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Universal aspects of brittle fracture, adhesion, and atomic force microscopyThis universal relation between binding energy and interatomic separation was originally discovered for adhesion at bimetallic interfaces involving the simple metals Al, Zn, Mg, and Na. It is shown here that the same universal relation extends to adhesion at transition-metal interfaces. Adhesive energies have been computed for the low-index interfaces of Al, Ni, Cu, Ag, Fe, and W, using the equivalent-crystal theory (ECT) and keeping the atoms in each semiinfinite slab fixed rigidly in their equilibrium positions. These adhesive energy curves can be scaled onto each other and onto the universal adhesion curve. The effect of tip shape on the adhesive forces in the atomic-force microscope (AFM) is studied by computing energies and forces using the ECT. While the details of the energy-distance and force-distance curves are sensitive to tip shape, all of these curves can be scaled onto the universal adhesion curve.
Document ID
19900026966
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Banerjea, Amitava
(NASA Lewis Research Center Cleveland, OH, United States)
Ferrante, John
(NASA Lewis Research Center Cleveland, OH, United States)
Smith, John R.
(GM Research Laboratories Warren, MI, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Chemistry And Materials (General)
Meeting Information
Meeting: New Materials Approaches to Tribology: Theory and Applications Symposium
Location: Boston, MA
Country: United States
Start Date: November 29, 1988
End Date: December 2, 1988
Sponsors: USAF, NSF, U.S. Army
Accession Number
90A14021
Distribution Limits
Public
Copyright
Other

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