Atomic-Scale Friction Measurements Using Friction Force Microscopy: Part II- Application to Magnetic Media

Abstract

Atomic Force/Friction Force Microscopes (AFM/FFM) were used to study tribological properties of metal-particle tapes with two roughnesses, Co gamma Fe2O3 tapes (unwiped and wiped), and unlubricated and lubricated thin-film magnetic rigid disks (as-polished and standard textured). Nanoindentation studies showed that the hardness of the tapes through the magnetic coating is not uniform. These results are consistent with the fact that the tape surface is a composite and is not homogeneous. Nanoscratch experiments performed on magnetic tapes using silicon nitride tips revealed that deformation and displacement of tape surface material occurred after one pass under light loads approx. 100 nN). A comparison between friction force profiles and the corresponding surface roughness profiles of all samples tested shows a poor correlation between localized values of friction and surface roughness.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1993
Accession Number
ADA270759

Entities

People

  • Bharat Bhushan
  • Ju-ai Ruan

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Burns
  • Ceramic Materials
  • Coatings
  • Films
  • Friction
  • Laser Beams
  • Magnetic Materials
  • Magnetic Tape
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Mechanical Engineering
  • Surface Roughness
  • Thin Films
  • Tribology

Fields of Study

  • Physics

Readers

  • Superconducting Magnet Technology
  • Thin Film Deposition Science.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).