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Preparation method of magnesium nitride-carbon nanotube particle reinforced magnesium-based alloy material

wallpapers News 2021-11-17
Preparation method of magnesium nitride-carbon nanotube particle reinforced magnesium-based alloy material
The invention relates to a preparation method in the technical field of non-ferrous metal alloys, in particular to a preparation method of magnesium nitride-carbon nanotube particle reinforced magnesium-based alloy material. The carbon nanotube powder and magnesium nitride powder are mixed evenly according to the mass ratio of 1:1. The prepared magnesium nitride-carbon nanotube mixture particles are ball milled for 24 hours to obtain ultra-fine magnesium nitride-carbon nanotube mixture powder. Argon gas blows ultra-fine carbon nanotube-magnesium nitride powder into the magnesium-based alloy melt to form a reinforced magnesium-based alloy melt, which is then mechanically mixed and stirred, modified, refined, and poured to obtain magnesium nitride-carbon Nanotube particles reinforce magnesium-based alloy materials. The magnesium nitride-carbon nanotube particle reaction enhances the wear resistance, strength and performance of the magnesium-based alloy material, and at the same time, the stability of the structure is good, and the electrical and thermal conductivity are effectively improved.
The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a magnesium nitride-carbon nanotube particle reinforced magnesium-based alloy that has stable processing technology, low production cost, no pollution emission, and can be organized and produced under conventional smelting conditions. The preparation method of the material greatly improves the strength, toughness, hardness and wear resistance of traditional magnesium-based alloy materials.
The specific preparation method is as follows: First, the carbon nanotube powder is prepared by mixing the following metals calcium Ca, magnesium Mg, copper Cu, aluminum Al, nickel Ni and cobalt with water H2O in a nitrate solution, and each component is in accordance with the quality of 1:1:1: 1:1:1:11 ratio, the above-mentioned nitrate solution, nitric acid content of 60% aqueous solution and sodium hydroxide content of 40% aqueous solution are mixed uniformly in a mass ratio of 1:1:1, and the precipitate is filtered to obtain , And then placed in a vacuum drying oven at 550 ℃, calcination for 18 hours, and then ball mill in a ball mill to 20μm ultrafine powder as the reaction catalyst, the powder prepared by the above method is placed in a steel reactor, blowing into the steel reactor Into the mixed gas of propylene and nitrogen with a volume ratio of 9:1, the body pressure is 0.05-0.3Mpa, the gas flow rate is 0.4>3/Min, and nitrogen is the diluent to adjust the reaction rate and powder growth rate. The reaction temperature is 660℃, and the reaction time is 60>
 

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