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Large-size metallic glass composite material with tensile ductility and preparation method thereof

A technology of metallic glass and composite materials, which is applied in the field of metal matrix composite materials, can solve problems such as the application of plastic materials, and achieve the effects of eliminating shrinkage, simple and controllable process, and uniform structure

Inactive Publication Date: 2013-06-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, materials with only compression plasticity but no tensile plasticity cannot be used as plastic materials in engineering practice

Method used

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  • Large-size metallic glass composite material with tensile ductility and preparation method thereof
  • Large-size metallic glass composite material with tensile ductility and preparation method thereof
  • Large-size metallic glass composite material with tensile ductility and preparation method thereof

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preparation example Construction

[0017] The present invention has tensile plastic large-scale metallic glass composite material, and its alloy composition expression is: Zr a Ti b m c Cu d Ni e be f , where M is one of Nb, V or Hf, a, b, c, d, e, f represent atomic percentages, and the ranges are 10≤a≤70, 10≤b≤70, 4≤c≤20, 2≤d≤20, 0≤e≤15, 5≤f≤22.5, a+b+c+d+e+f=100. The preparation method of the above-mentioned metallic glass composite material comprises the following steps:

[0018] The first step: select the alloy elements Zr, Ti, M, Cu, Ni, Be with a purity greater than 99.5%, according to Zr a Ti b m c Cu d Ni e be f Proportioning is carried out, and the master alloy is melted in a pure argon atmosphere electric arc furnace with titanium oxygen absorption, so that the alloy composition is homogenized, and the master alloy profile is sucked and cast.

[0019] Step 2: Put the master alloy profile into the crucible, heat it to 1300°C-1350°C, keep it warm for 10-20 minutes, and perform overheating t...

Embodiment 1

[0039] (1) Selection of raw materials

[0040] The purity of each metal component that the present invention prepares master alloy ingot for selection is as table 1, and alloy composition is (Zr 4 TiNb) 80 (Cu 5 Ni 4 ) 10 be 10 i.e. Zr 60 Ti 14.5 Nb 5.5 Cu 5.6 Ni 4.4 be 10 (atomic percent).

[0041] Table 1 prepares the purity (%) of the metal component selected from the master alloy ingot

[0042]

[0043] (2) Preparation of master alloy ingot

[0044] 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:

[0045] 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; put the prepared material into the water-cooled copper crucible in the melting furnace according to the weight of about 80g per ingot, cover ...

Embodiment 2

[0056] Embodiment 2 adopts the method identical with embodiment 1, and alloy composition is (Zr 4 Ti 4 Nb) 81 Cu 6.5 be 12.5 i.e. Zr 36 Ti 36 Nb 9 Cu 6.5 be 12.5 (atomic percent). The prepared composite sample with a diameter of 30 mm has uniform structure and no defects, and the tensile plastic strain reaches 9%.

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Abstract

The invention discloses a large-size metallic glass composite material with tensile ductility and a preparation method thereof. A composition expression of the metallic glass composite material is ZraTibMcCudNieBef (atom percent), wherein M is one of Nb, V or Hf, a is not less than 10 and not more than 70, b is not less than 10 and not more than 70, c is not less than 4 and not more than 20, d isnot less than 2 and not more than 20, e is not less than 0 and not more than 15, f is not less than 5 and not more than 22.5, and a+b+c+d+e+f is equal to 100. The preparation method is called after semi-solid progressive solidification method, which comprises the following steps of: smelting master alloy ingots and casting into master alloy profiles; putting the master alloy profiles into a crucible and heating until the profiles are completely melted, and performing the overheating processing to dissolve impurity phases; reducing the temperature to a solid-liquid two-phase region; performingsemi-solid processing, and controlling the shape and the size of a precipitated solid solution phase; and then performing the semi-solid progressive solidification to form the large-size metallic glass composite material with tensile ductility. By adopting the method, the homogeneous and defect-free large-size (30 mm) metallic glass composite material is prepared, and the composite material has remarkable work hardening capacity and excellent tensile strength and ductility.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials, specifically, on the basis of rational design of alloy components, a semi-solid sequential solidification technology is invented to prepare a large-sized, defect-free, and uniform endogenous plastic phase metallic glass composite material , the composite material has good room temperature tensile plasticity and work hardening properties. Background technique [0002] Bulk metallic glass (BMG) has a series of excellent mechanical properties different from traditional crystalline alloys, such as high strength, high hardness, low elastic modulus and large elastic strain limit, making it considered as a very potential structural material . However, the highly localized shear behavior allows BMG materials to undergo catastrophic fracture in the form of sudden failure without obvious room temperature macroscopic plastic deformation, which severely restricts the large-scale app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/10C22C45/00
CPCC22C45/10C22C45/001
Inventor 陈光成家林
Owner NANJING UNIV OF SCI & TECH
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