Development and Characterization of Si3N4 Coated AlCrN Ceramic Cutting Tool

Abstract:

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Nowadays, silicon nitride based cutting tools are used to machine cast iron from the automotive industry and nickel superalloys from the aero industries. Advances in manufacturing technologies (increased cutting speeds, dry machining, etc.) induced the fast commercial growth of physical vapor deposition (PVD) coatings for cutting tools, in order to increase their life time. In this work, a new composition of the Si3N4 ceramic cutting tool was developed, characterized and subsequently coated, using a PVD process, with aluminum chromium nitride (AlCrN). The Si3N4 substrate properties were analyzed by XRD, AFM, hardness and fracture toughness. The AlCrN coating was analyzed by AFM, grazing incidence X-ray diffraction (GIXRD) and hardness. The results showed that this PVD coating could be formed homogeneously, without cracks and promoted a higher surface hardness to the insert and consequently it can produce a better wear resistance during its application on high speed machining.

Info:

Periodical:

Materials Science Forum (Volumes 660-661)

Edited by:

Lucio Salgado and Francisco Ambrozio Filho

Pages:

697-700

DOI:

10.4028/www.scientific.net/MSF.660-661.697

Citation:

J. V. C. Souza et al., "Development and Characterization of Si3N4 Coated AlCrN Ceramic Cutting Tool", Materials Science Forum, Vols. 660-661, pp. 697-700, 2010

Online since:

October 2010

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Price:

$35.00

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