High-temperature-resistant layered toughened tungsten-based composite material and preparation method thereof

A composite material, high temperature resistant technology, applied in the direction of metal layered products, chemical instruments and methods, lamination, etc., can solve the problems of low yield strength, high tungsten-plastic brittle transition temperature, affecting application, etc., and achieve good comprehensive performance Effect

Active Publication Date: 2018-11-23
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the plastic-brittle transition temperature of tungsten is high, its embrittlement under radiation conditions, low yield strength and easy to be oxidized at high temperature affect its application in plasma components.

Method used

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  • High-temperature-resistant layered toughened tungsten-based composite material and preparation method thereof
  • High-temperature-resistant layered toughened tungsten-based composite material and preparation method thereof
  • High-temperature-resistant layered toughened tungsten-based composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0042] A high-temperature-resistant layered toughened tungsten-based composite material provided in this embodiment includes five repeating units, each repeating unit includes a tungsten layer, a tantalum layer, a niobium layer, a tantalum layer, and a tungsten layer arranged in sequence, and adjacent The two repeating units share one tungsten layer; the tungsten layer, tantalum layer, and niobium layer are all made of rolled metal foils, and the thicknesses of the tungsten foil, tantalum foil, and niobium foil in this embodiment are all 100 um.

[0043] The high temperature-resistant layered toughened tungsten-based composite material described in this embodiment is prepared by the following method:

[0044] Surface treatment: Cut tantalum foil and niobium foil into discs with a diameter of 20 mm, place them in absolute ethanol for 10 minutes to ultrasonically vibrate, remove dust and other impurities attached to the surface, dry them in vacuum and store them in a sealed conta...

Embodiment 2

[0049] The main difference between the present embodiment and the first embodiment lies in the different thicknesses of the platinum layer and the niobium layer, and the different specific parameters of the spark plasma sintering.

[0050] In this embodiment, the thickness of the platinum layer is 95 um, and the thickness of the niobium layer is 105 um.

[0051]The spark plasma sintering process in this embodiment includes three stages: the first stage is the stage of temperature increase and pressure increase, using a stepwise temperature increase method, first from room temperature to 600°C, the temperature increase rate is 55°C / min, and then from 600°C to 600°C. To 1100°C, the heating rate is 100°C / min. At the same time, a constant rate of pressure increase is adopted. The pressure is set at 10MPa at room temperature. When the temperature reaches 1100°C, the pressure reaches 30MPa; the second stage is the heat preservation and constant pressure stage, and the time is 20min ...

Embodiment 3

[0054] The main difference between the present embodiment and the first embodiment lies in the different thicknesses of the tungsten layer and the niobium layer, and the different specific parameters of the spark plasma sintering.

[0055] In this embodiment, the thickness of the tungsten layer is 105 um, and the thickness of the niobium layer is 108 um.

[0056] In this embodiment, the spark plasma sintering process includes three stages: the first stage is the stage of temperature increase and pressure increase, using a stepwise temperature increase method, first from room temperature to 600°C, the temperature increase rate is 95°C / min, and then from 600°C to 600°C. To 1200°C, the heating rate is 100°C / min. At the same time, a constant rate of pressure increase is adopted. The set pressure at room temperature is 10MPa. When the temperature reaches 1200°C, the pressure reaches 33MPa; the second stage is the heat preservation and constant pressure stage, and the time is 10min ...

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Abstract

The invention discloses a high-temperature-resistant layered toughened tungsten-based composite material and a preparation method thereof. The tungsten-based composite material comprises a plurality of stacked repeating units, wherein each repeating unit comprises a tungsten layer, a tantalum layer, a niobium layer, a tantalum layer and a tungsten layer which are sequentially stacked, and each twoadjacent repeating units share one tungsten layer. The preparation method comprises steps of (1) surface treatment, (2) molding, (3) sintering, and (4) demolding. The tungsten-based composite material has the advantages that a niobium foil and a tantalum foil form a toughening layer, a tungsten foil is arranged on both sides of the toughening layer as a base layer, toughening layers and base layers are alternately arranged like a biological material, and the toughness of the tungsten layer composite material is superior to that of pure tungsten; the layered toughened tungsten-based compositematerial has good comprehensive performance and has important practical significance for a first wall structure of a fusion reactor.

Description

technical field [0001] The invention belongs to the technical field of structural materials, and in particular relates to a high-temperature-resistant layered toughened tungsten-based composite material and a preparation method. Background technique [0002] The high temperature and plasma materials of fusion-based power reactors are highly susceptible to degradation by exposure to the high temperature and high-energy neutron flux generated during the deuterium-tritium fusion reaction, especially fusion reactors with increased power ratings and ephemeral conditions Fusion reactors are used in a more severe environment. Therefore, fusion reactor materials need to have high melting point, high strength, and good creep resistance, and the requirements for thermal, mechanical, and physical properties of materials have reached a new level. At present, people's research on plasma and high-temperature materials has turned to refractory metals. [0003] Unique combination of vario...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B37/10B32B37/06B32B38/16
CPCB32B15/01B32B37/06B32B37/10B32B38/162B32B2307/558
Inventor 陈畅刘蕊吕品王珊钱三峰许杰钟志宏吴玉程
Owner HEFEI UNIV OF TECH
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