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Layered fiber toughened tungsten-based composite material and preparation method thereof

A composite material and fiber toughening technology, which is applied in the field of layered fiber toughened tungsten-based composite materials and its preparation, can solve the problems of low recrystallization temperature and unusable tungsten materials, etc., and achieve the effect of improving toughness

Active Publication Date: 2021-03-05
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its ductile-to-brittle transition temperature (Ductile-to-Brittle Transition Temperature, DBTT) is high, as high as about 400°C; the recrystallization temperature is low, about 1200°C; the low-temperature brittleness and recrystallization brittleness of tungsten are relatively obvious, and those with this performance defect Tungsten materials cannot be further applied in engineering

Method used

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  • Layered fiber toughened tungsten-based composite material and preparation method thereof
  • Layered fiber toughened tungsten-based composite material and preparation method thereof
  • Layered fiber toughened tungsten-based composite material and preparation method thereof

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Embodiment 1

[0048] This embodiment is used to prepare layered fiber-toughened tungsten-based composite materials, which include alternately stacked tungsten layers and toughening layers. The thickness of each tungsten layer is about 150 μm, and the thickness of each toughening layer is about 100 μm. The toughening layer includes a tungsten fiber mesh with a wire diameter of 30 μm and two layers of titanium foil with a thickness of 50 μm. Specific steps are as follows:

[0049] S1: The tungsten powder is subjected to high-energy ball milling under the protection of argon to prepare tungsten-based powder.

[0050] During the high-energy ball milling, the dry milling is carried out first, and the dry milling time is 8 hours, and then anhydrous ethanol is added for wet milling, and the wet milling time is 5 hours. The ball-to-material ratio during high-energy ball milling is 10:1, and the rotational speed of the ball milling tank is 300 r / min.

[0051] S2: Cut the titanium foil with a thickne...

Embodiment 2

[0062] The main difference between the present embodiment and the second embodiment is mainly that the wire diameter of the tungsten fiber mesh is different.

[0063] This embodiment is used to prepare layered fiber-toughened tungsten-based composite materials, which include alternately stacked tungsten layers and toughening layers. The thickness of each tungsten layer is about 150 μm, and the thickness of each toughening layer is about 100 μm. The toughening layer includes a tungsten fiber mesh with a wire diameter of 50 μm and two layers of titanium foil with a thickness of 50 μm. Specific steps are as follows:

[0064] S1: The tungsten powder is subjected to high-energy ball milling under the protection of argon to prepare tungsten-based powder.

[0065] During the high-energy ball milling, the dry milling is carried out first, and the dry milling time is 8 hours, and then anhydrous ethanol is added for wet milling, and the wet milling time is 5 hours. The ball-to-materia...

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Abstract

The invention discloses a layered fiber toughened tungsten-based composite material and a preparation method thereof. The composite material comprises a matrix layer and a toughening layer which are alternately stacked, wherein the matrix layer comprises a tungsten layer; and the toughening layer comprises titanium foil and a tungsten fiber net. Compared with pure tungsten, the layered fiber toughened tungsten-based composite material prepared according to the technical scheme provided by the invention has the advantage that the toughness can be improved by 60-80%. The layered fiber toughenedtungsten-based composite material disclosed by the invention has important practical significance for a first wall structure in a fusion reactor device.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a layered fiber toughened tungsten-based composite material and a preparation method thereof. Background technique [0002] Tungsten and its alloys are widely used in aerospace, energy, power, Microelectronics, biomedicine, mechanical processing, medical equipment, lighting, glass fiber, national defense construction and other fields. Especially in the field of high-temperature energy equipment, such as the first wall material in nuclear fusion generators, reactor splitters, accelerator beam collectors and magnetic fluid (MHD), as well as crucible materials that have certain requirements for high-temperature performance. [0003] Typical applications of tungsten (W) and its alloys, such as aerospace rockets, cutting tools for machining equipment, high-temperature pressure vessels, and nuclear fusion reactors, all have very high requirements for the compreh...

Claims

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Application Information

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IPC IPC(8): C22C47/20C22C47/14C22C49/10C22C49/14C22C111/02
CPCC22C47/14C22C47/20C22C49/10C22C49/14
Inventor 王珊谢梦雨陈畅侯旭升钟志宏吴玉程
Owner HEFEI UNIV OF TECH
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