An Effect of Co–W Barrier Sublayer on the Functional Characteristics of Au–Ru Contact Coatings

Gennady P. Gololobov; Dmitriy V. Suvorov; Sergey M. Karabanov; Evgeniy V. Slivkin; Alexander Tolstoguzov

doi:10.3390/coatings12020161

An Effect of Co–W Barrier Sublayer on the Functional Characteristics of Au–Ru Contact Coatings

Gennady P. Gololobov, Dmitriy V. Suvorov, Sergey M. Karabanov, Evgeniy V. Slivkin, Alexander Tolstoguzov

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Abstract

The performance characteristics (microhardness, porosity, roughness, and transient resistance) of Au–Ru coatings with and without the Co–W alloy barrier sublayer electrodeposited on the surface of contact blades of commercially produced reed switches were investigated. It was found that the barrier sublayer reduces the average roughness of the coatings without significant change in their porosity. The Au–Ru coatings without sublayer exhibited a greater variation in the transient resistance during an increase in the pressing force. The service time of reed switches with the barrier sublayer increased in both testing modes: in low-power (50 mV, 5 µA, 50 Hz) by more than 4 × 10⁶ switching cycles, and in mean-power (12 V, 0.25 A, 50 Hz) by more than 1.8 × 10⁶ switching cycles.

Original language	English
Article number	161
Number of pages	10
Journal	COATINGS
Volume	12
Issue number	2
DOIs	https://doi.org/10.3390/coatings12020161
Publication status	Published - Feb 2022

Keywords

Au–Ru coating
Co–W barrier sublayer
Electroplating
Reed switch
Switching cycle
Transient resistance

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10.3390/coatings12020161Licence: CC BY

An Effect of Co–W Barrier Sublayer on the Functional Characteristics of Au–Ru Contact CoatingsFinal published version, 3.45 MBLicence: CC BY

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title = "An Effect of Co–W Barrier Sublayer on the Functional Characteristics of Au–Ru Contact Coatings",

abstract = "The performance characteristics (microhardness, porosity, roughness, and transient resistance) of Au–Ru coatings with and without the Co–W alloy barrier sublayer electrodeposited on the surface of contact blades of commercially produced reed switches were investigated. It was found that the barrier sublayer reduces the average roughness of the coatings without significant change in their porosity. The Au–Ru coatings without sublayer exhibited a greater variation in the transient resistance during an increase in the pressing force. The service time of reed switches with the barrier sublayer increased in both testing modes: in low-power (50 mV, 5 µA, 50 Hz) by more than 4 × 106 switching cycles, and in mean-power (12 V, 0.25 A, 50 Hz) by more than 1.8 × 106 switching cycles.",

keywords = "Au–Ru coating, Co–W barrier sublayer, Electroplating, Reed switch, Switching cycle, Transient resistance",

author = "Gololobov, \{Gennady P.\} and Suvorov, \{Dmitriy V.\} and Karabanov, \{Sergey M.\} and Slivkin, \{Evgeniy V.\} and Alexander Tolstoguzov",

note = "Funding Information: This work was supported by the Ministry of Education and Science of the Russian Federation in the frame of the state assignment FSSN-2020-0003. Publisher Copyright: {\textcopyright} 2022 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2022",

month = feb,

doi = "10.3390/coatings12020161",

language = "English",

volume = "12",

journal = "COATINGS",

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AU - Gololobov, Gennady P.

AU - Suvorov, Dmitriy V.

AU - Karabanov, Sergey M.

AU - Slivkin, Evgeniy V.

AU - Tolstoguzov, Alexander

N1 - Funding Information: This work was supported by the Ministry of Education and Science of the Russian Federation in the frame of the state assignment FSSN-2020-0003. Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/2

Y1 - 2022/2

N2 - The performance characteristics (microhardness, porosity, roughness, and transient resistance) of Au–Ru coatings with and without the Co–W alloy barrier sublayer electrodeposited on the surface of contact blades of commercially produced reed switches were investigated. It was found that the barrier sublayer reduces the average roughness of the coatings without significant change in their porosity. The Au–Ru coatings without sublayer exhibited a greater variation in the transient resistance during an increase in the pressing force. The service time of reed switches with the barrier sublayer increased in both testing modes: in low-power (50 mV, 5 µA, 50 Hz) by more than 4 × 106 switching cycles, and in mean-power (12 V, 0.25 A, 50 Hz) by more than 1.8 × 106 switching cycles.

AB - The performance characteristics (microhardness, porosity, roughness, and transient resistance) of Au–Ru coatings with and without the Co–W alloy barrier sublayer electrodeposited on the surface of contact blades of commercially produced reed switches were investigated. It was found that the barrier sublayer reduces the average roughness of the coatings without significant change in their porosity. The Au–Ru coatings without sublayer exhibited a greater variation in the transient resistance during an increase in the pressing force. The service time of reed switches with the barrier sublayer increased in both testing modes: in low-power (50 mV, 5 µA, 50 Hz) by more than 4 × 106 switching cycles, and in mean-power (12 V, 0.25 A, 50 Hz) by more than 1.8 × 106 switching cycles.

KW - Au–Ru coating

KW - Co–W barrier sublayer

KW - Electroplating

KW - Reed switch

KW - Switching cycle

KW - Transient resistance

UR - https://www.scopus.com/pages/publications/85123682173

U2 - 10.3390/coatings12020161

DO - 10.3390/coatings12020161

M3 - Article

AN - SCOPUS:85123682173

SN - 2079-6412

VL - 12

JO - COATINGS

JF - COATINGS

IS - 2

M1 - 161

ER -

An Effect of Co–W Barrier Sublayer on the Functional Characteristics of Au–Ru Contact Coatings

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Keywords

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