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Method for preparing high-entropy amorphous micro-laminated composite material

A composite material and micro-lamination technology, applied in the directions of additive manufacturing, additive processing, energy efficiency improvement, etc., can solve the problems of brittleness of amorphous alloys, improve the plastic toughness of materials, excellent composite effect, and solve the brittleness of amorphous alloys. Effect

Active Publication Date: 2022-01-28
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

[0004]There is no relevant literature report on the use of high-entropy alloys to provide high plasticity as a tough layer to solve the problem of brittleness of amorphous alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Fe-Cr-Y-Ta-B amorphous alloy prefabricated powder and Fe-Cr-Co-Ni-Mn-Si high-entropy alloy prefabricated powder were respectively loaded into the feeding port of the dual-channel powder feeding device, and the powder particle size was 70-100 μm, and the thickness of the high-entropy alloy layer and the amorphous alloy layer is 50-80 μm. Concrete preparation steps are as follows:

[0043] 1. Adjust the amount of amorphous alloy powder supply and gas pressure. Firstly, the gas is turned on, and the gas flow path is determined according to the shape of the trajectory formed by the amorphous alloy gas flow, and then the laser is turned on to determine the relative positions of the gas flow, the laser beam and the substrate. The distance between the laser focus and the substrate is 18mm; laser power: 300W.

[0044] 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 are ...

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Abstract

The invention belongs to the technical field of composite material preparation, and relates to a method for preparing a high-entropy amorphous micro-laminated composite material, according to the method, amorphous alloy powder and high-entropy alloy powder with high toughness are loaded into a double-channel supersonic airflow powder feeding device, the amorphous alloy powder is Fe-Cr-Y-Ta-B alloy powder, and the high-entropy alloy powder is Fe-Cr-Co-Ni-Mn-Si alloy powder; a vertical distance between a laser focus and a substrate is 16-30 mm, and the laser power is 250-550 W; and process parameters are adjusted, the two kinds of powder are alternately sent out through airflow with supersonic speed, and finally the high-entropy amorphous micro-laminated composite material is formed. According to the invention, a special construction method of the micro-laminated composite material is adopted, so that the composite material can be toughened by utilizing various favorable characteristics of an interface due to a large number of interfaces in the composite material while the advantageous properties of high strength of an amorphous alloy and high toughness of a high-entropy alloy are integrated, and the comprehensive properties of the composite material are further improved.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and relates to a method for preparing a high-entropy amorphous micro-laminated composite material, in particular to a method for preparing a composite material by laser suspension and melting supersonic powder gas flow deposition. Background technique [0002] As a new type of alloy, amorphous alloys are different from traditional crystal materials in that they have a microstructure of long-range disorder and short-range order, and have the advantages of high strength, high hardness, high wear resistance, and good corrosion resistance. However, amorphous alloys are relatively brittle, which limits their application. At the same time, the preparation of bulk amorphous alloys is difficult, and the critical size of bulk amorphous alloys is difficult to increase. Especially iron-based amorphous alloys have very high strength and hardness, but due to the limitation of their bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/25B22F10/364B22F10/322B33Y10/00B33Y70/00B33Y80/00B22F10/38B22F12/55B22F10/50
CPCB22F10/25B22F10/364B22F10/322B33Y10/00B33Y70/00B33Y80/00B22F10/38B22F12/55B22F10/50C22C2200/02C22C30/00Y02P10/25
Inventor 陈冰清闫泰起刘伟孙兵兵雷杨
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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