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A spherical copper-coated tungsten composite powder, its preparation method and its use

A composite powder and copper-coated technology, applied in the field of copper-tungsten composite powder, spherical copper-coated tungsten composite powder, and preparation, can solve the problems of poor composition uniformity, complex process, cumbersome steps, etc.

Active Publication Date: 2017-09-15
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems existing in the process of preparing tungsten-copper composite powder in the prior art, such as poor composition uniformity, complex process, cumbersome steps, high preparation cost, and difficulty in large-scale production, the present invention provides a spherical copper-coated Tungsten composite powder and its preparation method

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  • A spherical copper-coated tungsten composite powder, its preparation method and its use
  • A spherical copper-coated tungsten composite powder, its preparation method and its use
  • A spherical copper-coated tungsten composite powder, its preparation method and its use

Examples

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Effect test

Embodiment 1

[0095] Example 1: Intermittent electroplating of copper-coated tungsten composite powder with pyrophosphate bath

[0096] (1) Common tungsten powder with an average particle size of 5-20 μm (such as figure 1 As shown) is spheroidized by radio frequency plasma spheroidization device, the main process parameters are: central gas (argon) flow rate 20-30L / min, side gas (argon gas) flow rate 90-120L / min, carrier gas (argon gas) The flow rate is 3.5L / min, the feeding rate is 5-10g / min, the reaction chamber pressure is 60-80KPa, and the operating power is 60-70KW. (2) the tungsten powder (such as figure 2 with image 3 shown) into the pyrophosphate copper plating solution, wherein the plating solution includes: copper pyrophosphate 60g / L, potassium pyrophosphate 320g / L, triammonium citrate 15g / L, potassium sodium tartrate 20g / L, ammonia water 3ml / L. Use citric acid and potassium hydroxide to adjust the pH value of the pyrophosphate copper plating solution to 8.3 to 8.5, and adj...

Embodiment 2

[0097] Example 2: Intermittent electroplating of copper-coated tungsten composite powder with pyrophosphate bath

[0098] (1) Ordinary tungsten powder with an average particle size of 1-10 μm is spheroidized by a radio frequency plasma spheroidization device. The main process parameters are: central gas (argon) flow rate 25-35L / min, edge gas (argon) The flow rate is 120-140L / min, the carrier gas (argon) flow rate is 4.5L / min, the feeding rate is 10-25g / min, the reaction chamber pressure is 90-100KPa, and the operating power is 40-60KW. (2) Join the tungsten powder processed through spheroidization in step (1) in the pyrophosphate copper plating bath, wherein the plating bath includes: copper pyrophosphate 60g / L, potassium pyrophosphate 320g / L, ammonium citrate 25g / L, ammonia water 3ml / L. Potassium hydroxide is used to adjust the pH value of the pyrophosphate copper plating solution to 8.5 to 8.8, and the temperature of the pyrophosphate copper plating solution is adjusted to...

Embodiment 3

[0099] Example 3: Intermittent electroplating of copper-coated tungsten composite powder with pyrophosphate bath

[0100] (1) Ordinary tungsten powder with an average particle size of 5-15 μm is spheroidized by a radio frequency plasma spheroidization device. The main process parameters are: central gas (argon) flow rate 20-30L / min, edge gas (argon) The flow rate is 90-120L / min, the carrier gas (argon) flow rate is 5L / min, the feeding rate is 5-10g / min, the reaction chamber pressure is 50-70KPa, and the operating power is 30-60KW. (2) Add the tungsten powder treated by spheroidization in the step (1) to the pyrophosphate copper plating bath, wherein the plating bath includes: copper pyrophosphate 60g / L, potassium pyrophosphate 320g / L, ammonium citrate 15g / L, potassium sodium tartrate 20g / L, ammonia water 2ml / L. Use citric acid and potassium hydroxide to adjust the pH value of the pyrophosphate copper plating solution to 8.0 to 8.4, and adjust the temperature of the pyrophosp...

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Abstract

The invention relates to a spherical copper-coated tungsten composite powder, a preparation method and its application. The copper-coated tungsten composite powder has a core-shell structure, the outer shell is copper plating, the inner core is tungsten powder, and the copper-coated tungsten composite powder The mass ratio of tungsten element and copper element in the body is 5-95:95-5; it has the characteristics of good dispersion, good fluidity, uniform composition and high purity. The preparation method is as follows: ordinary tungsten powder is treated with plasma spheroidization technology, and then copper is uniformly deposited on the surface of the tungsten powder by intermittent electroplating process, and the copper-plated composite powder is cleaned and dried. The present invention prepares spherical copper-coated tungsten composite powder through the combination of plasma spheroidization and intermittent electroplating. Improving the comprehensive performance of tungsten-copper composite materials has broad application prospects and can be used for industrial mass production.

Description

technical field [0001] The invention belongs to the technical field of materials and electroplating, and relates to a copper-tungsten composite powder, in particular to a spherical copper-coated tungsten composite powder, a preparation method and an application thereof. Background technique [0002] W-Cu composite material is a composite material composed of tungsten with high melting point and low thermal expansion coefficient and copper with high electrical conductivity and thermal conductivity. It has high density, high strength, high hardness and good ductility, good electrical conductivity and Thermal conductivity, low thermal expansion coefficient and other characteristics. Therefore, it can be widely used in various industries such as aerospace, national defense and military industry, electronic information, metallurgy and mechanical processing, and occupies a very important position in the national economy. [0003] With the development of modern science and technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02C25D3/38C25D7/00
Inventor 李建强吴鹏周张健马炳倩
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI