Method for preparing nuclear functional material tungsten-tantalum alloy plate

A technology of functional materials and tantalum alloys, which is applied in the field of preparation of tungsten-tantalum alloy plates for nuclear functional materials, to achieve the effects of uniform composition, uniform structure and high density

Active Publication Date: 2012-04-18
XIAN REFRA TUNGSTEN & MOLYBDENUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no domestic manufacturer capable of mass production

Method used

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  • Method for preparing nuclear functional material tungsten-tantalum alloy plate
  • Method for preparing nuclear functional material tungsten-tantalum alloy plate
  • Method for preparing nuclear functional material tungsten-tantalum alloy plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1. Place tungsten powder (mass purity not less than 99.95%) with a Fischer average particle size of 3.0 μm and tantalum powder (mass purity not less than 99.95%) with a Fischer average particle size of 5.0 μm in a mass ratio of 9.5:0.5 In the planetary ball mill, stainless steel ball milling jars and stainless steel balls were used, absolute ethanol was used as the ball milling medium, and the vacuum degree was not greater than 0.1Pa, the ball-to-material ratio was 8:1, and the rotational speed was 150r / min. Under the conditions of high-energy ball milling for 5 hours, Tungsten and tantalum mixed powder; during the vacuum high-energy ball milling process, high-purity argon gas with a mass purity of not less than 99.99% is used as the protective atmosphere;

[0028] Step 2. Compress the tungsten-tantalum mixed powder described in step 1 with a cold isostatic press to obtain a tungsten-tantalum alloy plate green body; the pressure of the compression molding is 230 MPa...

Embodiment 2

[0033] Step 1, place tungsten powder (mass purity not less than 99.95%) with a Fischer average particle size of 6.0 μm and tantalum powder (mass purity not less than 99.95%) with a Fischer average particle size of 7.0 μm in a mass ratio of 9.5:0.5 In the planetary ball mill, stainless steel ball milling pots and stainless steel balls are used, absolute ethanol is used as the ball milling medium, vacuum high-energy ball milling is carried out for 4 hours under the conditions of a vacuum degree of not more than 0.1 Pa, a ball-to-material ratio of 8:1, and a rotational speed of 185 r / min. Obtain tungsten-tantalum mixed powder; during the vacuum high-energy ball milling process, high-purity argon with a mass purity of not less than 99.99% is used as a protective atmosphere;

[0034] Step 2. Compress the tungsten-tantalum mixed powder described in step 1 with a cold isostatic press to obtain a tungsten-tantalum alloy plate green body; the pressure of the compression molding is 150 M...

Embodiment 3

[0039] Step 1. Place tungsten powder (mass purity not less than 99.95%) with a Fischer average particle size of 8.0 μm and tantalum powder (mass purity not less than 99.95%) with a Fischer average particle size of 8.0 μm in a mass ratio of 9.5:0.5 In the planetary ball mill, a stainless steel ball mill pot and stainless steel balls are used, with absolute ethanol as the ball milling medium, vacuum high-energy ball milling for 3 hours under the conditions of a vacuum degree of not more than 0.1Pa, a ball-to-material ratio of 8:1, and a rotational speed of 225r / min. Obtain tungsten-tantalum mixed powder; during the vacuum high-energy ball milling process, high-purity argon with a mass purity of not less than 99.99% is used as a protective atmosphere;

[0040] Step 2. Compress the tungsten-tantalum mixed powder described in step 1 with a cold isostatic press to obtain a tungsten-tantalum alloy plate green body; the pressure of the compression molding is 300MPa, and the holding tim...

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Abstract

The invention discloses a method for preparing a nuclear functional material tungsten-tantalum alloy plate. The method comprises the following steps of: 1, putting tungsten powder and tantalum powder into a planetary ball mill in a mass ratio of 9.5:0.5, and performing vacuum high-energy ball milling to obtain tungsten-tantalum mixed powder; 2, pressing the tungsten-tantalum mixed powder to form a tungsten-tantalum alloy plate green blank by using a cold isostatic press; 3, sintering the tungsten-tantalum alloy plate green blank in a vacuum hot-pressing sintering furnace, and performing furnace cooling to obtain a tungsten-tantalum alloy plate blank; and 4, polishing the surface of the tungsten-tantalum alloy plate blank, and cutting the blank to obtain the nuclear functional material tungsten-tantalum alloy plate with the required size. The tungsten-tantalum alloy powder is fully utilized in the method, only a little machining is needed at the later stage, and the yield is high; the density of the prepared tungsten-tantalum alloy plate reaches over 18.76g/cm<3>, crystal grains of the alloy plate are fine and uniform, and the size of the crystal grains is less than 10.2 microns; and pollutants such as waste materials, waste acid and the like are not produced in the preparation process.

Description

technical field [0001] The invention belongs to the technical field of tungsten-tantalum alloy plate preparation, and in particular relates to a preparation method of a nuclear functional material tungsten-tantalum alloy plate. Background technique [0002] Tungsten-tantalum alloy material has many advantages such as high density, high melting point, corrosion resistance, and weldability, so it becomes the plasma-facing material in nuclear fusion reactors. [0003] The plasma-facing material is a very important material in the nuclear fusion reactor, which is related to the stability of the plasma in the reactor, the first wall structure material and the components from the plasma bombardment damage and so on. Its main functions are: ①Effectively control the impurities entering the plasma; ②Effectively transfer the heat radiated to the surface of the material; ③Prevent other components from being damaged by plasma bombardment during abnormal shutdown. During the use of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16
Inventor 郭磊侯军涛郭让民邓自南淡新国黄先明林三元
Owner XIAN REFRA TUNGSTEN & MOLYBDENUM
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