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Development of sialon ceramics for lubricated sliding applications

Holzer, S.; Hantsche, J. P.; Spicher, U.; Badenheim, D.; Oberacker, R.; Hoffmann, M. J.

Microstructural design and characterization of mechanical as well as
tribological. properties of sialon ceramics are the aim of this work. A
potential application for these materials are fuel injection pumps for
gasoline engines. The currently used metal parts face severe
tribological damage with increasing pumping pressures and thus a
replacement is needed. Sialon ceramics offer a wide variety of
compositional parameters which allow to tailor microstructure and
mechanical properties in order to meet the tribological requirements.
Since phase boundaries in the sialon system shift depending on the
additive elements used, investigations of the phase relations have been
performed for two different sintering additives in order to gain
informations about reasonable starting compositions. Then, the ratio of
the sialon modifications, the amount of grain boundary phase and the
grain morphologies have been correlated with the initial composition
and the amount of sintering additives. For high hardness values an
increase of the fraction of the alpha-sialon modification in mixed
alpha/beta-sialon materials is beneficial. The fracture toughness can
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Zugehörige Institution(en) am KIT Fakultät für Maschinenbau – Institut für Keramik im Maschinenbau (IKM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2005
Sprache Englisch
Identifikator ISSN: 0933-5137
KITopen-ID: 1000007622
Erschienen in Materialwissenschaft und Werkstofftechnik
Verlag Wiley-VCH Verlag
Band 36
Heft 3-4
Seiten 117-121
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