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Nano Si 3 N 4 composites with improved tribological properties
Author(s) -
Schulz Ingrid,
Herrmann Mathias,
Endler Ingolf,
Zalite Ilmars,
Speisser Bruno,
Kreusser Johannes
Publication year - 2009
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.72
Subject(s) - materials science , tribology , composite material , microstructure , nano , tin , dry friction , fracture toughness , friction coefficient , toughness , coefficient of friction , slip (aerodynamics) , metallurgy , physics , thermodynamics
Nano Si 3 N 4 composites with tailored microstructure were developed using fine ß‐Si 3 N 4 powders. Their wear behaviour was investigated. Whereas pure Si 3 N 4 composites showed improved wear behaviour under dry rolling conditions with slip, TiN‐reinforced nano Si 3 N 4 composites generate a self‐lubricating behaviour under dry sliding conditions. After chemical treatment with hydrogen sulphide, the friction coefficient and wear rate was found to be significantly decreased under dry sliding conditions. Additionally, the new composites possess higher fracture toughness than the pure nano Si 3 N 4 materials. Copyright © 2009 John Wiley & Sons, Ltd.