Quasicrystal particle strengthening magnesium-based amorphous alloy endogeny composite material and preparation method thereof

A particle-strengthened, amorphous alloy technology, applied in the field of amorphous alloy-based endogenous composite materials, to achieve good application prospects and improve plasticity and strength

Active Publication Date: 2013-12-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, at present, a large number of researches are only focused on Mg-Zn-RE quasicrystal-strengthened crystalline magnesiu

Method used

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  • Quasicrystal particle strengthening magnesium-based amorphous alloy endogeny composite material and preparation method thereof
  • Quasicrystal particle strengthening magnesium-based amorphous alloy endogeny composite material and preparation method thereof
  • Quasicrystal particle strengthening magnesium-based amorphous alloy endogeny composite material and preparation method thereof

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Experimental program
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Embodiment 1

[0040] In this embodiment, the elemental formula of the magnesium-based amorphous alloy composite reinforced by quasi-crystalline particles is Mg 66 Zn 29 Ca 4 Y 1 , and the microstructure of the composite material is composed of amorphous phase and quasi-crystalline phase, and the quasi-crystalline phase is mainly composed of Mg, Zn and RE elements, specifically Mg 3 Zn 6 Y 1 , which contains a small amount (less than 1%) of Ca. The amorphous phase is mainly composed of Mg, Zn and Ca elements, specifically Mg 71 Zn 25 Ca 4 , which contains only a small amount (less than 0.2%) of the Y element.

[0041] The preparation method of the above-mentioned quasi-crystalline particle reinforced magnesium-based amorphous alloy composite material is as follows:

[0042] (1) Select Mg, Zn, Ca and Y elements with a purity greater than 99.9%, according to Mg 66 Zn 29 Ca 4 Y 1 (atomic percentage), and smelting the above-mentioned alloy elements at 700°C to homogenize the alloy c...

Embodiment 2

[0052] In this example, the elemental composition, molecular formula and microstructure of the magnesium-based amorphous alloy composite reinforced by quasi-crystal particles are exactly the same as those in Example 1. The preparation method is basically the same as that in Example 1, except that in step (2), the alloy melt is solidified to room temperature at a rate of 40°C / min.

[0053] The scanning electron microscope photos of the above-mentioned thermodynamically stable quasi-crystal particles reinforced magnesium-based amorphous alloy endogenous composites are as follows: Figure 7 As shown, it can be seen that the quasi-crystalline particles are uniformly distributed in the amorphous matrix, and the average particle size of the quasi-crystalline particles is 50-55 μm, and the volume fraction is about 9%. The XRD spectra of thermodynamically stable quasicrystalline particle-strengthened quasicrystalline-amorphous composites are similar Figure 5 It can be seen that the ...

Embodiment 3

[0055] In this example, the elemental composition, molecular formula and microstructure of the magnesium-based amorphous alloy endogenous composite reinforced by quasi-crystal particles are exactly the same as those in Example 1. The preparation method is basically the same as that in Example 1, except that in step (2), the alloy melt is solidified to room temperature at a rate of 400°C / min.

[0056] The SEM photos of the thermodynamically stable quasicrystal particle-strengthened magnesium-based amorphous alloy endogenous composites prepared above are similar image 3 and 4 As shown, it can be seen that the quasi-crystalline particles are uniformly distributed in the amorphous matrix, and the average particle size of the quasi-crystalline particles is 25-35 μm. The XRD spectra of thermodynamically stable quasicrystalline particle-strengthened quasicrystalline-amorphous composites are similar Figure 5 It can be seen that the amorphous matrix diffuse peak and the quasi-cryst...

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Abstract

The invention provides a magnesium-based amorphous alloy endogeny composite material. A quasicrystal particle strengthening magnesium-based amorphous alloy matrix is stabilized by applying thermodynamics so as to form a quasicrystal-amorphous double-phase composite structure. Experiments prove that the composite structure can be used for effectively improving the plasticity and the strength of materials and is the magnesium-based amorphous composite material having a good application prospect. The invention also provides a preparation method of the quasicrystal-amorphous endogeny composite structure. The preparation method comprises the following specific steps: firstly. slowly cooling an alloy melt to a room temperature so as to obtain a primary quasicrystal phase strengthening quasicrystal-crystal composite tissue with certain size, shape and volume content, then heating so as to ensure that the crystal tissue is molten, and quasicrystal particles are kept stable, thus obtaining a semi-solid melt; finally retaining unmelted quasicrystal particles through a rapid solidification technology, and turning the melt into an amorphous phase, thus obtaining the quasicrystal-amorphous endogeny composite material. The preparation method is simple, easy to operate and strong in controllability and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials, and specifically prepares a thermodynamically stable quasicrystal-strengthened amorphous alloy matrix endogenous composite material through a "heating-semi-solid solidification method" on the basis of rationally designing alloy components. Background technique [0002] Since Mg-based amorphous alloy is an amorphous phase with uniform composition, there is no grain boundary and dislocation, so compared with crystalline Mg alloy, Mg-based amorphous alloy not only has higher strength (800-1000MPa), but also has higher strength (800-1000MPa). It showed a more uniform degradation rate and degradation performance. In the family of Mg-based amorphous alloys, Mg-Zn-Ca amorphous alloys have very good performance potential as a brand-new magnesium alloy biomedical material due to the good biocompatibility of all three elements. . Especially in 2008, Swiss scientists reported in "...

Claims

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Application Information

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IPC IPC(8): C22C45/00C22C1/02
Inventor 赵远云李润伟常春涛王新敏门贺
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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