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

A kind of preparation method of fiber structure molybdenum copper composite material

A fiber structure and composite material technology, applied in the field of metallurgy, can solve the problems of reducing thermal conductivity and electrical conductivity of alloys, uneven pore distribution, small difference in specific gravity, etc., and achieves a high degree of densification, a large composition range, and a dense and uniform structure. Effect

Inactive Publication Date: 2015-12-09
SHANGHAI UNIV OF ENG SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this technology is that the dimensional accuracy of the product is improved, and the air tightness is improved. The disadvantage is that new elements are introduced during the activation process, which reduces the thermal conductivity and electrical conductivity of the alloy.
[0006] In addition, there is a process of suppression in the above two methods
Due to molybdenum, copper (molybdenum: 10.22g / cm 3 , Copper: 8.93g / cm 3 ) has a small difference in specific gravity, forming is difficult, and the product is prone to problems such as uneven distribution of pores and difficulty in complete densification.

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
  • A kind of preparation method of fiber structure molybdenum copper composite material
  • A kind of preparation method of fiber structure molybdenum copper composite material
  • A kind of preparation method of fiber structure molybdenum copper composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take a fiber-structured molybdenum-copper composite material as an example, the composition and content of which are 80wt% molybdenum and 20wt% copper. The diameter of the molybdenum fiber is 20 μm, the purity is ≥99.9%, and the copper is T2 copper.

[0029] The preparation process comprises the following steps:

[0030] (1) The molybdenum fiber is laid and stacked to make a moderately fluffy two-dimensional fiber mat, and the porosity of the fiber mat is 80%;

[0031] (2) The fiber mat is molded and pressed to obtain a three-dimensional fiber preform, and the pressing pressure is controlled within the range of 20-50MPa. At this time, the porosity of the fiber preform is 23%~34%;

[0032] (3) Place the copper ingot and the molybdenum fiber preform together on the ZrO 2 In the sintering boat, copper is placed on the molybdenum fiber preform;

[0033] (4) Place the sintered boat in a vacuum environment, and keep the vacuum at 1×10 -3 Above Pa, the heating rate is 3~11...

Embodiment 2

[0036] A fibrous structure molybdenum-copper composite material, taking the composition and content of molybdenum 85wt% and copper 15wt% as an example. The diameter of the molybdenum fiber is 30 μm, the purity is ≥99.9%, and the copper is T2 copper.

[0037] The preparation process comprises the following steps:

[0038] (1) The molybdenum fiber is laid and stacked to make a moderately fluffy two-dimensional fiber mat, and the porosity of the fiber mat is 75%;

[0039] (2) The fiber mat is molded and pressed to obtain a three-dimensional fiber preform, and the pressing pressure is controlled within the range of 50-80MPa. At this time, the porosity of the fiber preform is 15% to 22%;

[0040] (3) Place the copper ingot and the molybdenum fiber preform together on the ZrO 2 In the sintering boat, copper is placed on the molybdenum fiber preform;

[0041] (4) Place the sintered boat in a vacuum environment, and keep the vacuum at 1×10 -3 Above Pa, the heating rate is 3~11°C / m...

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
diameteraaaaaaaaaa
porosityaaaaaaaaaa
porosityaaaaaaaaaa
Login to View More

Abstract

The invention relates to molybdenum copper composite materials with fiber structures and a method for preparing the molybdenum copper composite materials with the fiber structures. The composite materials are compact and even in organization structure and have an obvious fiber structure characteristic, and the composite materials comprise, by weight, 55%-90% of molybdenum and the balance copper. The preparation method comprises the steps that molybdenum fibers are made into a properly-fluffy two-dimensional fiber mat in a laying, folding and matching mode; mould pressing is carried out on the two-dimensional fiber mat to obtain a three-dimensional fiber precast body in a pressing mode, and pressing pressure is controlled between 20-80MPa; copper ingots and the molybdenum fiber precast body are placed in a ZrO2 sintering boat together, copper is arranged on the molybdenum fiber precast body, in a vacuum environment, the vacuum degree is maintained above 1*10-3Pa, the temperature is maintained below 1180 DEG C-1350 DEG C, and heat is preserved for 0.5h-2h; the copper ingots and the precast body are cooled to be below 160 DEG C in a furnace cooling mode and are taken out of the furnace, abundant copper on the surfaces of obtained molybdenum-copper billets is removed, and the molybdenum copper composite materials with the fiber structures are obtained.

Description

technical field [0001] The invention belongs to the field of metallurgy technology, and relates to a preparation process of composite materials, in particular to a molybdenum-copper composite material with dense and uniform fiber structure, adjustable molybdenum content and a wide range, and a preparation method thereof. Background technique [0002] Molybdenum-copper composite material is a special functional material formed by uniformly mixing two monomers of molybdenum and copper. It combines the intrinsic physical properties of molybdenum and copper, and has good properties such as anti-welding, burning resistance, high-temperature strength, and high electrical and thermal conductivity, so it is widely used in electronics, electric power, military and other fields. [0003] The two elements of molybdenum and copper are neither miscible nor form intermetallic compounds. Therefore, molybdenum-copper composite materials are prepared by conventional powder metallurgy process...

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): C22C47/06C22C47/08C22C49/02C22C111/02
Inventor 王婕丽林文松
Owner SHANGHAI UNIV OF ENG SCI
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