Superplastic deformation of Si3N4 based nanocomposites reinforced by nanowhiskers

Superplastic deformation of Si3N4 based nanocomposites reinforced by nanowhiskers

A superplastic deformation of pre-sintered Si3N4-based nanocrystalline ceramics and Si3N4 nano-whisker reinforced composites has been investigated. Superplastic deformation tests have been carried out in the temperature range from 1500 to 1600°C under 56kN compression in nitrogen. During the tests,...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2014-06, Vol.606, p.144-149
Hauptverfasser: Zgalat-Lozynskyy, O., Andrzejczuk, M., Varchenko, V., Herrmann, M., Ragulya, A., Polotai, A.
Format: Artikel
Sprache:eng
Schlagworte:
Anisotropy
Applied sciences
Contact of materials. Friction. Wear
Diamond pyramid hardness
Elasticity. Plasticity
Exact sciences and technology
Hardness
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Microstructure
Nano-composites
Nano-whiskers
Nanostructure
Plastic deformation
Silicon nitride
SPS
Superplastic deformation
Superplastic forming
Superplasticity
Wear
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A superplastic deformation of pre-sintered Si3N4-based nanocrystalline ceramics and Si3N4 nano-whisker reinforced composites has been investigated. Superplastic deformation tests have been carried out in the temperature range from 1500 to 1600°C under 56kN compression in nitrogen. During the tests, all nano-composites exhibited high rates of deformation (1.6–5.4×10−3s−1) corresponding to high activation energy in the range of 538–699kJ/mol. The composites enhanced by Si3N4 nano-whiskers exhibited the formation of anisotropic microstructure with anisotropic mechanical properties. The highest Vickers hardness ~19GPa and lowest coefficient of dry wear 0.39 was exhibited by the TiN–Si3N4 nano-composite.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2014.03.109