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Crystalline state alloy spherical particle/amorphous alloy base composite material and manufacturing method thereof

A technology of amorphous alloys and spherical particles, which is applied in the field of design and preparation of amorphous composite materials, can solve the problems of poor plasticity of amorphous alloys, achieve the effect of reducing influence, shortening the preparation process and cost, and having good plasticity

Inactive Publication Date: 2008-07-16
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of crystalline alloy spherical particles / amorphous alloy matrix composite material and its preparation method, which can solve the problems of poor plasticity of amorphous alloys and the like

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  • Crystalline state alloy spherical particle/amorphous alloy base composite material and manufacturing method thereof
  • Crystalline state alloy spherical particle/amorphous alloy base composite material and manufacturing method thereof
  • Crystalline state alloy spherical particle/amorphous alloy base composite material and manufacturing method thereof

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preparation example Construction

[0019] The invention provides a preparation technology for a new type of amorphous composite material. Based on the metallurgical characteristics of immiscible alloys having immiscible regions of liquid components, through alloy type selection and chemical composition optimization design, crystalline alloy spherical particles / non-crystalline alloys can be obtained. There are three different types of composite materials: crystalline alloy matrix type, amorphous alloy spherical particle / crystalline alloy matrix type and amorphous alloy spherical particle / amorphous alloy matrix type. Its characteristic is that before the glass transition occurs in the alloy melt, the single-phase alloy melt first undergoes a liquid-liquid phase transition, forming two immiscible two-liquid phases L 1 and L 2 , where a liquid phase L 2 Distributed in another liquid phase L in the form of spherical droplets 1 in the matrix; during subsequent rapid cooling, the matrix liquid phase L 1 or disperse...

Embodiment 1

[0034] Using Fe-B master alloy and commercially available pure metal Cu, Fe, Si, B elements such as rods, blocks, ingots, plates and other bulk materials (purity higher than 99.9%) as the starting material, in titanium passivated argon Arc melting under gas atmosphere to form a master alloy ingot, the alloy composition (atomic percentage, the same below) is Cu 30 Fe 56 Si 7 B 7 . The master alloy ingot needs to be arc-melted several times to ensure the uniformity of the composition. Take an appropriate amount of master alloy material and place it in a quartz crucible with a nozzle, re-melt the alloy melt by induction heating under an argon atmosphere (cooling speed is 10 4 ~10 6 K / s) prepared as thin strips. The inner diameter of the quartz crucible is 14mm, the diameter of the nozzle is 0.7mm, the distance between the nozzle and the surface of the single roller is 0.3mm, and the linear speed of the single roller is 50m / s. The width of the thin strip prepared by the sin...

Embodiment 2

[0037] Using commercially available pure metals Al, Pb, Ni, Y, Co elements such as rods, blocks, ingots, plates and other bulk materials (purity higher than 99.9%) as starting materials, the same smelting method as in Example 1 was used to prepare Al 80.75 Pb 5 Ni 4.75 Y 7.6 co 1.9 Master alloy, prepare thin strip (cooling speed is 10 4 ~10 6 K / s). XRD, SEM results see Figure 3b and Figure 4b. The results show that the ribbon is composed of an amorphous AlNiCoY alloy matrix (in the AlNiCoY alloy matrix, the sum of the elements Al, Ni, Co, and Y accounts for 98.6% of the atomic proportion of the matrix, and the rest is Pb element) and crystalline Pb-rich spherical particles ( In the Pb-rich spherical particles, the atomic proportion of Pb accounts for 97.4%, and the rest are Al, Ni, Co, and Y elements. The atomic proportion of Al accounts for 0.2%, the atomic proportion of Ni accounts for 0.7%, the atomic proportion of Co accounts for 0.12%, and the atomic proportion of...

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Abstract

The invention belongs to the design and preparation technology of amorphous composites, which more particularly relates to a crystalline alloy spherical particle / amorphous alloy base composite and a preparation method and solves the problem of poor plasticity of amorphous alloy. The crystalline alloy spherical particles / amorphous alloy base composites comprise immiscible alloy M-N which consists of alloy elements M and N and other added alloy elements, which are mixed and dissolved with the alloy element M to form amorphous alloy base structure; the alloy element N is dispersed and distributed in the amorphous alloy base in the form of crystalline alloy spherical particles; before the glass transition of alloy melt, the liquid-liquid phase transformation firstly occurs to generate a rich M base liquid phase L1 and a rich N spherical liquid drop L2, wherein, a liquid phase L2 is distributed in the base of another liquid phase L1 in the form of spherical liquid drops; in the following fast cooling process, the base liquid phase L1 goes through glass transition, and the spherical particles are dispersed and distributed in the base after solidification to form the crystalline spherical particles / amorphous alloy base composites.

Description

technical field [0001] The invention belongs to the design and preparation technology of amorphous composite materials. Specifically, it combines the characteristics of immiscible alloy liquid-liquid phase change metallurgy and the characteristics of alloy glass transition to design a crystalline alloy spherical particle / amorphous alloy matrix Composite materials and methods for their preparation. Background technique [0002] Amorphous alloys (that is, metallic glasses) have a series of excellent properties such as high strength, high hardness, corrosion resistance, and isotropy, and are widely used in the fields of automobiles, aerospace, electronics, machinery, medical materials, and sporting goods. prospect. Usually, the formation condition of amorphous alloy is at 10 4 ~10 6 At K / s cooling rate, the alloy melt is cooled below its glass transition temperature T g , so that the alloy melt avoids crystal nucleation and crystallization, thereby rapidly solidifying to fo...

Claims

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Application Information

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IPC IPC(8): C22C45/00C22C1/00B22D21/00B22D27/04
Inventor 何杰赵九洲张显飞
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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