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A kind of carbon nanotube reinforced magnesium-nickel based amorphous composite material and preparation method thereof

An amorphous composite material and a technology of carbon nanotubes, which are applied in the field of carbon nanotube reinforced magnesium-nickel-based amorphous composite materials and their preparation, can solve the problems of low toughness of magnesium-based amorphous alloys, and achieve high amorphous forming ability, The effect of good toughness and broad application prospects

Inactive Publication Date: 2017-02-22
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose a carbon nanotube-reinforced magnesium-nickel-based amorphous composite material and a preparation method thereof. By adding carbon nanotubes, a magnesium-based bulk amorphous composite material is prepared to overcome the current magnesium-based amorphous alloy with too high toughness. low problem, enrich the composition system of amorphous alloys, and obtain amorphous composite materials with high amorphous forming ability, high strength and high toughness

Method used

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  • A kind of carbon nanotube reinforced magnesium-nickel based amorphous composite material and preparation method thereof
  • A kind of carbon nanotube reinforced magnesium-nickel based amorphous composite material and preparation method thereof
  • A kind of carbon nanotube reinforced magnesium-nickel based amorphous composite material and preparation method thereof

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preparation example Construction

[0018] The preparation method of the carbon nanotube reinforced magnesium-nickel-based amorphous composite material proposed by the present invention comprises the following steps:

[0019] (1) Metal Ni, Gd and Ag are weighed according to the mass percentage of 28.4%:50.7%:20.9%, mixed with each other, and melted at 2700°C for 30 seconds in a high-purity argon protective atmosphere with a purity of 99.99%. The pressure is 0.8 atmospheric pressure, and electromagnetic stirring is performed while melting to ensure the uniformity of the alloy. After cooling, the composition is Ni 15 Gd 10 Ag 6 ternary master alloy ingot;

[0020] (2) After the ternary master alloy ingot obtained in the above step (1) is crushed, it is mixed with metal Mg of the same quality, and smelted in an induction furnace to obtain a composition of Mg 69 Ni 15 Gd 10 Ag 6 master alloy ingot;

[0021] (3) Grinding the master alloy ingot prepared in the above step (2) into an alloy powder with a particle...

Embodiment 1

[0025] In embodiment 1-5, embodiment 1 is the comparative example of the present invention, and preparation diameter is the Mg of 3.0mm 69 Ni 15 Gd 10 Ag 6 Amorphous alloy, embodiment 2-5 is preparation (carbon nanotube) X -(Mg 69 Ni 15 Gd 10 Ag 6 ) 100-X Bulk (X=1,2,3,4) amorphous composites.

[0026] Use Mg, Ni, Gd, Ag with a raw material purity ≥ 99.9% to prepare master alloy-Mg at a mass ratio of 35.1%: 18.4%: 32.9%: 13.6% 69 Ni 15 Gd 10 Ag 6 . Adding multi-walled carbon nanotubes with a purity of ≥95% to prepare the final magnesium-based bulk amorphous composite material.

[0027] Firstly, Ni, Gd and Ag are mixed according to the mass percentage of 28.4%:50.7%:20.9%, and melted in an electric arc furnace to obtain an intermediate alloy ingot with uniform composition. Before smelting, the electric arc furnace chamber is vacuumed to 1.2×10 -3 Pa is filled with 0.8 atmospheric pressure of high-purity argon as a protective gas. The smelting process starts with...

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Abstract

The invention relates to a carbon nano tube reinforced Mg-Ni based amorphous composite material and a preparation method thereof and belongs to the technical field of metal alloy composite materials. The amorphous composite material provided by the invention takes Mg-Ni as major elements and comprises the ingredients as follows: (carbon nano tube)X-(Mg69Ni15Gd10Ag6)100-X. The preparation method comprises the following steps: smelting Ni, Gd and Ag into a Ni15Gd10Ag6 ternary intermediate alloy ingot; mixing the intermediate alloy ingot and a corresponding amount of metal Mg, and performing smelting to obtain a Mg69Ni15Gd10Ag6 master alloy; and grinding the master alloy into alloy powder, mixing the alloy powder and carbon nano tube particles, and performing smelting and die casting to obtain the carbon nano tube reinforced Mg-Ni based amorphous composite material with the ingredients of (carbon nano tube)X-(Mg69Ni15Gd10Ag6)100-X. The carbon nano tube reinforced Mg-Ni based amorphous composite material prepared according to the method has the advantages of high amorphous forming capability, higher strength and better toughness than a simplex Mg based amorphous alloy, and the like, so that Mg based bulk amorphous composite materials have wide application prospects in the fields of novel light-weight structural materials and the like.

Description

technical field [0001] The invention relates to a carbon nanotube-reinforced magnesium-nickel-based amorphous composite material and a preparation method thereof, belonging to the technical field of metal alloy composite materials. Background technique [0002] The rapid development of industries such as automobiles and aerospace has put forward higher requirements for lightweight alloys, which require light metal alloys to have high strength and high toughness. Due to the special atomic arrangement structure different from that of crystals, amorphous materials exhibit special properties such as ultra-high specific strength, ultra-high corrosion resistance, and low thermal expansion coefficient that cannot be achieved by traditional materials. In addition, amorphous materials have excellent supercooled liquid precision formability, which can realize short-process precision machining of parts with complex shapes, and have attracted extensive attention from researchers. As a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00C22C1/03
Inventor 赵平李双寿
Owner TSINGHUA UNIV