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Preparation method of high-density fine-grain W-TiC alloy material

An alloy material and fine-grained technology, which is applied in the field of preparation of high-density fine-grained W-TiC alloy materials, can solve the problems of unsatisfactory material performance, low material density, and difficulty in sintering densification, etc., and achieve fast heating speed , Short sintering time, avoid serious effect of grain growth

Active Publication Date: 2015-07-01
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high melting point of tungsten, if the conventional powder metallurgy method is used to prepare tungsten alloy materials, it will lead to difficulty in sintering and densification, thereby reducing the density of the material; and in a long-term high-temperature sintering environment, the grain growth will be serious. Material properties cannot meet the actual needs of PFM materials for thermonuclear fusion

Method used

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  • Preparation method of high-density fine-grain W-TiC alloy material
  • Preparation method of high-density fine-grain W-TiC alloy material
  • Preparation method of high-density fine-grain W-TiC alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation of the W-TiC alloy material of this embodiment:

[0030] Step 1. Using the method of wet high-energy ball milling, mix W powder with mass purity not less than 99.9% and average particle size not greater than 2 μm and TiC powder with mass purity not less than 99.9% and average particle size not greater than 100 nm by ball milling. The specific process is as follows:

[0031] Step 101. Weigh 3g of TiC powder and 2997g W powder, then take by weighing 7500g absolute ethanol according to solid-liquid ratio 1: 2.5;

[0032] Step 102, add 3g of TiC powder, 299.7g of W powder and 7500g of absolute ethanol into a high-energy ball mill, and ball mill for 30 hours at a speed of 3000r / min;

[0033] Step 103, adding 1498.5 g of W powder into a high-energy ball mill, and ball milling for 30 hours at a speed of 3000 r / min;

[0034] Step 104, add the remaining 1198.8g of W powder into the high-energy ball mill, and ball mill for 88 hours at a speed of 3000r / min;

[0...

Embodiment 2

[0040] The preparation of the W-TiC alloy material of this embodiment:

[0041] Step 1. Using the method of wet high-energy ball milling, mix W powder with mass purity not less than 99.9% and average particle size not greater than 2 μm and TiC powder with mass purity not less than 99.9% and average particle size not greater than 100 nm by ball milling. The specific process is as follows:

[0042] Step 101. Weigh 15g of TiC powder and 2985g W powder, then take by weighing 6000g acetone according to solid-liquid ratio 1: 2;

[0043] Step 102, adding 15g of TiC powder, 298.5g of W powder and 6000g of acetone into a high-energy ball mill, and ball milling for 36 hours at a speed of 2500r / min;

[0044] Step 103, adding 1492.5 g of W powder into a high-energy ball mill, and ball milling for 36 hours at a speed of 2500 r / min;

[0045] Step 104, adding the remaining 1194g of W powder into the high-energy ball mill, and ball milling for 120h at a speed of 2500r / min;

[0046] Then pl...

Embodiment 3

[0051] The preparation of the W-TiC alloy material of this embodiment:

[0052] Step 1. Using the method of wet high-energy ball milling, mix W powder with mass purity not less than 99.9% and average particle size not greater than 2 μm and TiC powder with mass purity not less than 99.9% and average particle size not greater than 100 nm by ball milling. The specific process is as follows:

[0053] Step 101. Weigh 30g TiC powder and 2970g W powder, then weigh 9000g of absolute ethanol according to the solid-to-liquid ratio of 1:3;

[0054] Step 102, add 30g of TiC powder, 297g of W powder and 9000g of absolute ethanol into a high-energy ball mill, and ball mill for 24 hours at a speed of 3500r / min;

[0055] Step 103, adding 1485g of W powder into a high-energy ball mill, and ball milling for 24 hours at a speed of 3500r / min;

[0056] Step 104, adding the remaining 1188g of W powder into the high-energy ball mill, and ball milling for 76 hours at a speed of 3500r / min;

[0057]...

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Abstract

The invention provides a preparation method of a high-density fine-grain W-TiC alloy material, which comprises the following steps: 1. uniformly mixing TiC powder and W powder by a wet high-energy ball milling process, and carrying out vacuum drying to obtain mixed powder; 2. carrying out discharge plasma sintering on the mixed powder to obtain a sintered blank; and 3. carrying out multiple die forging on the sintered blank to obtain the high-density fine-grain W-TiC alloy material. The high-density fine-grain W-TiC alloy material comprises the following components in percentage by mass: 0.1-1% of TiC and the balance of W. The relative density of the W-TiC alloy material prepared by the method is not less than 99.5%, and the average grain size is not greater than 10 mu m; and thus, the W-TiC alloy material satisfies the requirements for PFM materials for thermonuclear fusion and the like in special aspects, and can be widely used as a plasma material faced with a diverter in a thermonuclear fusion reactor.

Description

technical field [0001] The invention belongs to the technical field of tungsten alloy materials, and in particular relates to a preparation method of a high-density fine-grained W-TiC alloy material. Background technique [0002] Tungsten alloy is widely considered to be the most promising nuclear fusion device due to its advantages of high melting point, excellent thermal conductivity, low sputtering yield and high self-sputtering threshold, low vapor pressure and low tritium retention performance. Plasma-Facing Material (PFM). PFM refers to the materials in the device that face the plasma directly, these materials are constantly bombarded by various particles (deuterium, tritium, helium, neutrons, impurity particles) from the plasma, high thermal load deposition, transient high energy impact, And the complex effects of electromagnetic radiation and electromagnetic force. These effects will cause the radiation effect and damage of the material, lead to the generation, mig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/04C22C1/05C22F1/18
Inventor 李增峰汤慧萍向长淑黄愿平张晗亮刘海彦汪强兵李红宝石英
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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