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Surface Structuring of α/β-Sialon Ceramics by Plasma-Etching

Journal Key Engineering Materials (Volume 403)
Volume SiAlONs and Non-oxides
Edited by Katsutoshi Komeya, Yi-Bing Cheng, Junichi Tatami and Mamoru Mitomo
Pages 99-102
DOI 10.4028/www.scientific.net/KEM.403.99
Citation Marco Riva et al., 2008, Key Engineering Materials, 403, 99
Online since December, 2008
Authors Marco Riva, Rainer Oberacker, Michael J. Hoffmann, Carlos Ziebert
Keywords Etching, Plasma, ß-SiAlON, Surface Structuring, Tribology
Abstract

Effects of plasma etching on mixed /-sialon ceramics with different /-ratiowere investigated. A mix of CF4/O2 in a ratio of 2:1 was chosen as reactive gas. Parameters such as etching time and the material composition were examined. It was shown that -grains exhibit a larger etching rate than the grain boundary glassy phase or the -grains, generating pockets in a range of few µm. The so created surfaces were characterized both by scanning electron microscopy (SEM) and by atomic force microscopy (AFM) in contact mode. These complementary techniques also enabled the determination of the bearing ratio.

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