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

Method for preparing micrometer porous metal copper blocks by dealloying of copper-ferrum alloy

A technology of dealloying, copper-iron alloy, applied in the field of porous metal materials, can solve the problems of low strength, difficult to block nanoporous metal copper, and low specific surface area of ​​large-pore porous metal, and achieve low cost and positive engineering application value. , the effect of controllable porosity

Active Publication Date: 2016-06-08
WUHAN UNIV OF TECH
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: for the shortcomings of the large-pore porous metal prepared by the existing traditional foaming method that the specific surface area is too low and the difficulty of bulking and low strength of the nano-porous metal copper prepared by the dealloying method Insufficient and defective, provide a kind of copper-iron alloy adopts the method for preparing micron porous metal copper material by dealloying method, so that porous metal copper block can be prepared, and has higher mechanical strength

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 micrometer porous metal copper blocks by dealloying of copper-ferrum alloy
  • Method for preparing micrometer porous metal copper blocks by dealloying of copper-ferrum alloy
  • Method for preparing micrometer porous metal copper blocks by dealloying of copper-ferrum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The 1 μm copper powder with a purity of ≥99.0% and the 6 μm iron powder with a purity of 99.5% are weighed at an atomic ratio of 25:75, and the element powder is ball milled on a light low-energy ball mill at a speed of 240 rpm for 24 hours to make the composite powder Mix evenly; the composite powder is sintered in PAS (plasma activated sintering) under low pressure vacuum hot pressing, the vacuum degree is ≤10Pa, the sintering temperature is 800°C, the heating rate is 50°C / min, the holding time is 5min, and the sintering pressure is 50MPa. Cu-Fe alloy bulk; the preparation concentration is 5wt% H 2 SO 4 solution, put the clean Cu-Fe alloy into H 2 SO 4 solution, and the container was placed in a water bath and heated to 90°C to keep it warm. Record time. Observe the reaction bubbles of the active metal iron and the sulfuric acid solution in the container, and find that there are no more bubbles in the solution after 15 hours, then take out the metal block and wash...

Embodiment 2

[0039] The 1 μm copper powder with a purity of ≥99.0% and the 6 μm iron powder with a purity of 99.5% are weighed at an atomic ratio of 25:75, and the element powder is ball milled on a light low-energy ball mill at a speed of 240 rpm for 24 hours to make the composite powder Mix evenly; the composite powder is sintered in PAS (plasma activated sintering) under low pressure vacuum hot pressing, the vacuum degree is ≤10Pa, the sintering temperature is 600°C, the heating rate is 50°C / min, the holding time is 5min, and the sintering pressure is 50MPa. Cu-Fe alloy bulk; the preparation concentration is 5wt% H 2 SO 4 solution, put the clean Cu-Fe alloy into H 2 SO 4 solution, and the container was placed in a water bath and heated to 90°C to keep it warm. Record time. Observe the reaction bubbles of the active metal iron and the sulfuric acid solution in the container, and find that there are no more bubbles in the solution after 15 hours, then take out the metal block and wash...

Embodiment 3

[0041] The 1 μm copper powder with a purity of ≥99.0% and the 6 μm iron powder with a purity of 99.5% are weighed at an atomic ratio of 25:75, and the element powder is ball milled on a light low-energy ball mill at a speed of 240 rpm for 24 hours to make the composite powder Mix evenly; the composite powder is sintered in PAS (plasma activated sintering) under low pressure vacuum hot pressing, the vacuum degree is ≤10Pa, the sintering temperature is 1000°C, the heating rate is 50°C / min, the holding time is 10min, and the sintering pressure is 50MPa, and the obtained Cu-Fe alloy bulk; the preparation concentration is 5wt% H 2 SO 4 solution, put the clean Cu-Fe alloy into H 2 SO 4 solution, and the container was placed in a water bath and heated to 90°C to keep it warm. Record time. Observe the reaction bubbles of active metal iron and sulfuric acid solution in the container, and find that there are no more bubbles in the solution after 24 hours, then take out the metal blo...

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
Pore size distributionaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing micrometer porous metal copper blocks by dealloying of copper-ferrum alloy. According to the method, plasma is adopted to activate and sinter copper-ferrum alloy, and then ferrum in the alloy is selectively corroded by utilizing a chemical dealloying method, thus obtaining porous copper blocks with high-strength micrometer apertures. According to the invention, by utilizing the characteristic that the copper-ferrum inter-atom diffusing capacity can be greatly reduced by a quick sintering process of hard miscibility of copper-ferrum alloy, which is lower than the melting point of ferrum, the dimension of a ferrous phase after sintering approaches to the particle size of micron-size material powder, so as to prepare the copper-ferrum bi-continuous three-dimensional net structured copper-ferrum alloy; the particle size of adopted copper powder is slightly smaller than that of ferrous powder, so as to form a structure that copper particles wrap ferrous particles, thus being favorable for ensuring the uniformity of aperture after corrosion; the pore structures of the porous metal copper blocks are regulated and controlled by changing the ferrous powder content and the particle size distribution; according to the process, the high-strength micrometer porous copper blocks with uniform pore distribution and adjustable pore size and porosity can be obtained; and the method has the advantages of being simple in process, low in cost and strong in practicability.

Description

technical field [0001] The invention belongs to the technical field of porous metal materials, and in particular relates to a method for preparing a micron porous metallic copper block by dealloying copper-iron alloys. Background technique [0002] Porous metal has the characteristics of low relative density, high specific strength, large specific surface area, strong permeability, and good energy absorption. It is a multifunctional material integrating mechanical, thermal, acoustic, and electrical properties. Therefore, porous metals have abundant application fields, such as shock absorbers, filters, heat dissipation media, catalyst supports, sensors, etc. There are many preparation methods for porous metals, and the more attractive preparation methods currently include melt foaming method, template method, electrochemical deposition method and so on. The template method uses the filterable material as a template, mixes it with metal powder and sinters or mixes it with liq...

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
IPC IPC(8): C22C3/00B22F3/11
CPCB22F3/114B22F2998/10C22C3/00B22F1/0003B22F3/105
Inventor 沈强邹丽杰陈习陈斐李俊国张联盟
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