Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing compact W-Cu composite material at low temperature

A composite material, dense technology, applied in the field of low-temperature preparation of dense W-Cu composite materials, to achieve the effect of precise control of composition, high degree of consistency, and low energy consumption

Active Publication Date: 2011-04-27
WUHAN UNIV OF TECH
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to the results of domestic and foreign patents and literatures, there is no report on the preparation of dense W-Cu composite materials by vacuum hot pressing at low temperature (significantly lower than the melting point of copper) by adding Zn powder to W-Cu.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing compact W-Cu composite material at low temperature
  • Method for preparing compact W-Cu composite material at low temperature
  • Method for preparing compact W-Cu composite material at low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The volume ratio of W powder and Cu powder is according to W: Cu=10:90%, and Zn is added to account for 0.5% of the total mass fraction of W-Cu, and the particle size of W is 5 μm, and the particle size of Cu is 20 μm. Then put it into a vacuum hot pressing furnace, and carry out vacuum hot pressing sintering according to the specified vacuum hot pressing sintering process. The sintering process is 700°C-200MPa-4h. Previously, the heating rate was 10°C / min, 600°C~650°C heating rate was 5°C / min, 650°C~700°C heating rate was 2°C / min, kept at 700°C for 4 hours, and cooled naturally to obtain a dense W-Cu composite Material.

[0025] The measured density of the W-Cu composite material is 9.63g / cm 3 , the density reaches 97.5%. The phase analysis results of the composite material are as follows: figure 2 As shown, it can be seen from the figure that there are only two phases of W and Cu in the main phase; the microstructure is as follows image 3 As shown, the W-Cu comp...

Embodiment 2

[0027] The volume ratio of W powder and Cu powder is W:Cu=75:25%, and Zn is added to account for 2.0% of the total mass fraction of W-Cu. Then put it into a vacuum hot pressing furnace, and carry out vacuum hot pressing sintering according to the specified vacuum hot pressing sintering process. The sintering process is 900°C-80MPa-1h. Previously, the heating rate was 10°C / min, the heating rate was 5°C / min at 800°C~850°C, and the heating rate was 2°C / min at 850°C~900°C, kept at 900°C for 1 hour, and cooled naturally to obtain a dense W-Cu composite Material.

[0028] The measured density of the W-Cu composite material is 15.94g / cm 3 , the density reaches 97.8%. The phase analysis results of the composite material are as follows: figure 2 As shown, it can be seen from the figure that there are only two phases of W and Cu in the main phase; the microstructure is as follows Figure 4 As shown, the W-Cu composite material is compact as a whole, and W and Cu are evenly distribu...

Embodiment 3

[0030] The volume ratio of W powder and Cu powder is according to W:Cu=60:40vol%, and Zn is added to account for 2.0% of the total mass fraction of W-Cu. Then put it into a vacuum hot pressing furnace, and carry out vacuum hot pressing sintering according to the specified vacuum hot pressing sintering process. The sintering process is 850°C-80MPa-3h. Previously, the heating rate was 10°C / min, 750°C~800°C heating rate was 5°C / min, 850°C~850°C heating rate was 2°C / min, kept at 850°C for 3 hours, and cooled naturally to obtain a dense W-Cu composite Material.

[0031] The measured density of the W-Cu composite material is 14.45g / cm 3 , the density reaches 97.39%. The phase analysis results of the composite material are as follows: figure 2 shown, from figure 2 It can be seen that the main phase is only W and Cu two phases; the microstructure is as follows Figure 5 As shown, the W-Cu composite material is compact as a whole, and W and Cu are evenly distributed.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a compact W-Cu composite material at low temperature, comprising the following steps: carrying out three-dimensional mixing on W power, Cu power and Zn power, wherein the volume fraction ratio of W power to Cu power is (10.0-75.0%): (25.0-90.0%) by volume, and the Zn power is 0.5-2.0% of the total mass of the W power and the Cu power and serves as additive; putting the mixture in a vacuum hot pressing furnace; and carrying out hot pressing sintering on the mixture according to the specified vacuum hot pressing sintering process to obtain the compact W-Cu composite material, wherein the vacuum degree is 1*10<-3>-1*10<-4>Pa, the sintering temperature is 700-900 DEG C, the heat preservation time is 1-4 hours and the applied pressure is 80-200 Mpa in the specified vacuum hot pressing sintering process. The mixture can be sintered at low temperature to obtain the high-compactness W-Cu composite material, and the method has the obvious advantages of simple process, low cost, wide and accurate component adjustment range, and the like.

Description

technical field [0001] The invention relates to the field of W-Cu composite materials, in particular to a low-temperature preparation method of dense W-Cu composite materials. Background technique [0002] The W-Cu material system is an immiscible two-phase composite material composed of metal W with high melting point and high hardness and metal Cu with high plasticity and high conductivity. W has a high melting point, low thermal expansion coefficient, high strength, and Cu has good thermal conductivity and electrical conductivity. Therefore, combining the excellent characteristics of W and Cu, W-Cu composite materials have high temperature resistance strength, high electrical and thermal conductivity, and good thermal conductivity. Excellent electrical corrosion resistance, high hardness, low thermal expansion coefficient and certain plasticity, etc., and through the change of its composition ratio, the corresponding mechanical and physical properties can be controlled an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C27/04C22C1/04
Inventor 沈强陈平安罗国强张联盟王传彬李美娟刘书萍
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com