Preparation method of reinforced magnesium matrix composite

A composite material and reinforcing phase technology, which is applied in the field of preparation of reinforced magnesium matrix composite materials, can solve the problem of uneven distribution of reinforcing phase, poor interface reaction between reinforcing phase and magnesium matrix, and inconsistency in structural design of carbon nanotube-alumina composite reinforcing phase. It can achieve the effect of stable physical and chemical properties, good degree of graphitization and structural integrity.

Active Publication Date: 2016-05-04
HEBEI UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a reinforced magnesium-based composite material, which is a method of in-situ growing carbon nanotubes on nano-silicon carbide particles to prepare carbon nanotube-silicon carbide in-situ composites. Reinforcement phase, on the basis of liquid-phase mechanical stirring and mixing, the method of preparing carbon nanotube-silicon carbide hybrid reinforced magnesium-based composite materials by spark plasma sintering process overcomes the existing shortcomings of the existing prepar

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  • Preparation method of reinforced magnesium matrix composite
  • Preparation method of reinforced magnesium matrix composite
  • Preparation method of reinforced magnesium matrix composite

Examples

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Embodiment 1

[0029] The first step, the preparation of carbon nanotube-silicon carbide in-situ composite reinforcement phase:

[0030] Add nickel acetate to ethylbenzene to ensure that the concentration of nickel acetate in ethylbenzene is 0.2g / mL, use a magnetic stirrer to stir the above liquid at a speed of 350r / min for 5min, so that nickel acetate is fully dissolved in ethylbenzene to prepare To obtain the ethylbenzene solution of nickel acetate, the required amount of silicon carbide particles with a particle size of 20nm is placed in a quartz ark, and the quartz ark is placed in the constant temperature zone of a horizontal tube furnace, and the tube furnace is closed by a vacuum pump. The vacuum at the place of the quartz ark reaches -0.1MPa, then feeds hydrogen into the tube furnace with a flow rate of 550mL / min, and feeds argon into the tube furnace with a flow rate of 400mL / min simultaneously, and the The temperature of the tube furnace was raised to 700°C, and the argon gas was t...

Embodiment 2

[0041] The implementation conditions and process of this embodiment are the same as in Example 1, except that the mass ratio of carbon nanotube-silicon carbide in-situ composite reinforcement phase to magnesium powder is 0.2:1 in the second step, and the carbon nanotube-silicon carbide Silicon hybrid reinforced magnesium-based composite material, wherein the magnesium-based composite material has a mass percent content of carbon nanotubes of 0.783 percent and a mass percent content of silicon carbide of 15.883 percent.

Embodiment 3

[0043] The first step, the preparation of carbon nanotube-silicon carbide in-situ composite reinforcement phase:

[0044] Add nickel acetate to ethylbenzene to ensure that the concentration of nickel acetate in ethylbenzene is 1.0g / mL, use a magnetic stirrer to stir the above liquid at a speed of 650r / min for 20min, so that nickel acetate is fully dissolved in ethylbenzene to prepare To obtain the ethylbenzene solution of nickel acetate, the required amount of silicon carbide particles with a particle diameter of 100nm is placed in a quartz ark, the quartz ark is placed in the constant temperature zone of a horizontal tube furnace, and the tube furnace is closed by a vacuum pump. The vacuum at the place where the quartz ark is located reaches -0.05MPa, then feeds hydrogen into the tube furnace at a flow rate of 1000mL / min, and feeds argon into the tube furnace at a flow rate of 1000mL / min at the same time, and the The temperature of the tube furnace was raised to 1100°C, and t...

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Abstract

The invention provides a preparation method of a reinforced magnesium matrix composite and relates to an alloy which contains non-metal fibers or filaments and is manufactured through contact of fibers or filaments with molten metal. According to the preparation method, carbon nanotubes grow on nano silicon carbide particles in situ with a floating catalytic method, then carbon nanotube-silicon carbide in-situ composite reinforcement phases are prepared, and the carbon nano tube-silicon carbide hybrid reinforced magnesium matrix composite is prepared with a spark plasma sintering process on the basis of mechanical stirring and mixing of a liquid phase. The defects that an existing preparation method of a reinforced magnesium matrix composite has a poor carbon nanotube synthesis effect, structural damage is easily caused, the reinforcement effect is poor, reinforcement phases are non-uniformly distributed in a magnesium matrix, the reinforcement phases and the magnesium matrix have a poor interface reaction easily, carbon nanotube-aluminum oxide composite reinforcement phases have poor structural design and are not suitable for serving as reinforcement phases of the magnesium matrix composite, and the mechanical performance of the prepared magnesium matrix composite is non-ideal are overcome.

Description

technical field [0001] The technical solution of the invention relates to the manufacture of an alloy containing non-metallic fibers or filaments by contacting the fibers or filaments with molten metal, specifically a method for preparing reinforced magnesium-based composite materials. Background technique [0002] Magnesium-based composites are metal-based composites that use magnesium or magnesium alloys as the matrix material and particles, whiskers or fibers as the reinforcing phase. Magnesium-based composites inherit the advantages of low density, good vibration damping, good damping and machinability of pure magnesium, overcome the shortcomings of low hardness and unstable chemical properties of pure magnesium, and have good thermal stability, high specific modulus and Excellent performance of high specific stiffness. Therefore, as a new type of metal matrix composite material with excellent comprehensive performance, magnesium matrix composite material has great appl...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/05C22C1/10C22C32/00C22C47/14C22C49/04C22C49/14C22C101/10
CPCC22C1/0408C22C1/05C22C1/1005C22C23/00C22C32/0047C22C32/0084C22C47/14C22C49/04C22C49/14
Inventor 李海鹏程里宋晓庆范佳薇徐扬连鹏豪陈松
Owner HEBEI UNIV OF TECH
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