Wear mode map of ceramics

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53 Citations (Scopus)

Abstract

On the basis of in situ observations of wear processes in a scanning electron microscope, the mechanical wear mechanisms for ceramics are classified into three microscopic wear modes: flake formation, powder formation and ploughing. The condition for the occurrence of each wear mode is analysed theoretically using linear fracture mechanics. On the basis of this analysis, two wear mode maps for ceramics are introduced by using the dimensionless parameters Sc, Sc* and the coefficient of friction μ, where Sc is a function of maximum hertzian contact pressure, maximum surface roughness and fracture toughness and Sc* is a function of hardness, maximum surface roughness and fracture toughness. The wear mode map using Sc and μ shows the possible region of flake formation. The wear mode map using Sc* and μ shows the possible regions of powder formation and ploughing. Experimental results for several ceramics under different experimental conditions agree well with the above wear mode maps for ceramics.

Original languageEnglish
Pages (from-to)219-228
Number of pages10
JournalWEAR
Volume151
Issue number2
DOIs
Publication statusPublished - 1991 Dec 20
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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