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Method for preparing high-entropy reinforced amorphous alloy composite material

An amorphous alloy and high-entropy alloy technology, which is applied in the field of new laser suspension melting supersonic powder airflow deposition to prepare amorphous alloy composite materials, can solve the problems of amorphous alloy difficulty, brittleness affecting application, etc., and achieves breakthrough in size limitation, The effect of simple equipment and good physicochemical compatibility

Pending Publication Date: 2022-01-21
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, the amorphous forming ability of the alloy is also closely related to the composition of the alloy. At present, it is difficult to find alloys with high amorphous forming ability and high plastic deformation ability.
[0004] In summary, amorphous alloys have many performance advantages that traditional crystal alloys do not have, but their own brittleness affects its further application; at the same time, due to the limitations of amorphous forming ability and preparation process, the preparation of large size ( 10mm or more) amorphous alloys are still extremely difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix the Zr-Al-Ni-Cu amorphous alloy powder and the Co-Cr-Ni-Zr-Fe high-entropy alloy powder uniformly according to the designed composition ratio. The particle size of the Zr-Al-Ni-Cu alloy powder is between 70 and 70 150μm, the particle size of Co-Cr-Ni-Zr-Fe high-entropy alloy powder is 5-8μm, and the Co-Cr-Ni-Zr-Fe high-entropy alloy powder accounts for 10% of the volume fraction of the mixed powder. in the supply silo.

[0035] 1 Adjust the powder supply and gas pressure. Firstly, the gas is turned on, and the air flow path is determined according to the shape of the trajectory formed by the air flow, and then the laser is turned on to determine the relative positions of the air flow, the laser beam and the substrate. The distance between the laser focus and the substrate is 14mm; laser power: 270W.

[0036] 2. Set the powder supply temperature to 25°C, the gas pressure to 80psi, and the angle between the airflow and the laser beam to be 15 degrees, and the two ar...

Embodiment 2

[0042] The difference from Example 1 is that:

[0043] Amorphous powder is Cu-Zr-Al-Y alloy powder, high-entropy alloy powder is Zr-Al-Cr-Ni-Fe alloy powder, Cu-Zr-Al-Y alloy powder particle size is 70~150μm , the particle size of Zr-Al-Cr-Ni-Fe high-entropy alloy powder is 2-7 μm, the Zr-Al-Cr-Ni-Fe high-entropy alloy powder accounts for 8% of the mixed powder volume, and the powder supply temperature is 200 ℃ , the laser power is 400W, the airflow direction is perpendicular to the substrate, and the laser and the airflow direction are at an angle of 30 degrees. The vertical distance between the laser focus and the substrate is 4mm. The prepared amorphous composite material has a ring shape, a thickness of 3 mm, an outer diameter of 20 mm, and an inner diameter of 10 mm. Compared with the Cu-Zr-Al-Y amorphous alloy without the addition of high-entropy reinforcing phase (Zr-Al-Cr-Ni-Fe), the room temperature plasticity is improved by more than 200% (composite room temperatur...

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Abstract

The invention belongs to the technical field of amorphous alloy preparation, and relates to a method for preparing a high-entropy reinforced amorphous alloy composite material. The method comprises the following steps that amorphous alloy powder and high-melting-point high-entropy alloy powder with high toughness are evenly mixed according to a designed volume fraction, the mixed powder is conveyed out through airflow with supersonic speed, and the mixed powder and a laser focus are converged at a position 2-30mm above a deposition substrate; the amorphous alloy powder is heated to be in a molten state through laser suspension, meanwhile, the amorphous alloy powder is blown and cooled to be in a supercooled liquid state through supersonic airflow in the process of flying to the deposition substrate, an amorphous alloy matrix is deposited on the substrate, the high-entropy alloy powder is kept not molten all the time in the process, and finally, the high-entropy alloy powder is uniformly distributed in amorphous alloy formed by deposition in a reinforced phase form; the melting point of the high-entropy alloy powder is higher than that of the amorphous alloy powder; and an amorphous alloy composite material part without size constraint can be prepared, and the material has the performance advantages of high strength and high toughness.

Description

technical field [0001] The invention belongs to the technical field of amorphous alloy preparation, and relates to a method for preparing high-entropy reinforced amorphous alloy composite materials, in particular to a novel method for preparing amorphous alloy composite materials by laser suspension melting supersonic powder airflow deposition. Background technique [0002] Amorphous alloy is a new high-performance metal material developed by modern metallurgical technology and alloy design concept. It has a series of excellent properties such as high strength, high elasticity, easy processing, corrosion resistance and soft magnetic properties. There are broad application prospects in the field of science and technology. However, the preparation of amorphous alloys requires a rapid solidification process, which has long limited the selection of amorphous alloy preparation processes and the size of amorphous alloy parts. For many years, amorphous alloy strips of micron thick...

Claims

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Application Information

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IPC IPC(8): B22F10/25B22F10/364B22F10/322B22F12/50B33Y10/00B33Y70/00B33Y80/00C22C1/04
CPCB22F10/25B22F10/364B22F10/322B22F12/50B33Y10/00B33Y70/00B33Y80/00C22C2200/02C22C45/10C22C30/00Y02P10/25
Inventor 陈冰清闫泰起孙兵兵雷杨黄帅
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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