A kind of preparation method of nano W-xcu alloy, nano W-xcu alloy

An alloy and nanotechnology, applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of complicated operation, reduced product quality, uneven mixing of raw materials, etc.

Inactive Publication Date: 2021-10-08
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods for preparing nano-tungsten copper powder mainly include mechanical alloying, spray drying, etc. Among them, mechanical alloying is easy to introduce impurities, and spray drying will lead to uneven particle size distribution of the product. The disadvantages of these methods directly affect the subsequent The process of the process reduces the quality of the product, therefore, seriously restricts its application in industrial production
[0004] The Chinese invention patent with publication number CN101850420A discloses a preparation method of tungsten-coated copper nanocomposite powder with controllable coating layer thickness. In this method, copper tungstate and copper oxide powder are uniformly mixed through a planetary ball mill to prepare tungsten Copper alloy, but the use of a ball mill for mixing will make the raw materials mixed unevenly, the operation is complicated, and it is easy to introduce impurities, and the obtained tungsten-copper alloy has a rough particle size

Method used

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  • A kind of preparation method of nano W-xcu alloy, nano W-xcu alloy
  • A kind of preparation method of nano W-xcu alloy, nano W-xcu alloy
  • A kind of preparation method of nano W-xcu alloy, nano W-xcu alloy

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Embodiment 1

[0037] The preparation method of nanometer W-70Cu alloy in the present embodiment, comprises the following steps:

[0038] 1) Take 31.14g of CuWO 4 Mix with 1000mL ammonia water to get CuWO 4 solution;

[0039] 2) Add 45.74g of CuO to the solution, using NH 3 ·H 2 O adjusts the pH to 6.5 to obtain a mixture system;

[0040] 3) Transfer the mixture system to a polytetrafluoroethylene-lined hydrothermal reaction kettle, place it in a drying oven at 150°C for 15 hours, then take it out and cool it at room temperature to obtain a hydrothermal product;

[0041] 4) Put the hydrothermal product in the funnel, slowly add water into the funnel, wash with water for 3 times by suction filtration; then add ethanol for suction filtration and wash 3 times; then dry at 70°C for 5 hours to obtain nano-sized tungsten-copper precursor powder;

[0042] 5) Place the nanoscale tungsten copper precursor powder in the reduction furnace with a flow rate of 1m 3 / h of hydrogen, heat up to 400°C ...

Embodiment 2

[0046] The preparation method of the nano W-65Cu alloy with controllable copper content in the present embodiment comprises the following steps:

[0047] 1) Take 31.14g of CuWO 4 Mix with 1000mL ammonia water to get CuWO 4 solution;

[0048] 2) Add 34.71 g of CuO to the solution, using NH 3 ·H 2 O adjusts the pH to 7 to obtain a mixture system;

[0049] 3) Transfer the mixture system to a polytetrafluoroethylene-lined hydrothermal reaction kettle, place it in a drying oven at 175°C for 18 hours, then take it out and cool it at room temperature to obtain a hydrothermal product;

[0050] 4) Put the hydrothermal product in the funnel, slowly add water into the funnel, wash with water for 4 times by suction filtration; then add ethanol for suction filtration and wash 3 times; then dry at 80°C for 7 hours to obtain nano-sized tungsten-copper precursor powder;

[0051] 5) Place the nanoscale tungsten copper precursor powder in the reduction furnace with a flow rate of 3m 3 / h of...

Embodiment 3

[0054] The preparation method of nanometer W-60Cu alloy in the present embodiment, comprises the steps:

[0055] 1) Take 31.14g of CuWO 4 Mix with 1000mL ammonia water to get CuWO 4 solution;

[0056] 2) Add 26.56g of CuO to the solution, using NH 3 ·H 2 O adjusts the pH to 7.5 to obtain a mixture system;

[0057] 3) Transfer the mixture system to a polytetrafluoroethylene-lined hydrothermal reaction kettle, place it in a drying oven at 200°C for 20 hours, then take it out and cool it at room temperature to obtain a hydrothermal product;

[0058] 4) Put the hydrothermal product in the funnel, slowly add water into the funnel, wash with water for 5 times by suction filtration; then add ethanol for suction filtration and wash 3 times; then dry at 90°C for 10 hours to obtain nano-sized tungsten-copper precursor powder;

[0059] 5) Place the nanoscale tungsten copper precursor powder in the reduction furnace with a flow rate of 5m 3 / h of hydrogen, heat up to 500°C at a heat...

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Abstract

The invention discloses a preparation method of a nano-W-xCu alloy and a nano-W-xCu alloy, belonging to the technical field of preparing composite materials by powder metallurgy. The method is to put copper tungstate and a certain amount of copper oxide into a high-pressure hydrothermal kettle for hydrothermal reaction, then cool the obtained hydrothermal product, filter and clean it, and finally dry it to obtain nano-sized tungsten copper. Precursor powder, followed by two-stage hydrogen reduction to obtain the final product nano-W‑xCu alloy powder. The method uses hydrothermal reaction to prepare tungsten-copper alloy powder, which has the advantages of high efficiency, low consumption, and easy operation. The prepared nano W-xCu alloy powder is spherical, the particle size reaches nanometer level, and the particles are fine and uniform. Tungsten copper is evenly distributed.

Description

technical field [0001] The invention relates to a preparation method of a nanometer W-xCu alloy and a nanometer W-xCu alloy, belonging to the technical field of preparing composite materials by powder metallurgy. Background technique [0002] Tungsten-copper alloy combines the excellent characteristics of W and Cu, and has the advantages of high temperature resistance, ablation resistance, high thermal conductivity, low thermal expansion coefficient and certain plasticity. It has been widely used in electrical contact materials and thermal deposition materials in recent years. , EDM materials, high temperature structural materials. Studies have shown that the refinement of tungsten-copper composite powder and the homogenization of components can improve its sintering performance. [0003] At present, the methods for preparing nano-tungsten copper powder mainly include mechanical alloying, spray drying, etc. Among them, mechanical alloying is easy to introduce impurities, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/22B22F1/00C22C9/00B82Y30/00B82Y40/00
CPCC22C9/00B82Y30/00B82Y40/00B22F9/22B22F1/054B22F1/065
Inventor 李继文单康宁赵清王喜然魏世忠张国赏徐流杰潘昆明
Owner HENAN UNIV OF SCI & TECH
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