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TiAl-based bulk amorphous alloy and preparation method thereof

A technology of amorphous alloys and large blocks, which is applied in the field of new material manufacturing, can solve problems such as complex shapes of large amorphous alloys, achieve the effect of improving strength and hardness, and improving industrial production efficiency

Inactive Publication Date: 2016-08-17
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention solves the production problem of bulk amorphous alloy with large size and complex shape, and the obtained alloy significantly improves the strength and hardness of the material, and has excellent mechanical properties

Method used

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  • TiAl-based bulk amorphous alloy and preparation method thereof
  • TiAl-based bulk amorphous alloy and preparation method thereof
  • TiAl-based bulk amorphous alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Preparation of a TiAl-based bulk amorphous alloy. The specific method is: high-purity metal powders Ti (purity 99.99%, 300 mesh), Al (purity 99.99%, 300 mesh), B (purity 99.99%, 300 mesh) are weighed according to the atomic number ratio of 60:30:10 and Carry out ball milling, pass into high-purity argon in the ball milling tank and protect, the ball mill rotating speed is 350r / min, the ball material ratio is 30: 1 (the grinding balls are respectively mixed with large, medium and small, and its diameter is 20mm, 8mm, 6mm The general ratio is Φ20:Φ8:Φ6=3:100:500. The following examples are the same), and the amorphous powder is obtained after ball milling for 40 hours in the manner of "running for 30 minutes, stopping for 12 minutes, and then running in reverse for 30 minutes".

[0038] The prepared amorphous powder is pre-pressed at 20Mpa and subjected to spark plasma sintering, the block is placed in a graphite mold, and the temperature is raised to 1073K at a rate of 40...

Embodiment 2

[0044] Preparation of a TiAl-based bulk amorphous alloy. The specific method is: high-purity metal powders Ti (purity 99.99%, 300 mesh), Al (purity 99.99%, 300 mesh), B (purity 99.99%, 300 mesh) are weighed according to the atomic ratio of 55:30:15 and carried out For ball milling, high-purity argon gas is introduced into the ball mill tank for protection, the ball mill speed is 350r / min, the ball-to-material ratio is 30:1, and after 40 hours of ball milling in the manner of "running for 30 minutes, stopping for 12 minutes, and then running in reverse for 30 minutes", the obtained Amorphous powder.

[0045] The prepared amorphous powder is pre-pressed at 20Mpa and subjected to spark plasma sintering, the block is placed in a graphite mold, and the temperature is raised to 1073K at a rate of 40k / min at 40Mpa, kept for 10min, and then cooled with the furnace. An amorphous bulk alloy is obtained.

[0046] The sintered block is subjected to XRD diffraction analysis, see Figure...

Embodiment 3

[0049] Preparation of a TiAl-based bulk amorphous alloy. The specific method is: high-purity metal powders Ti (purity 99.99%, 300 mesh), Al (purity 99.99%, 300 mesh), B (purity 99.99%, 300 mesh) are weighed according to the atomic ratio of 50:30:20 and carried out For ball milling, high-purity argon gas is introduced into the ball mill tank for protection, the ball mill speed is 350r / min, the ball-to-material ratio is 30:1, and after 40 hours of ball milling in the manner of "running for 30 minutes, stopping for 12 minutes, and then running in reverse for 30 minutes", the obtained Amorphous powder.

[0050] The prepared amorphous powder is pre-pressed at 20Mpa and subjected to spark plasma sintering, the block is placed in a graphite mold, and the temperature is raised to 1073K at a rate of 40k / min at 40Mpa, kept for 10min, and then cooled with the furnace. An amorphous bulk alloy is obtained.

[0051] The sintered block is subjected to a three-point bending strength test, a...

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Abstract

The invention discloses TiAl-based bulk amorphous alloy. The chemical expression of the elemental composition of the alloy is TiaAlbBc, wherein a, b and c mean the atomic percentage content of Ti, Al and B in the alloy correspondingly, a is larger than or equal to 50 and less than or equal to 60, b is equal to 30, c is larger than or equal to 10 and less than or equal to 20, and a+b+c=100. According to the TiAl-based bulk amorphous alloy, a large number of elements B are added, and the bulk amorphous alloy is prepared by combining a mechanical alloy method with a spark plasma sintering method; the production problems that bulk amorphous alloy is large in size and complex in shape are solved; and the obtained alloy remarkably improves the strength and the hardness of the material and has excellent mechanical properties.

Description

technical field [0001] The invention relates to a preparation method of a TiAl-based ternary amorphous alloy, belonging to the technical field of new material manufacture. Background technique [0002] In recent years, with the development of material science and the impact of the energy crisis, the aerospace industry has an increasingly urgent need for new structural materials with high strength, high hardness, low density, and high elastic modulus. Bulk amorphous alloy materials have excellent mechanical properties such as high strength, high hardness, large elastic strain limit, no work hardening phenomenon, high wear resistance, etc., and have superior soft and hard magnetic properties, good corrosion resistance, etc., and gradually cause Scientific researchers from all over the world have paid attention to and conducted in-depth research. [0003] The new titanium-aluminum alloy has the advantages of low density, high strength, high temperature resistance and good corr...

Claims

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Application Information

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IPC IPC(8): C22C45/10B22F9/04B22F3/105
CPCB22F3/006B22F3/105B22F9/005B22F2003/1051B22F2998/10C22C45/10B22F3/02
Inventor 李强许超群王兴华史少凯冯雨婷刘帅帅董闯
Owner HEBEI UNIV OF TECH
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