Wednesday, 13 October 2004 - 1:00 PM

This presentation is part of : Failure of Ceramics and Ceramic Composites

A New Scratch Resistance Measure for Structural Ceramics

Ghatu Subhash, Michigan Technological University, Michigan Technological University, ME-EM Department, Houghton, MI 49931

Scratch resistance of seven structural ceramics was investigated using a conical diamond tool in an instrumented rotating scratch facility. The normal (thrust) and the tangential (cutting) forces induced during the scratch process were recorded using high-speed force transducers. The volume of material removed and the complete scratch groove characteristics were analyzed using laser profilometry and scanning electron microscopy. Based on the volume of material removed in a given scratch groove, material properties, and the measured forces, a “scratch resistance measure” that reflects the susceptibility of a ceramic to scratching induced damage was developed. This measure is expected to assist in the ranking of ceramics for their resistance to scratching. The ranking of the ceramics was later confirmed by extensive microscopic analysis of the induced scratch features on all the ceramics. The implications of these results for applications in machining, wear behavior and abrasion resistance will also be presented.

Back to Failure of Ceramics and Ceramic Composites
Back to SES Abstracts

Back to The 41st Annual SES Technical Meeting