A kind of toughened metallic glass composite material and preparation method thereof

A technology of metallic glass and composite materials, applied in the field of metal matrix composite materials, can solve the problems of reducing strength and achieve the effect of increasing strength

Active Publication Date: 2018-06-22
NANJING BAOZUAN SPRING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the acquisition of the plasticity of the above-mentioned metallic glass composite material greatly reduces the strength

Method used

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  • A kind of toughened metallic glass composite material and preparation method thereof
  • A kind of toughened metallic glass composite material and preparation method thereof
  • A kind of toughened metallic glass composite material and preparation method thereof

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preparation example Construction

[0018] The preparation method of the toughened metallic glass composite material, its specific preparation process is:

[0019] Step 1: Select alloying elements with a purity greater than 99.5%, and make proportions according to the predetermined composition of the basic alloy. First, use a non-consumable electric arc furnace to melt evenly under an argon protective atmosphere;

[0020] Step 2: Break the base alloy into powder, add the corresponding zirconia or titanium oxide powder and mix evenly, put it into a graphite crucible, heat it up to 2000°C by induction, and use the high temperature diffusion of oxygen to make the added zirconia or titanium oxide Transformation of titanium precursor powder into high oxygen content and high melting point α -Zr or α -Ti phase, and the precipitation is regulated by the holding time α -Zr or α - the size of the Ti solid solution phase.

[0021] Step 3: Use directional solidification equipment to implement rapid sequential solidifica...

Embodiment 1

[0035] (1) Selection of raw materials

[0036] The purity of each metal component that the present invention prepares base alloy for selection is as table 1, and alloy composition is Zr 60 Ti 14.6 Nb 5.4 Cu 5.6 Ni 4.4 be 10 (atomic percent). The added precursor is zirconia powder with a particle size of 15 μm.

[0037] Table 1 The purity (%) of metal components selected for the preparation of basic alloys

[0038]

[0039] (2) Preparation of base alloy

[0040] Under the protection of high-purity argon gas, the master alloy button ingot is melted in a non-consumable arc melting furnace. The specific procedure is as follows:

[0041] 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 Vacuum the upper furn...

Embodiment 2

[0052] Adopt the method identical with embodiment 1, basic alloy composition is Zr 60 Ti 14.6 Nb 5.4 Cu 5.6 Ni 4.4 be 10 (atomic percent), add 0.5% (weight percent) of titanium oxide powder with a particle size of 10 μm. The room temperature tensile yield strength and plastic strain of the composite reached 1350MPa and 7.3%, respectively.

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Abstract

The invention discloses a strengthened and toughened metallic glass composite material and a preparation method thereof. The preparation method is as follows: (1) selecting β-Zr / metallic glass composite material or β-Ti / metallic glass composite material as the base alloy; (2 ) Add 0.5‑2% (weight percentage) of zirconia or titanium oxide powder; (3) Break the base alloy into powder, and mix the added zirconia or titanium oxide powder evenly, put it into a crucible and heat it to melt, and Rapid sequential solidification is implemented to obtain a metallic glass composite with a core-shell structure precipitated phase. The invention prepares a high-strength and high-toughness large-scale metallic glass composite material, and the composite material has remarkable work hardening ability and excellent tensile strength and plasticity.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials, and in particular relates to a high-strength and high-toughness metallic glass composite material and a preparation method thereof. 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 application of BMG as advanced structural materials in engineering. application. Therefore, the problem of room temperature brittleness has developed into an important bottleneck for the application of BMG mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/10
CPCC22C45/10C22C1/11
Inventor 成家林初雅杰杨宗辉李晓泉
Owner NANJING BAOZUAN SPRING CO LTD
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