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

Preparation method of carbon-doped reinforced w-cu composite material

A composite material, w-cu technology, applied in the direction of coating, etc., can solve the problem of reducing the thermal resistance of the interface, and achieve the effect of high density, simple and easy process, and controllable process

Active Publication Date: 2016-08-17
WUHAN UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the results of domestic and foreign patents and literatures that have been consulted, it has not been adopted to add a certain amount of carbon element at the tungsten-copper interface: using the viscosity and pyrolysis process of organic additives, the carbon element is coated on the tungsten powder in a certain area. On the surface, in the process of vacuum hot-pressing sintering, W and C react to form in-situ WC, thereby improving the sinterability between W and Cu and reducing the interface thermal resistance; then the C@W composite powder is coated twice To obtain Cu@C@W composite powder, after hot pressing and sintering process, it is possible to obtain W-Cu composite material with ideal Cu network structure, thermal conductivity exceeding 225W / mK, and the highest reaching 287.5W / mK

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
  • Preparation method of carbon-doped reinforced w-cu composite material
  • Preparation method of carbon-doped reinforced w-cu composite material
  • Preparation method of carbon-doped reinforced w-cu composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Mix raw material W powder and organic additives in alcohol solvent according to mass percentage W powder: organic additives = 100: 1 (the amount of organic matter added is 1wt.%), and the particle size of W powder is 10 μm. The coated W powder is placed in an inert atmosphere for high temperature treatment to obtain a C@W composite powder. Then, Cu@C@W composite powders were prepared using the C@W composite powders as raw materials by electroless plating. Then the Cu@C@W composite powder is subjected to cold isostatic pressing at 400MPa to obtain a green body, and finally put into a vacuum hot-press furnace, and sintered according to the specified sintering process. The sintering process is 950°C-100MPa-2h, specifically , the temperature was raised to 950°C, the temperature was kept at 950°C for 2h, the sintering pressure was 100MPa, and the temperature was naturally lowered with the furnace to obtain a dense W-Cu composite material.

[0032] The process of carbon dopi...

Embodiment 2

[0037] Mix raw material W powder and organic additives in alcohol solvent according to mass percentage W powder: organic additives = 20: 1 (the amount of organic matter added is 5wt.%), and the particle size of W powder is 10 μm. The coated W powder is placed in an inert atmosphere for high temperature treatment to obtain a C@W composite powder. Then, Cu@C@W composite powders were prepared using the C@W composite powders as raw materials by electroless plating. Then the Cu@C@W composite powder is cold isostatically pressed at 500MPa to obtain the green body, and finally placed in a vacuum hot-press furnace, and sintered according to the specified sintering process. The sintering process is 1000℃-100MPa-2h, specifically , heated up to 1000°C, kept at 1000°C for 2h, sintered at a pressure of 100MPa, and cooled naturally with the furnace to obtain a dense W-Cu composite material.

[0038] The process of carbon doping with organic matter is as follows: the organic additive is PVB...

Embodiment 3

[0043] Mix raw material W powder and organic additive in alcohol solvent according to the mass percentage W powder: organic additive = 13.33: 1 (the amount of organic matter added is 7.5wt.%), and the particle size of W powder is 5 μm. After mixing The coated W powder was placed in an inert atmosphere for high temperature treatment to obtain a C@W composite powder. Then, Cu@C@W composite powders were prepared using the C@W composite powders as raw materials by electroless plating. Then the Cu@C@W composite powder is cold isostatically pressed at 400MPa to obtain the green body, and finally placed in a vacuum hot-press furnace, and sintered according to the specified sintering process. The sintering process is 950°C-100MPa-2h, specifically , the temperature was raised to 950°C, the temperature was kept at 950°C for 2h, the sintering pressure was 100MPa, and the temperature was naturally lowered with the furnace to obtain a dense W-Cu composite material.

[0044] The process of...

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 preparation method of the carbon-doped reinforced W-Cu composite material of the present invention is a preparation method based on organic matter-doped carbon-doped reinforced W-Cu composite material. A layer of organic additives, the coated W powder is placed in an inert atmosphere for high temperature treatment to pyrolyze the organic additives to obtain a C@W composite powder; then use the C@W composite powder as a raw material to pass the coating method The Cu@C@W composite powder is prepared; then the Cu@C@W composite powder is subjected to cold isostatic pressing at 100-500MPa to obtain a green body, and finally the green body is put into a vacuum hot-press furnace for sintering to obtain a carbon-doped Reinforced W‑Cu composites. The invention can obtain high-density carbon-doped reinforced W-Cu composite material, and has the advantages of low W-Cu two-phase interface thermal resistance, strong interface bonding force, high thermal conductivity, and the like.

Description

technical field [0001] The invention relates to the field of tungsten-copper composite materials, in particular to a method for preparing a carbon-doped reinforced tungsten-copper composite material for thermal use. The rate is greater than 225W / mK. Background technique [0002] W-Cu composite material is a material composed of two-phase monomers composed of W and Cu that are neither miscible nor form intermetallic compounds, and are generally called W-Cu pseudo-alloys. High density has always been considered as the prerequisite for the excellent performance of W-Cu composite materials. In recent years, many researchers have developed new preparation methods such as mechanical alloying method, nano powder method and activation sintering method to obtain high-density W-Cu composite materials. -Cu composite material. However, in mechanical alloying and nano-powder method, with the continuous refinement of W and Cu grains, the grain boundaries between W-Cu will also increase ...

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 Patents(China)
IPC IPC(8): C22C1/05B22F1/02C23C18/40
Inventor 罗国强代洋张联盟沈强李美娟王传彬陈斐
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