In-situ synthesis CrB2-reinforced copper-based composite material and preparation method and application thereof
A copper-based composite material, in-situ synthesis technology, applied in the field of metal-based composite materials, can solve the problems of low hardness and wear resistance of copper-based composite materials, limit the application of copper-based composite materials, etc., to improve the hardness and wear resistance. Effect
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[0028] The invention provides an in-situ synthesis of CrB 2 A method for preparing a reinforced copper-based composite material, comprising the steps of:
[0029] (1) Chromium powder and boron powder are ball milled to obtain CrB 2 Precursor;
[0030] (2) CrB that described step (1) obtains 2 Precursor and pure copper powder are subjected to wet ball milling to obtain a mixture;
[0031] (3) The mixture obtained in the step (2) is sequentially dried, cold-pressed, sintered and calcined to obtain in-situ synthesized CrB 2 Reinforced copper matrix composites.
[0032] In the present invention, chromium powder and boron powder are ball milled to obtain CrB 2 Precursor. In the present invention, the particle diameter of the chromium powder is preferably 100-200 mesh, more preferably 120-170 mesh, more preferably 140-170 mesh; the particle diameter of the boron powder is preferably 200-400 mesh, further Preferably it is 230-325 mesh, More preferably, it is 270-325 mesh. In ...
Embodiment 1
[0059] Weigh a total of 10g of chromium powder and boron powder, wherein the molar ratio of chromium powder and boron powder is 1:2, the particle size of chromium powder and boron powder are both 200 mesh, purity ≥ 99.99, ball mill chromium powder and boron powder for 12h , the speed of the ball mill is controlled to 350 rpm, the ball-to-material ratio is 10:1, the material of the ball and the ball tank is alumina, and the diameter of the ball is 5mm. The ball milling process is completed under the protective environment of argon with a purity greater than 99.9%, and CrB is obtained 2 Precursor.
[0060] 0.5gCrB 2 The precursor and 49.5g of pure copper powder with a particle size of 200 mesh were ball milled for 10 hours in a ball milling speed of 120 rpm, a ball-to-material ratio of 2:1, and an anhydrous ethanol medium to obtain a mixture, and the materials of the balls and the ball tank were both Aluminum oxide, the diameter of the grinding ball is 5mm.
[0061] The ball-...
Embodiment 2
[0067] Take by weighing chromium powder and boron powder of total amount 10g, wherein chromium powder and boron powder molar ratio are 1:2, chromium powder and boron powder particle size are 200 orders, purity >=99.99, with chromium powder and boron powder ball mill 18h, control The speed of the ball mill is 400 rpm, the ball-to-material ratio is 20:1, the material of the balls and the spherical tank is alumina, and the diameter of the balls is 5mm. The ball milling process is completed under the protective environment of argon with a purity greater than 99.9%, and CrB is obtained 2 Precursor.
[0068] 1gCrB 2 The precursor and 49g of pure copper powder with a particle size of 200 mesh were milled for 8 hours in a ball milling speed of 150 rpm, a ball-to-material ratio of 4:1, and an anhydrous ethanol medium to obtain a mixture, and the material of the balls and the spherical tank was alumina. The diameter of the grinding ball is 5mm.
[0069] The ball-milled mixture was dr...
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