all metal elemental powders with a purity of 99.5%, and the mesh number is 325-500 mesh. A mechanical alloying method is adopted to prepare high-entropy alloy binder powder, and aluminum powder, nickel powder, copper powder, chromium powder, and iron powder are ball-milled in a planetary ball mill for 30-60 hours.
[0023] (2) Adding 10-30 wt.% cubic boron nitride fine powder to the high-entropy alloy binder powder, the particle diameter of the cubic boron nitride fine powder is 20-70 μm. Fill high-entropy alloy binder and cubic boron nitride mixed micropowder into g...
Embodiment 1
[0028] According to mass percentage, put 20wt.% aluminum powder, 30wt.% nickel powder, 20wt.% copper powder, 20wt.% chromium powder, 10wt.% iron powder into the WC hard alloy tank, all metal The purity of the powder is 99.5%, the mesh number is 400 mesh, the ball-to-material ratio is 10:1, and the ball milling medium is WC carbide balls. After repeated gas washing (argon gas) in the glove box transition chamber, it is put into the operation chamber. Cover the sealing cover, ensure that the tank is taken out under the argon atmosphere and put it into the planetary ball mill of the model QM-3SP4. The ball milling speed is 350r / min, and the forward and reverse runs alternately. Reciprocating, when the ball milling time is 10h, 20h, 30h, drip the control agent, the control agent is industrial ethanol (analytical purity ≥ 99.7%), and the dripping amount is 0.2ml / 10g powder, after ball milling for 40h, the powder Take it all out.
[0029] Add 20wt.% cubic boron nitride micropowder ...
Embodiment 2
[0034] According to mass percentage, put 10wt.% aluminum powder, 25wt.% nickel powder, 20wt.% copper powder, 15wt.% chromium powder, 30wt.% iron powder into the WC hard alloy tank, all metal The purity of the powder is 99.5%, the mesh number is 325 mesh, the ball-to-material ratio is 10:1, and the ball milling medium is WC carbide balls. After repeated gas washing (argon gas) in the transition chamber of the glove box, it is put into the operation chamber. Cover the sealing cover, ensure that the tank is taken out under the argon atmosphere and put it into the planetary ball mill of the model QM-3SP4. The ball milling speed is 350r / min, and the forward and reverse runs alternately. Reciprocating, when the ball milling time is 10h, 20h, 30h, 40h, 50h, drop the control agent, the control agent is industrial ethanol (analytical purity ≥ 99.7%), the drop amount is 0.2ml / 10g powder, ball mill for 60h Then remove all the powder.
[0035] Add 10wt.% cubic boron nitride micropowder t...
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