Understanding Metal/Metal Electrical Contact Conductance from the Atomic to Continuum Scales

Irving, Douglas L.

doi:10.1002/9780470890905.ch4

Cited by 2 publications

(3 citation statements)

References 88 publications

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“…The bending and bunching of the current lines to flow through the point of contact also led to a higher current density in the vicinity of the contact. The increased current density resulted in the same peak temperature predicted by equation ( 1), but with a heating rate and a spatial distribution of the peak temperature that depended on the size of the Ohmic contact [33,34,37]. Figure 5(b) illustrates the temperature profile for these systems.…”

Section: Resultsmentioning

confidence: 71%

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Impact of Joule heating, roughness, and contaminants on the relative hardness of polycrystalline gold

Freeze

Kingon

et al. 2013

J. Phys.: Condens. Matter

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Asperities play a central role in the mechanical and electrical properties of contacting surfaces. Changes in trends of uniaxial compression of an asperity tip in contact with a polycrystalline substrate as a function of substrate geometry, compressive stress and applied voltage are investigated here by implementation of a coupled continuum and atomistic approach. Surprisingly, an unmodified Au polycrystalline substrate is found to be softer than one containing a void for conditions of high stress and an applied voltage of 0.2 V. This is explained in terms of the temperature distribution and weakening of Au as a function of temperature. The findings in this communication are important to the design of materials for electrical contacts because applied conditions may play a role in reversing relative hardness of the materials for conditions experienced during operation.

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Section: Resultsmentioning

confidence: 71%

“…It should be noted that the rate of heating and the temperature distribution were also sensitive to the geometry of the Ohmic contact [33,34]. The multi-scale method also enabled the extension of the length scale beyond that of the atomistic simulation by treating Au as continuum.…”

Section: Methodsmentioning

confidence: 99%

Impact of Joule heating, roughness, and contaminants on the relative hardness of polycrystalline gold

Freeze

Kingon

et al. 2013

J. Phys.: Condens. Matter

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“…A very good summary of electrical conductance from the atomic to continuum scales can be found in [78]. Electrical contact resistance resulting from a low number of contact points and low contact area constricts the electron flow near the asperities actually in contact [79].…”

Section: Electrical Contactmentioning

confidence: 99%

If holm had used a Scanning Tunneling Microscope: What the nanoscientists are teaching us about electrical contacts

Dorsey

2015

2015 IEEE 61st Holm Conference on Electrical Contacts (Holm)

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The invention in the 1980s of the Atomic Force and the Scanning Tunneling Microscopes and widespread use of these and other tools since then has led to an explosion in research into the characterization of contact interfaces at the atomic and molecular level, i.e., on the nanoscale. This paper reviews this research and points to areas where this nanoscale research has a significant impact of our understanding of electrical contacts. Areas of consideration include lubrication, surface films, contact resistance, adhesion, and friction.

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Understanding Metal/Metal Electrical Contact Conductance from the Atomic to Continuum Scales

Cited by 2 publications

References 88 publications

Impact of Joule heating, roughness, and contaminants on the relative hardness of polycrystalline gold

Impact of Joule heating, roughness, and contaminants on the relative hardness of polycrystalline gold

If holm had used a Scanning Tunneling Microscope: What the nanoscientists are teaching us about electrical contacts

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