2009
DOI: 10.1002/ls.72
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Nano Si3N4 composites with improved tribological properties

Abstract: Nano Si 3 N 4 composites with tailored microstructure were developed using fi ne 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 coeffi cient and wear rate was found to be signifi cantly decreased under dry sliding conditions. Add… Show more

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Cited by 22 publications
(17 citation statements)
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“…Nanostructured materials are desirable either because of their superior mechanical properties, wear resistance [153] or because of improved functional properties like thermal or electrical conductivity [154] as compared to their microcrystalline counterparts. The nanometric crystallite size directly affects the thermodynamic equilibrium phase of polymorphic materials as for instance zirconia, alumina, or titania.…”
Section: Nanostructured Materialsmentioning
confidence: 99%
“…Nanostructured materials are desirable either because of their superior mechanical properties, wear resistance [153] or because of improved functional properties like thermal or electrical conductivity [154] as compared to their microcrystalline counterparts. The nanometric crystallite size directly affects the thermodynamic equilibrium phase of polymorphic materials as for instance zirconia, alumina, or titania.…”
Section: Nanostructured Materialsmentioning
confidence: 99%
“…The performance characteristics of such products can be improved by making them from nanostructured powder materials. For example, it was demonstrated in [3,4] that mechanical characteristics (hardness, wear resistance, and durability) are higher by 30-40% in consolidated nanostructural nitride ceramics (grain size ~100 nm).…”
Section: Introductionmentioning
confidence: 99%
“…Nanocomposites generally demonstrate a cymbatic change of fracture toughness and strength with both a α/β-Si 3 N 4 polymorphous transition and a matrix grain size. An optimal combination of these properties, however, can be achieved only if a correct ratio between the size of inclusions and the size of matrix grains was established [1,3,13]. A novel approach to improve the mechanical and tribological properties of Si 3 N 4 -based composites is a modification of Si 3 N 4 -based microstructure with elongated inclusions, such as nanorods and nanowhiskers, or with titanium nitride nanoparticles [4,8,[14][15][16][17][18].…”
Section: Introductionmentioning
confidence: 99%
“…In general, the nanocrystalline ceramics win in hardness and bend strength, when the so-called "size effect" appears, but lose in fracture toughness compared to coarse grained ceramics. Nanocomposites made with non-oxide ceramic compounds exhibit extremely high hardness and wear resistance, low specific gravity, and maintain mechanical properties at high temperatures without oxidation [1][2][3][4][5][6][7][8][9][10]. Unique properties of Si 3 N 4 -based nanocomposites found an application in novel wear-resistive components, capable to withstand severe operating conditions such as cryogenic and high temperatures, boiling sea water, bases, and acids [1][2][3][4][10][11][12][13].…”
Section: Introductionmentioning
confidence: 99%