Mg-Ni-(Gd,Nd) bulk amorphous alloy and preparation thereof

A technology of amorphous alloy and bulk, applied in the field of magnesium alloy material and its preparation, Mg-Ni-based bulk amorphous alloy and its preparation, can solve the problem of low formation ability of Mg-Ni-RE based amorphous, resistance Poor corrosion ability, poor plasticity of amorphous alloys, etc., to achieve high amorphous formation ability, good corrosion resistance, and high specific strength

Inactive Publication Date: 2009-02-25
凤阳天镁新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of Mg-Ni-(Gd, Nd) system bulk amorphous alloy and preparation method thereof, make it solve the poor plasticity of Mg-Cu-RE base amorphous alloy, Poor corrosion resistance, and Mg-Ni-RE-based amorphous formation ability is low, with good plasticity and high amorphous formation ability and high corrosion resistance

Method used

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  • Mg-Ni-(Gd,Nd) bulk amorphous alloy and preparation thereof
  • Mg-Ni-(Gd,Nd) bulk amorphous alloy and preparation thereof
  • Mg-Ni-(Gd,Nd) bulk amorphous alloy and preparation thereof

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1, the Mg of diameter 5mm 75 Ni 15 Gd 5 Nd 5 bulk amorphous alloy

[0026] Step 1, according to Mg 75 Ni 15 Gd 5 Nd 5 Raw materials of magnesium, nickel and rare earth gadolinium and neodymium are prepared: Mg, Ni, Gd and Nd metals with a purity greater than 99% and a molar ratio of 75:15:5:5 are used.

[0027] Step 2, vacuumize the electric arc furnace to 3×10 -3 Pa, filled with a pure argon atmosphere with a purity greater than 99.99% to a pressure of 0.5 atm. The arc melting of titanium absorbs oxygen in the atmosphere, and then the raw materials of the first step, gadolinium and neodymium, are repeatedly smelted and purified four times in the electric arc furnace.

[0028] Step 3, vacuumize the electric arc furnace to 3×10 -3 Pa, filled with a pure argon atmosphere with a purity greater than 99.99% to a pressure of 0.5 atm. Arc melting titanium absorbs oxygen in the atmosphere, then mix and melt the gadolinium and neodymium obtained in the seco...

Embodiment 2

[0034] Embodiment 2, the Mg of diameter 3.5mm 75 Ni 15 Gd 7.5 Nd 2.5 bulk amorphous alloy

[0035] Step 1: According to Mg 75 Ni 15 Gd 5 Nd 5Prepare magnesium, nickel and rare earth gadolinium and neodymium raw materials: Mg, Ni, Gd and Nd metals with a purity greater than 99% and a molar ratio of 75:15:7.5:2.5 are used.

[0036] Step 2: Vacuum the electric arc furnace to 3×10 -3 Pa, filled with a pure argon atmosphere with a purity greater than 99.99% to a pressure of 0.5 atm. The arc melting of titanium absorbs oxygen in the atmosphere, and then the raw materials of the first step, gadolinium and neodymium, are repeatedly smelted and purified four times in the electric arc furnace.

[0037] Step 3, vacuumize the electric arc furnace to 3×10 -3 Pa, filled with a pure argon atmosphere with a purity greater than 99.99% to a pressure of 0.5 atm. Arc melting titanium absorbs oxygen in the atmosphere, then mix and melt the gadolinium and neodymium obtained in the second...

Embodiment 3

[0043] Embodiment 3, the Mg of diameter 3.5mm 75 Ni 15 Gd 2.5 Nd 7.5 bulk amorphous alloy

[0044] Step 1: According to Mg 75 Ni 15 Gd 5 Nd 5 Prepare magnesium, nickel and rare earth gadolinium and neodymium raw materials: Mg, Ni, Gd and Nd metals with a purity greater than 99% and a molar ratio of 75:15:2.5:7.5 are used.

[0045] Step 2: Vacuum the electric arc furnace to 3×10 -3 Pa, filled with a pure argon atmosphere with a purity greater than 99.99% to a pressure of 0.5 atm. The arc melting of titanium absorbs oxygen in the atmosphere, and then the raw materials of the first step, gadolinium and neodymium, are repeatedly smelted and purified four times in the electric arc furnace.

[0046] Step 3, vacuumize the electric arc furnace to 3×10 -3 Pa, filled with a pure argon atmosphere with a purity greater than 99.99% to a pressure of 0.5 atm. Arc melting titanium absorbs oxygen in the atmosphere, then mix and melt the gadolinium and neodymium obtained in the secon...

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Abstract

The invention discloses Mg-Ni-(Gd, Nd) system bulk amorphous alloy and a preparation method thereof in the technical field of metal material. The structural formula of the alloy is Mg75Ni15Gd10-xNdx, wherein, x is the atomic percent of Nd element, and x is more than 1 and less than 10. The method for preparing the alloy comprises the following steps: Ni, Gd and Nd are mixed and smelted evenly in an electric arc furnace in argon atmosphere absorbed with titanium according to the required atomic mixture ratio to obtain a ternary alloy cast ingot; the ternary alloy which is crushed into fine particles and a Mg block are slowly heated for 15 to 20 minutes until being melted evenly by electromagnetic induction by adopting a graphite crucible at an atmosphere to obtain a master alloy ingot; and the bulk amorphous alloy is obtained by adopting the spray cast copper mould cooling method. Mg-based bulk amorphous alloy of Mg-Ni-(Gd, Nd) system is characterized by good amorphous forming capability, low density, high specific tenacity, more than 1 percent of plasticity, as well as excellent thermal stability and corrosion resistance.

Description

technical field [0001] The invention relates to a magnesium alloy material in the technical field of metal materials and a preparation method thereof, in particular to a Mg-Ni-(Gd, Nd) bulk amorphous alloy and a preparation method thereof. Background technique [0002] With the rapid development of my country's aerospace industry and automobile industry, the lightweight of spacecraft and automobiles has become an eternal pursuit. Magnesium alloys have high specific strength, specific stiffness, and specific elastic modulus, and have increasingly become the focus of material workers. In contrast, the yield strength and fracture strength of magnesium-based bulk amorphous alloys are much higher than ordinary magnesium alloys, and their advantages of high specific strength are more prominent. The magnesium-based bulk amorphous alloys currently studied are mainly concentrated in the copper-containing Mg-Cu-RE (Y, Gd, etc.) system. The alloy of this system does not have obvious p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00C22C1/03
Inventor 袁广银尹健丁文江
Owner 凤阳天镁新材料科技有限公司
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