Determination of structural and mechanical properties of multilayer graphene added silicon nitride-based composites

Silicon nitride based nanocomposites have been prepared with different amount (1 and 3 wt%) of multilayer graphene (MLG) as well as exfoliated graphite nanoplatelets (xGnP) and nano graphene platelets (Angstron) in comparison. The microstructure and mechanical properties of the graphene reinforced s...

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Bibliographic Details
Published in:Ceramics international 2012, Vol.38 (1), p.211-216
Main Authors: Kun, Péter, Tapasztó, Orsolya, Wéber, Ferenc, Balázsi, Csaba
Format: Article
Language:English
Subjects:
B. X-ray methods
C. Mechanical properties
D. Si 3N 4
Graphene
Mechanical properties
Multilayers
Nanocomposites
Nanomaterials
Nanostructure
Platelets
Scanning electron microscopy
Silicon nitride
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Summary:Silicon nitride based nanocomposites have been prepared with different amount (1 and 3 wt%) of multilayer graphene (MLG) as well as exfoliated graphite nanoplatelets (xGnP) and nano graphene platelets (Angstron) in comparison. The microstructure and mechanical properties of the graphene reinforced silicon nitride based composite materials have been investigated. Homogeneous distribution of the MLG additives have been observed on the fracture surface of the sintered material. The scanning electron microscopy examinations showed that graphene platelets are inducing porosity in matrix. The bending strength and elastic modulus of MLG/Si 3N 4 composites showed enhanced values compared to the other graphene added silicon nitride ceramic composites. These observations may be explained by the different type and quality of the starting materials and by the dispersion grade of graphene platelets having direct impact to the resulting density of the sintered samples.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2011.06.051