Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings

Tungsten-copper (W–Cu) composites are widely used as electrical contact materials, resistance welding, electrical discharge machining (EDM), and plasma electrode materials due to their excellent arc erosion resistance, fusion welding resistance, high strength, and superior hardness. However, the tra...

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Autores principales: Zhao, Yuchao, Ye, Nan, Zhuo, Haiou, Wei, Chaolong, Zhou, Weiwei, Mao, Jie, Tang, Jiancheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7961998/
https://www.ncbi.nlm.nih.gov/pubmed/33807901
http://dx.doi.org/10.3390/ma14051233
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author Zhao, Yuchao
Ye, Nan
Zhuo, Haiou
Wei, Chaolong
Zhou, Weiwei
Mao, Jie
Tang, Jiancheng
author_facet Zhao, Yuchao
Ye, Nan
Zhuo, Haiou
Wei, Chaolong
Zhou, Weiwei
Mao, Jie
Tang, Jiancheng
author_sort Zhao, Yuchao
collection PubMed
description Tungsten-copper (W–Cu) composites are widely used as electrical contact materials, resistance welding, electrical discharge machining (EDM), and plasma electrode materials due to their excellent arc erosion resistance, fusion welding resistance, high strength, and superior hardness. However, the traditional preparation methods pay little attention to the compactness and microstructural uniformity of W–Cu composites. Herein, W–Cu composite coatings are prepared by pulse electroplating using nano-W powder as raw material and the influence of forward-reverse duty cycle of pulse current on the structure and mechanical properties is systematically investigated. Moreover, the densification mechanism of the W–Cu composite coating is analyzed from the viewpoints of forward-pulse plating and reverse-pulse plating. At the current density (J) of 2 A/dm(2), frequency (f) of 1500 Hz, forward duty cycle (d(f)) of 40% and reverse duty cycle (d(r)) of 10%, the W–Cu composite coating rendered a uniform microstructure and compact structure, resulting in a hardness of 127 HV and electrical conductivity of 53.7 MS/m.
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spelling pubmed-79619982021-03-17 Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings Zhao, Yuchao Ye, Nan Zhuo, Haiou Wei, Chaolong Zhou, Weiwei Mao, Jie Tang, Jiancheng Materials (Basel) Article Tungsten-copper (W–Cu) composites are widely used as electrical contact materials, resistance welding, electrical discharge machining (EDM), and plasma electrode materials due to their excellent arc erosion resistance, fusion welding resistance, high strength, and superior hardness. However, the traditional preparation methods pay little attention to the compactness and microstructural uniformity of W–Cu composites. Herein, W–Cu composite coatings are prepared by pulse electroplating using nano-W powder as raw material and the influence of forward-reverse duty cycle of pulse current on the structure and mechanical properties is systematically investigated. Moreover, the densification mechanism of the W–Cu composite coating is analyzed from the viewpoints of forward-pulse plating and reverse-pulse plating. At the current density (J) of 2 A/dm(2), frequency (f) of 1500 Hz, forward duty cycle (d(f)) of 40% and reverse duty cycle (d(r)) of 10%, the W–Cu composite coating rendered a uniform microstructure and compact structure, resulting in a hardness of 127 HV and electrical conductivity of 53.7 MS/m. MDPI 2021-03-05 /pmc/articles/PMC7961998/ /pubmed/33807901 http://dx.doi.org/10.3390/ma14051233 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Yuchao
Ye, Nan
Zhuo, Haiou
Wei, Chaolong
Zhou, Weiwei
Mao, Jie
Tang, Jiancheng
Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings
title Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings
title_full Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings
title_fullStr Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings
title_full_unstemmed Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings
title_short Influence of Pulse Current Forward-Reverse Duty Cycle on Structure and Performance of Electroplated W–Cu Composite Coatings
title_sort influence of pulse current forward-reverse duty cycle on structure and performance of electroplated w–cu composite coatings
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7961998/
https://www.ncbi.nlm.nih.gov/pubmed/33807901
http://dx.doi.org/10.3390/ma14051233
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