A kind of tungsten-energy high entropy alloy composite material and its preparation method

A technology of composite materials and entropy alloys, which is applied in the field of tungsten-energy-containing high-entropy alloy composite materials and its preparation, can solve problems such as unbearable detonation loading, deterioration of mechanical properties of tungsten-zirconium alloys, and reduced energy release efficiency, etc., to achieve easy Industrialized production, improved energy release efficiency, and simple process

Active Publication Date: 2022-04-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, the interface of tungsten-zirconium alloy is easy to produce W 2 Zr intermetallic compounds, on the one hand, sharply deteriorate the mechanical properties of tungsten-zirconium alloys (no macroscopic plasticity), making it difficult to withstand detonation loading; on the other hand, they sacrifice part of the active element zirconium, thereby reducing the energy release efficiency

Method used

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  • A kind of tungsten-energy high entropy alloy composite material and its preparation method
  • A kind of tungsten-energy high entropy alloy composite material and its preparation method
  • A kind of tungsten-energy high entropy alloy composite material and its preparation method

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Embodiment 1

[0038] In Nb 17 Zr 21 Ti 62 Energetic high-entropy alloy as matrix phase and tungsten particles as reinforcement phase to prepare 50wt.%W / Nb 17 Zr 21 Ti 62 The specific steps of composite materials are as follows:

[0039] (1) Grinding with a grinding wheel to remove the oxide scales on the surface of the elemental elements Nb, Zr and Ti, then using absolute ethanol to perform ultrasonic vibration cleaning, and weighing out a clean raw material with a total mass of 2 kg according to the atomic percentage between each element;

[0040] (2) Put the weighed elemental elements into the water-cooled copper crucible of the vacuum air atomization powder making furnace, and then vacuumize until the vacuum degree in the furnace reaches 3×10 -3 Pa, filled with high-purity argon as a protective gas, and then carry out alloy melting, after the alloy is completely melted into alloy liquid, argon is used as the atomization medium, and the alloy is heated at a heating power of 160kW and...

Embodiment 2

[0045] In Nb 17 Zr 21 Ti 62 Energetic high-entropy alloy as matrix phase and tungsten particles as reinforcement phase to prepare 80wt.%W / Nb 17 Zr 21 Ti 62 The specific steps of composite materials are as follows:

[0046] (1)~(2) are identical with the steps (1)~(2) of embodiment 1;

[0047] (3) Tungsten powder with a particle size of 15 μm to 50 μm and Nb with a particle size of 45 μm to 75 μm in step (2) 17 Zr 21 Ti 62 The powder is added into the ball mill according to the mass ratio of 8:2, the ball-to-material ratio is 9:1, and the powder is mixed at a speed of 250r / min for 12h under the protection of argon to obtain a composite powder;

[0048] (4) Put the composite powder in a cold isostatic pressing mold, hold the pressure at 300MPa for 0.5h, and obtain a blank with a size of φ15mm×100mm; then place the blank in a vacuum tube furnace, under an argon atmosphere, with Heating at a heating rate of 10°C / min to 1670°C, holding the temperature for 0.5h, and cooling...

Embodiment 3

[0051] to Ti 40 V 20 Ta 35 Zr 4 Cr 1 Energetic high-entropy alloy as matrix phase and tungsten particles as reinforcement phase to prepare 93wt.%W / Ti 40 V 20 Ta 35 Zr 4 The specific steps of Cr composite material are as follows:

[0052] (1) First use a grinding wheel to remove the oxide scales on the surface of the elemental elements Ti, V, Ta, Zr and Cr, then use absolute ethanol to perform ultrasonic vibration cleaning, and weigh the total mass according to the atomic percentage of each element to be 2kg clean raw materials;

[0053] (2) Put the weighed elemental elements into the water-cooled copper crucible of the vacuum air atomization powder making furnace, and then vacuumize until the vacuum degree in the furnace reaches 3×10 -3 Pa, filled with high-purity argon as a protective gas, and then carry out alloy melting, after the alloy is completely melted into alloy liquid, argon is used as the atomization medium, the heating power is 180kW, and the atomization p...

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Abstract

The invention relates to a tungsten-energy-containing high-entropy alloy composite material and a preparation method thereof, belonging to the technical field of tungsten alloy materials. The composite material of the present invention is composed of an energetic high-entropy alloy matrix phase mainly composed of BCC structure and a tungsten reinforcement phase. The interface between the two phases is well bonded and no intermetallic compounds are formed. It has high energy release characteristics, and can adjust the density in a wide range, and has excellent comprehensive performance; in addition, the preparation process of the composite material is simple, the production efficiency is high, and it is easy for industrial production.

Description

technical field [0001] The invention relates to a tungsten-energy-containing high-entropy alloy composite material and a preparation method thereof, belonging to the technical field of tungsten alloy materials. Background technique [0002] Tungsten alloy is a composite material with metal tungsten as the reinforcing phase and NiFe, Cu, Zr or other low-melting point elements as the matrix phase. It has a series of advantages such as high density and high strength. It is widely used in gyro motor rotors and tool vibrations. Damping blocks, chopping boards and warhead materials, etc. [0003] Utilizing the high density and high strength of tungsten, combined with the high release energy of zirconium, a class of tungsten-zirconium alloys with both high strength and high release energy has been developed. In the process of penetrating the target at high speed, the tungsten-zirconium alloy can use its high strength to penetrate the target, and can also use the active element zir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/04
CPCC22C30/00C22C1/04
Inventor 梁耀健王本鹏薛云飞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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