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Bispherical crystal phase/zirconium-based amorphous composite material and preparation method thereof

A composite material, zirconium-based amorphous technology, applied in the field of metal matrix composite materials, can solve the problem of sacrificing material strength, achieve excellent performance, simple and controllable preparation method, and novel double composite structure

Active Publication Date: 2018-07-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the solid solution phase can enhance the plasticity of amorphous composites to a certain extent, it will seriously sacrifice the strength of the material

Method used

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  • Bispherical crystal phase/zirconium-based amorphous composite material and preparation method thereof
  • Bispherical crystal phase/zirconium-based amorphous composite material and preparation method thereof
  • Bispherical crystal phase/zirconium-based amorphous composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Selection of raw materials

[0043] The purity of each metal component that the present invention prepares master alloy ingot for selection is as table 1, and alloy composition is

[0044] (Zr 56.2 Ti 13.8 Nb 5.0 Cu 6.9 Ni 5.6 be 12.5 ) 99 C 1 (abbreviation: S1+C1 ) (atomic percent).

[0045] Table 1 Purity of selected metal components for preparing master alloy ingots (%)

[0046] alloy element

Zr

Ti

Cu

Ni

be

Nb

C

purity / %

99.95

99.95

99.99

99.99

99.5

99.9

99.99

[0047] (2) Preparation of master alloy ingot

[0048] Under the conditions of Ti inhalation and high-purity argon protection, master alloy buckle ingots are melted in a non-consumable arc melting furnace. The specific procedures are as follows:

[0049] a. After mechanically grinding the surface of the metal raw material to remove the oxide skin on the surface, prepare the material according to the designed composition ratio; ...

Embodiment 2

[0061] Adopt the method identical with embodiment 1, alloy composition is: (Zr 56.2 Ti 13.8 Nb 5.0 Cu 6.9 Ni 5.6 be 12.5 ) 99.5 C 0.5 , prepared a bulk metallic glass composite sample with a diameter of 6 mm in the form of β-Zr(Ti) phase and ZrC phase double spherulites, and its microstructure is shown in Figure 4 As shown, there are two nearly spherical phases distributed on the amorphous matrix, with average sizes of about 20 μm and 4 μm, respectively, analyzed by XRD ( image 3 ), it was found that the two phases of this size were β-Zr (Ti) phase and ZrC phase, and both phases were precipitated in situ in the matrix, and combined well with the interface of the amorphous matrix.

Embodiment 3

[0063] Adopt the similar method with embodiment 1, alloy composition is: (Zr 60 Ti 14.67 Nb 5.33 Cu 5.56 Ni 4.44 be 10 ) 99 C 1 , under the condition of semi-solid heat preservation for 50 minutes, a bulk metallic glass composite material sample with a diameter of 6 mm and a double spherulite composite of β-Zr(Ti) phase and ZrC phase was prepared, and its microstructure is shown in Figure 5 As shown, two nearly spherical phases are distributed on the amorphous matrix, with an average size of about 35 μm and 8 μm, respectively, analyzed by XRD ( image 3 ), it was found that the two phases of this size were β-Zr (Ti) phase and ZrC phase, and both phases were precipitated in situ in the matrix, and combined well with the interface of the amorphous matrix.

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Abstract

The invention discloses a bispherical crystal phase / zirconium-based amorphous composite material and a preparation method thereof. A chemical formula of the zirconium-based amorphous composite material is (ZraTibCucNidNbeBef)Cg(atomic percent), wherein 35<=a<=70, 5<=b<=15, 5<=c<=20, 2<=d<=12, 5<=e<=15, 5<=f<=23, 0.5<=g<=2, and a+b+c+d+e+f+g=100. According to a material composite principle, material plasticity is improved by compounding of a large-size plastic phase beta-Zr(Ti) on an amorphous substrate, and material yield strength is enhanced by compounding of a fine and uniform ceramic phaseZrC. The preparation method includes: smelting master alloy ingots, and casting into a master alloy section material; heating the master alloy section material in a crucible to melt completely, cooling to a liquid-solid phrase area after overheating treatment is performed for certain time, performing semi-solid state treatment to control phase morphology and size, and adopting a quick progressivesolidification method to obtain the beta-Zr(Ti) phase and ZrC phase bispherical crystal phase combined zirconium-based amorphous composite material.

Description

technical field [0001] The invention belongs to the technical field of metal-matrix composite materials, in particular a zirconium-based amorphous composite material with double spherical phases and a preparation method thereof. Background technique [0002] Compared with traditional materials, bulk metallic glass (BMG) has the advantages of high strength and high hardness, but its special atomic structure also leads to its serious defect of room temperature brittleness, which hinders the application of BMG in engineering. Therefore, finding ways to improve the plasticity of BMG has always been a hot issue in the research of amorphous alloys. [0003] Researchers have also made a lot of efforts to solve this problem. In 2000, the Johnson research group in the United States prepared micron-sized β-Zr(Ti) for the first time by adding Nb alloying elements to the Zr-Ti-Cu-Ni-Be alloy system. Solid solution phase plasticized BMG composites, and then Chen Guang et al. performed s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/10C22C1/00
CPCC22C45/10C22C1/11
Inventor 陈光薛怡然苏翔李沛张亚东黄博
Owner NANJING UNIV OF SCI & TECH