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Testing the feasibility of new ceramic cutting tools - a case study on experimental and numerical evaluation of geometry and machining techniques

: Renz, A.; Kailer, A.; Koplin, C.

Bucko, M.M. ; European Ceramic Society:
11th international conference of the European Ceramic Society 2009. Proceedings. CD-ROM : Krakow, 21 - 25 June 2009
ISBN: 978-83-609-5854-4
European Ceramic Society (ECERS International Conference and Exhibition) <11, 2009, Krakow>
Conference Paper
Fraunhofer IWM ()
cutting tool; ceramic; stress; wear

"Production and machining of ceramic cutting edges are crucial for the performance of the final cutting tool as well as its geometry, since the edge is subjected to very high loads and wear. The region where two near-surface layers overlap to form the cutting edge is highly interesting in terms of grinding damage, residual stress and resulting wear behaviour mechanical as well as chemical. Sharp cutting edges were machined out of two ceramic materials (SiC-whisker reinforced alumina and SiAlON), whereas different machining parameters were applied. The resulting edges were investigated by optical microscopy and SEM for the evaluation of surface quality. Grinding damage is accompanied by near-surface residual stress, which is measured by Raman and fluorescence peak shift analysis. Furtherm ore, changes in the material caused by various tribological wear mechanisms were investigated. This allows the evaluation of the grinding process and machining parameters for the two ceramics as well as an estimation of feasibility of the materials applicability as sharp edged cutting tools. The forces acting on the edge are analysed by calculating the loading stress using the finite element method on tool geometry. "