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Tungsten/copper layered composite material, preparation method and application thereof

A composite material and copper layer technology, applied in the field of composite materials, to achieve the effect of fine grain, low sintering temperature and uniform heating

Pending Publication Date: 2022-03-18
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of the combination of tungsten / copper interface, the brittleness of tungsten material and the thermal conductivity of tungsten-copper material. By controlling the thickness of tungsten foil and copper foil, a tungsten / copper layered composite material is provided. Method and its application

Method used

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  • Tungsten/copper layered composite material, preparation method and application thereof
  • Tungsten/copper layered composite material, preparation method and application thereof
  • Tungsten/copper layered composite material, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0037] A tungsten / copper layered composite material provided in this embodiment includes two repeating units, each repeating unit includes a tungsten layer and a copper layer arranged in sequence, and the tungsten layer and the copper layer are all made of rolled metal foil slices made.

[0038] The thickness of the tungsten foil and the copper foil in this embodiment are both 100 μm. The specific preparation method is as follows:

[0039] Cutting: Manually cut the copper foil into discs with a diameter of 30mm; cut the tungsten foil into discs with a diameter of 30mm by a wire electric discharge machine.

[0040] Surface treatment: put the copper foil in 15wt% dilute hydrochloric acid, stir and oscillate to remove the oxide on the surface of the copper foil, and then ultrasonically oscillate in absolute ethanol for 10 minutes to remove impurities such as dust attached to the surface; put the tungsten foil in 2wt% hydrochloric acid In NaOH solution, heat until the solution b...

Embodiment 2

[0050]A tungsten / copper layered composite material provided in this embodiment includes two repeating units, each repeating unit includes a tungsten layer and a copper layer arranged in sequence, and the tungsten layer and the copper layer are all made of rolled metal foil slices made.

[0051] In this embodiment, the thickness of the tungsten foil is 50 μm, and the thickness of the copper foil is 100 μm. The specific preparation method is as follows:

[0052] Cutting: Manually cut the copper foil into discs with a diameter of 30mm; cut the tungsten foil into discs with a diameter of 30mm by a wire electric discharge machine.

[0053] Surface treatment: put the copper foil in 15wt% dilute hydrochloric acid, stir and oscillate to remove the oxide on the surface of the copper foil, and then ultrasonically oscillate in absolute ethanol for 10 minutes to remove impurities such as dust attached to the surface; put the tungsten foil in 2wt% hydrochloric acid In NaOH solution, heat...

Embodiment 3

[0063] A tungsten / copper layered composite material provided in this embodiment includes two repeating units, each repeating unit includes a tungsten layer and a copper layer arranged in sequence, and the tungsten layer and the copper layer are all made of rolled metal foil slices made.

[0064] In this embodiment, the thickness of the tungsten foil is 50 μm, and the thickness of the copper foil is 150 μm. The specific preparation method is as follows:

[0065] Cutting: Manually cut the copper foil into discs with a diameter of 30mm; cut the tungsten foil into discs with a diameter of 30mm by a wire electric discharge machine.

[0066] Surface treatment: put the copper foil in 15wt% dilute hydrochloric acid, stir and oscillate to remove the oxide on the surface of the copper foil, and then ultrasonically oscillate in absolute ethanol for 10 minutes to remove impurities such as dust attached to the surface; put the tungsten foil in 2wt% hydrochloric acid In NaOH solution, hea...

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Abstract

The invention relates to the technical field of composite materials, in particular to a tungsten / copper layered composite material, a preparation method and application thereof, and the method for preparing the layered composite material comprises the following steps: stacking treated tungsten sheets and copper sheets in a staggered manner, and putting the stacked tungsten sheets and copper sheets into a mold to obtain a to-be-sintered body; the vacuum degree is 10-20 Pa, the sintering temperature is 800-900 DEG C, the sintering pressure is 14-21 KN, the heating rate is 50-100 DEG C / min, heat preservation is conducted for 5-10 min, the pressurization or depressurization rate is 1 KN / min, and furnace cooling is conducted. According to the tungsten / copper layered composite material prepared according to the technical scheme, the tungsten / copper interface connection effect is good, the bonding strength is high, the highest bending strength can reach 1441 MPa, and the heat conduction performance can be adjusted by controlling the thickness of the tungsten foil and the thickness of the copper foil. The tungsten / copper layered composite material prepared by the method has a certain reference in application of plasma-oriented materials, heat sink materials and packaging materials.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a tungsten / copper layered composite material, a preparation method and an application thereof. Background technique [0002] Tungsten materials are currently the most promising plasma-facing materials (PFMs) due to their decisive advantages such as high melting point (3410 °C), good thermal conductivity (173 W / (m K)), high sputtering threshold, and low fuel retention. . Copper and its alloys have good thermodynamic properties at high temperatures so that they are used as heat sink materials. In the tokamak nuclear fusion device, the plasma-facing component (PFC) is mainly composed of these two parts. Since tungsten-copper material is a typical pseudo-alloy, the physical properties such as melting point and thermal expansion coefficient of the two are very different, and they are incompatible with each other. When subjected to heat load, the tungsten / copper connectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/20B32B38/00B32B38/16B32B37/10B32B37/06
CPCB32B15/01B32B15/20B32B38/0004B32B38/162B32B38/164B32B37/10B32B38/0008B32B37/06B32B2250/42B32B2307/302B32B2307/546B32B2553/00
Inventor 陈畅陈寅王珊罗来马吴玉程
Owner HEFEI UNIV OF TECH