File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1103/PhysRevB.83.134101
- Scopus: eid_2-s2.0-79961044857
- WOS: WOS:000289053700002
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Dynamics of the contact between a ruthenium surface with a single nanoasperity and a flat ruthenium surface: Molecular dynamics simulations
Title | Dynamics of the contact between a ruthenium surface with a single nanoasperity and a flat ruthenium surface: Molecular dynamics simulations |
---|---|
Authors | |
Issue Date | 2011 |
Citation | Physical Review B - Condensed Matter and Materials Physics, 2011, v. 83, n. 13, article no. 134101 How to Cite? |
Abstract | We study the dynamics of the contact between a pair of surfaces (with properties designed to mimic ruthenium) via molecular dynamics simulations. In particular, we study the contact between a ruthenium surface with a single nanoasperity and a flat ruthenium surface. The results of such simulations suggest that contact behavior is highly variable. The goal of this study is to investigate the source and degree of this variability. We find that during compression, the behavior of the contact force displacement curves is reproducible, while during contact separation, the behavior is highly variable. Examination of the contact surfaces suggests that two separation mechanisms are in operation and give rise to this variability. One mechanism corresponds to the formation of a bridge between the two surfaces that plastically stretches as the surfaces are drawn apart and eventually separate in shear. This leads to a morphology after separation in which there are opposing asperities on the two surfaces. This plastic separation/bridge formation mechanism leads to a large work of separation. The other mechanism is a more brittle-like mode in which a crack propagates across the base of the asperity (slightly below the asperity/substrate junction) leading to most of the asperity on one surface or the other after separation and a slight depression facing this asperity on the opposing surface. This failure mode corresponds to a smaller work of separation. This failure mode corresponds to a smaller work of separation. Furthermore, contacts made from materials that exhibit predominantly brittle-like behavior will tend to require lower work of separation than those made from ductile-like contact materials. © 2011 American Physical Society. |
Persistent Identifier | http://hdl.handle.net/10722/303374 |
ISSN | 2014 Impact Factor: 3.736 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | De Oliveira, Alan Barros | - |
dc.contributor.author | Fortini, Andrea | - |
dc.contributor.author | Buldyrev, Sergey V. | - |
dc.contributor.author | Srolovitz, David | - |
dc.date.accessioned | 2021-09-15T08:25:10Z | - |
dc.date.available | 2021-09-15T08:25:10Z | - |
dc.date.issued | 2011 | - |
dc.identifier.citation | Physical Review B - Condensed Matter and Materials Physics, 2011, v. 83, n. 13, article no. 134101 | - |
dc.identifier.issn | 1098-0121 | - |
dc.identifier.uri | http://hdl.handle.net/10722/303374 | - |
dc.description.abstract | We study the dynamics of the contact between a pair of surfaces (with properties designed to mimic ruthenium) via molecular dynamics simulations. In particular, we study the contact between a ruthenium surface with a single nanoasperity and a flat ruthenium surface. The results of such simulations suggest that contact behavior is highly variable. The goal of this study is to investigate the source and degree of this variability. We find that during compression, the behavior of the contact force displacement curves is reproducible, while during contact separation, the behavior is highly variable. Examination of the contact surfaces suggests that two separation mechanisms are in operation and give rise to this variability. One mechanism corresponds to the formation of a bridge between the two surfaces that plastically stretches as the surfaces are drawn apart and eventually separate in shear. This leads to a morphology after separation in which there are opposing asperities on the two surfaces. This plastic separation/bridge formation mechanism leads to a large work of separation. The other mechanism is a more brittle-like mode in which a crack propagates across the base of the asperity (slightly below the asperity/substrate junction) leading to most of the asperity on one surface or the other after separation and a slight depression facing this asperity on the opposing surface. This failure mode corresponds to a smaller work of separation. This failure mode corresponds to a smaller work of separation. Furthermore, contacts made from materials that exhibit predominantly brittle-like behavior will tend to require lower work of separation than those made from ductile-like contact materials. © 2011 American Physical Society. | - |
dc.language | eng | - |
dc.relation.ispartof | Physical Review B - Condensed Matter and Materials Physics | - |
dc.title | Dynamics of the contact between a ruthenium surface with a single nanoasperity and a flat ruthenium surface: Molecular dynamics simulations | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1103/PhysRevB.83.134101 | - |
dc.identifier.scopus | eid_2-s2.0-79961044857 | - |
dc.identifier.volume | 83 | - |
dc.identifier.issue | 13 | - |
dc.identifier.spage | article no. 134101 | - |
dc.identifier.epage | article no. 134101 | - |
dc.identifier.eissn | 1550-235X | - |
dc.identifier.isi | WOS:000289053700002 | - |