Method for preparing reactive hot-press in-situ autogenesis aluminium-base composite material
An aluminum-based composite material, an in-situ autogenous technology, which is applied in the field of preparation of reactive hot-pressing in-situ autogenous aluminum-based composite materials, can solve the problems of no filling, waste of powder, cold welding, etc., and achieves density and stretching. The effect of improving performance, improving uniformity and fineness, and increasing powder mixing speed
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specific Embodiment approach 1
[0007] Specific embodiment one: the preparation method of the reaction hot pressing in-situ authigenic aluminum-based composite material of the present embodiment, it is finished by the following steps: a, mix Al powder, B powder and TiO by ball milling method 2 powder; b, put the mixed powder into a graphite mold for cold pressing, then put the mixed powder together with the graphite mold into a vacuum hot-press furnace for hot pressing and sintering to obtain (TiB 2 +Al 2 o 3 ) / Al composite material; in step a, Al powder: 50-90%, B powder: 2-10%, TiO 2 Powder: 8-40% and added to the ball mill tank, 8-21ml of ethanol is added to every 100 grams of mixed powder, vacuumized, and then filled with 1-1.5 atmospheres of argon, mixed powder on the ball mill, ball The material mass ratio is 1-10:1, the rotating speed is 100-400r / min, the powder mixing time is 6-12h, and finally dried.
specific Embodiment approach 2
[0008] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in the a step of this embodiment, take Al powder: 70%, B powder: 6%, TiO 2 Powder: 24% and join in the ball mill jar, add the ethanol of 14ml in every 100 grams of mixed powders, vacuumize, then charge into the argon of 1.3 atmospheric pressure, mix powder on the ball mill, the mass ratio of ball to material is 5: 1. The speed is 250r / min, and the mixing time is 9h. The above technical parameters can be used to grind the powder into fine powder, mix the powder evenly, and prevent the "cold welding" of the powder and the oxidation of the powder during the ball milling process.
specific Embodiment approach 3
[0009] Specific embodiment three: the difference between this embodiment and specific embodiment one is: in step a of this embodiment, take Al powder: 89%, B powder: 2%, TiO 2 Powder: 9% and join in the ball mill jar, add the ethanol of 20ml in every 100 grams of mixed powders, vacuumize, then charge into the argon of 1.5 atmospheric pressure, mix powder on the ball mill, the mass ratio of ball to material is 9: 1. The speed is 390r / min, and the mixing time is 11.5h. The above technical parameters can be used to grind the powder into very fine powder, the uniformity of powder mixing is high, and it can prevent the powder from "cold welding" and powder oxidation during the ball milling process.
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