Preparation method for graphene-enhanced copper-niobium multi-core composite wire

A composite wire and graphene technology, applied in conductive materials, conductive materials, metal/alloy conductors, etc., can solve the problem that the material strength cannot be further improved, overcome the inability to improve mechanical properties and electrical conductivity simultaneously, and avoid agglomeration Shrinkage, accelerated metallurgical bonding effect

Active Publication Date: 2017-02-22
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Cu / Nb microscopic composite material prepared by this method has reached the processing limit, and the strength of the material cannot be further improved, and the strength is generally maintained between 800MPa and 900MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the graphene-reinforced copper-niobium multi-core composite wire in this embodiment comprises the following steps:

[0029] Step 1, uniformly mixing graphene powder, niobium powder and copper powder to obtain mixed powder; the mass percentage of graphene powder in the mixed powder is 0.5%, the mass percentage of niobium powder is 49.75%, copper powder The mass percentage content is 49.75%;

[0030] Step 2: Mix ethanol and acetone evenly at a volume ratio of 1:0.5 to obtain a mixed solution of alcohol and ketone, select polyethylene glycol as a tackifier, and add the tackifier and the mixed powder described in step 1 to the mixed solution of alcohol and ketone In the method, the addition amount of the tackifier is 0.1% of the mass of the mixed powder, and it is evenly stirred and then dried to obtain a powder, and then the powder is subjected to thermal reduction treatment at 500° C. for 5 hours under a reducing atmosphere to obtain graphene En...

Embodiment 2

[0038] The preparation method of the graphene-reinforced copper-niobium multi-core composite wire in this embodiment comprises the following steps:

[0039] Step 1, uniformly mixing graphene powder, niobium powder and copper powder to obtain mixed powder; the mass percentage of graphene powder in the mixed powder is 0.72%, the mass percentage of niobium powder is 49.64%, copper powder The mass percentage content is 49.64%;

[0040] Step 2: Mix ethanol and acetone uniformly at a volume ratio of 1:1 to obtain a mixed solution of alcohol and ketone, select polyvinyl alcohol as a tackifier, and add the tackifier and the mixed powder described in step 1 to the mixed solution of alcohol and ketone , the amount of tackifier added is 0.1% of the mass of the mixed powder, and it is dried after stirring evenly to obtain a powder, and then the powder is subjected to thermal reduction treatment at 500° C. for 5 hours under a reducing atmosphere to obtain a graphene-reinforced The niobium...

Embodiment 3

[0048] The preparation method of the graphene-reinforced copper-niobium multi-core composite wire in this embodiment comprises the following steps:

[0049] Step 1, uniformly mixing graphene powder, niobium powder and copper powder to obtain mixed powder; the mass percentage of graphene powder in the mixed powder is 1.00%, the mass percentage of niobium powder is 49.50%, copper powder The mass percentage content is 49.50%;

[0050] Step 2: Mix ethanol and acetone evenly at a volume ratio of 1:0.2 to obtain a mixed solution of alcohol and ketone, select polyethylene glycol as a tackifier, and add the tackifier and the mixed powder described in step 1 to the mixed solution of alcohol and ketone In the method, the addition amount of the tackifier is 0.1% of the mass of the mixed powder, and it is dried after stirring evenly to obtain a powder, and then the powder is subjected to thermal reduction treatment at 600° C. for 1 hour under a reducing atmosphere to obtain graphene Enha...

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Abstract

The invention provides a preparation method for a graphene-enhanced copper-niobium multi-core composite wire. The preparation method comprises the following steps: firstly, uniformly mixing graphene powder, niobium powder and copper powder to obtain mixed powder; secondly, adding a tackifier and the mixed powder into alcohol ketone mixed solution, stirring uniformly, drying to obtain a powder material, and then performing thermal reduction treatment on the powder material to obtain graphene-enhanced copper-niobium composite powder; thirdly, filling a pipe with graphene-coated copper-niobium composite powder to obtain a piped composite body; fourthly, drawing to obtain a single-core composite wire; fifthly, performing primary compounding moulding to prepare a 19-core composite wire; sixthly, performing secondary compounding moulding to prepare a 192-core composite wire; seventhly, performing tertiary compounding moulding to obtain the graphene-enhanced copper-niobium multi-core composite wire. The wire prepared by the preparation method has the characteristics of high strength, high extensibility, high conductivity and the like of the graphene, and the obstacle that the performance of a Cu/Nb material prepared by a conventional process cannot be further improved is overcome.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconductivity, and in particular relates to a preparation method of a graphene-reinforced copper-niobium multi-core composite wire. Background technique [0002] High-strength and high-conductivity copper-based composite materials are non-ferrous metal materials with excellent physical and mechanical properties. Among them, deformed copper-based composite materials are one of the research hotspots and development directions of high-strength and high-conductivity copper alloys, such as Cu / Nb / Ag, Composite materials such as Cu / Nb / Cu, Cu / Ag, Cu / Nb (winding method) and Cu / Ta have been researched and prepared one after another, and are widely used in high pulse magnetic field conductor materials, transfer switches, electrical contactors, Large current transmission wires and electromagnetic weapons, etc. With the continuous expansion of the application field of copper-based composite mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/02H01B13/00
CPCH01B1/026H01B13/00
Inventor 王鹏飞金利华梁明王耀段颖李成山张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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