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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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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. |
format | Online Article Text |
id | pubmed-7961998 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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