ADSORPTION AND FRICTION BEHAVIOR OF MINERALS IN VACUUM

Abstract

The report presents theoretical considerations on the adsorption and friction behavior of soils under high vacuum and extreme temperature conditions. It includes an extensive literature survey, particularly in the fields of surface chemistry and physics, adsorption, and friction. The importance of using clean, reproducible surfaces for surface studies is demonstrated. The necessity of clean ultrahigh vacuum test conditions for producing and maintaining clean surfaces is emphasized. The relationship between atomic forces and surface energy and the friction and adhesion between solid surfaces is discussed. A theoretical relationship between adsorption energy and the temperature and pressure required to remove adsorbed layers is derived. The frictional behavior of quartz is considered in detail. It is concluded that significant increases in the coefficient of friction, and thereby the shear strength, of particular mineral systems will result if adsorbed contaminants are removed. However, in the absence of a mechanism for producing a large contact area, significant cohesion will not develop.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1965
Accession Number
AD0616737

Entities

People

  • Leslie G. Bromwell

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adhesion
  • Adsorption
  • Chemical Compounds
  • Chemical Synthesis
  • Chemistry
  • Civil Engineering
  • Crystal Structure
  • Engineering
  • Friction
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Phyllosilicates
  • Surface Chemistry
  • Surface Energy
  • Surface Properties

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