Effect of normal forces on fretting corrosion of tin-coated electrical contacts

Han, Dong-Woon; Kim, Ho-Kyung

doi:10.1016/j.microrel.2017.07.048

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…where E k is the modulus of the elasticity of the socket material. Equation ( 28) can be used to calculate the elliptical contact area of a single reed contact, which is the nominal contact area, A a , in Equation (16).…”

Section: Ecr Model For Contacts Based On Variations In Socket Reed Sh...mentioning

confidence: 99%

“…Jian Song et al found that the electrical contact life of silverplated electrical connectors increased disproportionately with increasing silver-plated layer thickness in fretting wear tests [15]. Han DongWoon et al carried out fretting wear tests on tin-plated electrical contacts under different normal force and displacement amplitude conditions, suggesting that the plating was severely worn and that the normal force was linearly related to the threshold displacement amplitude [16].…”

Section: Introductionmentioning

confidence: 99%

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Research on the Influence of the Closing Amount of Electrical Connector Contacts on Fretting Wear under a Vibration Environment

et al. 2023

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As a key component for transmitting electrical signals, the electrical contact performance of electrical connectors is directly affected by the closing amount of the socket. It is urgent to explore the relationship between contact resistance and the closing amount of cylindrical groove electric connectors, as well as the range of the closing amount when their comprehensive performance is optimal in vibration environments. Based on Hertz contact theory, the long- and short-axis parameters of the contact elliptical surface were obtained using the Boussinesq solution and the contact deformation coordination equation. An electrical contact resistance (ECR) theoretical model was obtained using Holm’s electric contact theory and the GW contact model. According to the ECR and long- and short-axis parameters of the contact elliptical surface and the theoretical model of contact resistance, an ECR model based on changes in the initial closing amount (deflection) of the socket spring was established by introducing the cantilever beam model of the socket spring. Then, the failure mechanism of fretting wear and the change mechanism of the ECR of the electrical connectors under a vibration environment were analyzed using the sinusoidal vibration test of electric connectors. The optimal range of the initial closing amount of the cylindrical-groove-closing-type electrical connector socket spring was determined, providing a reference for the reliability designs of electrical connectors.

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Section: Ecr Model For Contacts Based On Variations In Socket Reed Sh...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the Influence of the Closing Amount of Electrical Connector Contacts on Fretting Wear under a Vibration Environment

et al. 2023

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“…As fretting wear proceeds, the oxide layer with a critical thickness will be delaminated and removed upon fretting, as a result allowing the normal passage of electric current in some local regions and hence having a relatively low ECR value. At the stable stage, a dynamic equilibrium of oxide development and removal has been established, as a consequence resulting in the interruption of ECR [40][41][42]. This indicates that since pure oxygen accelerates the formation of oxidation powder, the solid lubrication effect is remarkable, due to a large amount of oxidized debris produced at the contact area, and hence preventing current conveyance in the electrical contact [43].…”

Section: Microstructure Analysismentioning

confidence: 99%

Effect of different atmospheres on the electrical contact performance of electronic components under fretting wear

Liu¹,

Cai²,

Cui³

et al. 2018

J. Phys. D: Appl. Phys.

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The effects of oxide etch on the surface morphology of metals for industrial application is a common cause of electrical contacts failure, and it has becomes a more severe problem with the miniaturization of modern electronic devices. This study investigated the effects of electrical contact resistance on the contactor under three different atmospheres (oxygen, air, and nitrogen) based on 99.9% copper/pogo pins contacts through fretting experiments. The results showed the minimum and stable electrical contact resistance value when shrouded in the nitrogen environment and with high friction coefficient. The rich oxygen environment promotes the formation of cuprous oxide, thereby the electrical contact resistance increases. Scanning electron microscope microscopy and electron probe microanalysis were used to analyze the morphology and distribution of elements of the wear area, respectively. The surface product between contacts was investigated by x-ray photoelectron spectroscopy analysis to explain the different electrical contact properties of the three tested samples during fretting.

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“…Malucci simulated the contact performance by considering the combined effects of surface degradation and interface motion on the change of contact resistance, and proposed a third level multi-spot constriction model [5,6]. Han and Kim studied the effect of normal forces on fretting corrosion in tin-coated electrical contacts, and found that there is a linear relationship between the normal forces and the threshold displacement amplitude [7]. Park and Lee developed an empirical equation to account for the impact of fretting frequency or temperature, and proposed failure-time variation sensitivity for each variable [8].…”

mentioning

confidence: 99%

A Cost-Effective Solution to Improving the Electrical Performance of Metal Contacting Interfaces in IC System under Temperature-Humidity Environment

Meng

Shi

et al. 2019

Applied Sciences

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Temperature-humidity (TH) induced failure mechanism (FM) of metal contacting interfaces in integrated circuit (IC) systems has played a significant role in system reliability issues. This paper focuses on central processing unit (CPU)/motherboard interfaces and studies several factors that are believed to have a great impact on TH performance. They include: Enabling load, surface finish quality, and contacting area. Test vehicles (TVs) of Clarkdale package and of Ibex peak motherboard were designed to measure low level contact resistance (LLCR) for catching any failure. Several sets of design of experiments (DOE) were conducted on 85°C/85% relative humidity and test results were analyzed. A proposal that correlates asperity spots and contact tip design with contact resistance was proposed and thus a cost-effective solution for improving electrical performance under TH was deduced. The proposal has proven to be reasonably effective in practice.

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Effect of normal forces on fretting corrosion of tin-coated electrical contacts

Cited by 10 publications

References 9 publications

Research on the Influence of the Closing Amount of Electrical Connector Contacts on Fretting Wear under a Vibration Environment

Research on the Influence of the Closing Amount of Electrical Connector Contacts on Fretting Wear under a Vibration Environment

Effect of different atmospheres on the electrical contact performance of electronic components under fretting wear

A Cost-Effective Solution to Improving the Electrical Performance of Metal Contacting Interfaces in IC System under Temperature-Humidity Environment

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