Asperity contacts at the nanoscale: comparison of Ru and Au

Details Asperity contacts at the nanoscale: comparison of Ru and Au Asperity contacts at the nanoscale: comparison of Ru and Au

2008-07-03

arxiv.org/abs/0807.0613v1

J. Appl. Phys. 104 (2008) p. 074320

Physics

Condensed Matter

Materials Science

10 pages, 13 figures

Scientific paper

10.1063/1.2991301

We develop and validate an interatomic potential for ruthenium based on the embedded atom method framework with the Finnis/Sinclair representation. We confirm that the new potential yields a stable hcp lattice with reasonable lattice and elastic constants and surface and stacking fault energies. We employ molecular dynamics simulations to bring two surfaces together; one flat and the other with a single asperity. We compare the process of asperity contact formation and breaking in Au and Ru, two materials currently in use in micro electro mechanical system switches. While Au is very ductile at 150 and 300 K, Ru shows considerably less plasticity at 300 and 600 K (approximately the same homologous temperature). In Au, the asperity necks down to a single atom thick bridge at separation. While similar necking occurs in Ru at 600 K, it is much more limited than in Au. On the other hand, at 300 K, Ru breaks by a much more brittle process of fracture/decohesion with limited plastic deformation.

Affiliated with

Also associated with

No associations

Rating

Asperity contacts at the nanoscale: comparison of Ru and Au does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Asperity contacts at the nanoscale: comparison of Ru and Au, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asperity contacts at the nanoscale: comparison of Ru and Au will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-116174