Details

Autor(en) / Beteiligte

• Barbatti, C
• Garcia, J
• Pitonak, R
• Pinto, H
• Kostka, A
• Di Prinzio, A
• Staia, M H
• Pyzalla, A R

Titel

Influence of micro-blasting on the microstructure and residual stresses of CVD k-Al(2)O(3) coatings

Ist Teil von

• Surface & coatings technology, 2009-09, Vol.203 (24), p.3708-3717

Erscheinungsjahr

2009

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Cemented carbides coated with CVD multilayers are commonly used in metal cutting turning and milling operations. For many applications, a micro-blasting finishing procedure based on an impact treatment of the surfaces is carried out in order to smooth the coated surface and reduce sharp cutting edges. In this work, micro-blasting with corundum in aqueous solution at pressures between 0.05 and 0.3 MPa was applied to CVD TiN/Ti(C,N) /K-Al(2)O(3) multilayer coatings deposited onto cemented carbides in order to investigate its influence on the micro-topography, microstructure and residual stresses. The results showed that the micro-blasting reduces the surface roughness and affects the coating thickness. TEM investigations revealed no significant changes on the microstructure of the K-Al(2)O(3) top layer. Synchrotron X-ray investigations showed that the residual stress state of the as-deposited K-Al(2)O(3) top layer is not affected by the micro-blasting treatment under the conditions investigated.