Surface multi-scale structure tungsten material and preparation method of material

A multi-scale, tungsten block technology, applied in the field of metal surface treatment, can solve the problems of enhanced electron scattering, decreased thermal conductivity, sacrifice of pure tungsten thermal conductivity, etc., to achieve less destructive, uniform force, and interlayer bonding good effect

Active Publication Date: 2019-03-01
PANZHIHUA UNIV
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Problems solved by technology

But the disadvantage is that the thermal conductivity of pure tungsten is sacrificed. The phase boundary in W-ZrC alloy increases the mechanical properties and also enhances the scattering of electrons, and its thermal conductivity is significantly lower than that of pure tungsten.
This method is mainly suitable for copper, iron, nickel, titanium and other metals and alloy materials with good plasticity, and there are still many shortcomings in the treatment of tungsten materials.

Method used

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  • Surface multi-scale structure tungsten material and preparation method of material
  • Surface multi-scale structure tungsten material and preparation method of material
  • Surface multi-scale structure tungsten material and preparation method of material

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preparation example Construction

[0030] Preferably, the preparation method of the material comprises: dry rubbing the surface of the tungsten block with a grinding ball at a constant temperature of 200-500° C. for 10-60 minutes to prepare a tungsten block with a multi-scale structure on the surface.

[0031] Preferably, the grinding balls are alumina balls.

[0032] Preferably, the positive pressure and friction linear velocity of the dry grinding are respectively 10-50N and 0.1-0.6m / s.

[0033] Preferably, the preparation method of the material further includes: grinding and polishing the surface of the tungsten block before dry grinding, degreasing with acetone, ultrasonic cleaning, and drying.

[0034] In order to solve the second technical problem of the present invention, the preparation method of the surface multi-scale structure tungsten material described in the present invention comprises:

[0035] Dry rubbing the surface of the tungsten block with grinding balls at a constant temperature of 200-500...

Embodiment 1

[0039] The specific steps for preparing the surface multi-scale structure tungsten material with a total layer thickness of 50 microns are:

[0040]Step 1: Polish the surface of the rolled tungsten block with P400, 800, 1500, and 2000 silicon carbide sandpaper in sequence, and then use polishing cloth and W2.5, W1 and W0.5 diamond abrasive paste to polish it finely. Use acetone to wash the residual organic matter on the polished tungsten surface, then put it into an ultrasonic machine to clean it until the surface is smooth and clean, and finally take out the tungsten block and dry it for use.

[0041] Step 2: Place the tungsten block processed in step 1 in the sample chamber of the high-temperature friction testing machine, fix and ensure that the surface is flush with the horizontal plane. The temperature of the sample chamber was raised to 500°C with a heating rate of 150°C / min. The grinding beads are alumina balls, and the positive pressure and friction linear velocity ar...

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Abstract

The invention relates to a surface multi-scale structure tungsten material and a preparation method of the material, and belongs to the technical field of metal surface treatment. A gradient layer isarranged between the surface structure of the surface multi-scale structure tungsten material and the matrix structure, the grain size of the gradient layer is changed in a gradient mode, and the gradient layer from the surface structure to the matrix structure sequentially comprises a nano-layer, a sub-micron layer and a micro-layer, wherein the grain sizes of the nano-layer, the sub-micron layerand the micron layer are in a nanometer level, a sub-micron level and a micron level respectively. According to the surface multi-scale structure tungsten material, binding between the scale layers is good, no obvious interface exists, and micro-cracking, delamination and other phenomena are avoided. The method is easy and quick to use and suitable for preparing bulk samples.

Description

technical field [0001] The invention relates to a surface multi-scale structure tungsten material and a preparation method thereof, belonging to the technical field of metal surface treatment. Background technique [0002] The service environment of the plasma-facing components of the fusion reactor is extremely harsh, and the materials in it are required to resist the damage effects caused by high heat load and strong radiation for a long time, so as to ensure the long-term stable operation of the fusion reactor. Tungsten is the metal material with the highest melting point, and has high thermal conductivity and low sputtering rate. It is considered to be one of the most potential materials that can be applied to plasma-facing components. However, the biggest disadvantage of tungsten is its obvious room temperature brittleness (even for rolled commercial grade tungsten, the ductile-brittle transition temperature DBTT is between 200°C and 300°C), radiation embrittlement, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00C22C27/04
CPCB24B1/00C22C27/04
Inventor 蒋燕
Owner PANZHIHUA UNIV
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