Based on 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 analyzed theoretically by using a linear fracture mechanics. Based on 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. The wear mode map using Sc and μ show the possible region of flake formation. The wear mode map using Sc* and μ show the possible regions of powder formation and ploughing. Experimental results of several ceramics under different experimental conditions agree well with the above wear mode maps for ceramics.
|Number of pages||6|
|Journal||Wear of Materials: International Conference on Wear of Materials|
|Publication status||Published - 1991|
|Event||International Conference on Wear of Materials - Orlando, FL, USA|
Duration: 1991 Apr 7 → 1991 Apr 11
ASJC Scopus subject areas
- Mechanics of Materials