Effect of Grain Refinement on the Comprehensive Mechanical Performance of W–Cu Composites

Han, Tielong; Hou, Chao; Sun, Yaochuan; Li, Yurong; Song, Xiaoyan

doi:10.3390/nano13030386

Cited by 5 publications

(5 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Existing processes for the preparation of copper-based contact materials include: induced copper powder fusion infiltration, pre-sintered tungsten skeleton fusion infiltration, activation sintering, high-temperature liquid-phase sintering, vacuum sintering, and injection molding sintering. The microstructures of CuW composites produced under different process conditions are very different, and their comprehensive properties are therefore significantly different [4][5][6][7].…”

Section: Preparation Process Of Cuw/graphene-enhanced Cuw Composites ...mentioning

confidence: 99%

“…Copper-tungsten (CuW) composites, as a prototypical two-phase pseudo-alloy, integrate the high conductivity and thermal conductivity of copper with the exceptional strength and arc ablation resistance of tungsten. Owing to these advantageous characteristics, CuW composites, especially CuW80 (80 wt.% W content), are extensively utilized as electrical contacts in high-voltage circuit breakers [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Liu,

Han,

Jia

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

To address the issue of over-standard short-circuit currents in a power system, it is imperative to enhance the comprehensive performance of the electrical contacts, which serve as the lynchpin of circuit breakers, so as to improve the breaking capacity of high-voltage circuit breakers. Graphene, as the most prominent two-dimensional carbon material in recent years, has garnered widespread applications across various fields. In this study, graphene-enhanced CuW composites for high-voltage circuit breaker electrical contacts were prepared innovatively using integrated vacuum infiltration technology. The innovative graphene-enhanced CuW composites significantly improved the mechanical, electrical, and ablation resistance properties, and have been successfully applied in the 252 kV/63 kA high-voltage SF6 circuit breakers, achieving 20 times effective consecutive full-capacity short-circuit current breaking. It provides a new route for the development and application of high-performance CuW electrical contacts. Looking ahead, it is planned to extend their application to higher voltage grade high-voltage circuit breakers.

show abstract

Section: Preparation Process Of Cuw/graphene-enhanced Cuw Composites ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Liu,

Han,

Jia

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…For W-Cu composites, the strengthening phase is mainly distributed in the grain boundary of W or W/Cu phase boundary, [149] and the strengthening effect is mainly achieved by the pinning [140] Copyright 2023, Open Access. 40.…”

Section: Distribution Of Dispersion Strengthening Phasementioning

confidence: 99%

“…[ 139 ] Han et al investigated the wear behavior and high‐temperature deformation behavior of the UFG W–Cu composite. [ 140 ] It was found that grain refinement enhanced the resistance against plastic deformation, leading to a reduced thickness of mechanical mixing layer and debris size in the UFG W–Cu composite. In addition, the high‐temperature strength of UFG W–Cu composite was largely improved due to the grain refinement and enhanced blocking effect of W phase on dislocations.…”

Section: Strengthening Mechanismsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in W–Cu Composites: A Review on the Fabrication, Application, Property, Densification, and Strengthening Mechanism

Zhang,

Yang,

Huang

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

Tungsten–copper (W–Cu) composite is a pseudoalloy prepared by powder metallurgy method with tungsten and copper as the main components, which are widely used in electrical contacts, electrical discharge machining electrodes, electronic packaging, aerospace, and military fields due to its good conductivity, thermal conductivity, high melting point, high electrical breakdown strength, low contact resistance, high welding resistance, and high heat resistance. Herein, the recent advances of W–Cu composites are reviewed systematically. First, the preparative techniques of W–Cu composites are introduced in detail, and their advantages and disadvantages are evaluated objectively. Second, an introduction of the main application fields and corresponding characteristics advantages for W–Cu composites are provided. Subsequently, the densification techniques and strengthening mechanisms and their effects on microstructure, mechanical properties, and physical properties of W–Cu composites are mainly discussed. Finally, based on a comprehensive review of W–Cu composites, its future development trends and potential research challenges are summarized and prospected.

show abstract

Microstructure and tribological performances of W-Cu-Co-xWC alloys with various WC amounts

Tang,

Cheng,

Chen

et al. 2024

Tungsten

View full text Add to dashboard Cite

Effect of Grain Refinement on the Comprehensive Mechanical Performance of W–Cu Composites

Cited by 5 publications

References 44 publications

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Recent Advances in W–Cu Composites: A Review on the Fabrication, Application, Property, Densification, and Strengthening Mechanism

Microstructure and tribological performances of W-Cu-Co-xWC alloys with various WC amounts

Contact Info

Product

Resources

About