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Porous sandwich ceramic of layered silicon nitride-zirconia composite with various multilayered graphene content

 
: Balazsi, Katalin; Furko, Monika; Liao, Zhongquan; Gluch, Jürgen; Medved, David; Sedlák, Richard; Dusza, Jan; Zschech, Ehrenfried; Balazsi, Csaba

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Volltext ()

Journal of alloys and compounds 832 (2020), Art. 154984, 10 S.
ISSN: 0925-8388
Hungarian National Research Development and Innovation Office NRDI
FLAG-ERA; NKFIH NN 127723
Multifunctional Ceramic/Graphene Coatings for New Emerging Applications
Hungarian National Research Development and Innovation Office NRDI
FLAG-ERA; NKFIH-NNE 129976
Multifunctional Ceramic/Graphene Coatings for New Emerging Applications
Deutsche Forschungsgemeinschaft DFG
397380564
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IKTS ()
sandwich structure; multilayered graphene; hot isostatic pressing; MLG; Si3N4-ZrO2; porous ceramic

Abstract
The influence of the various content of the multilayered graphene (MLG) on the structural and mechanical properties of the final bulk porous silicon nitride-zirconia (Si3N4-ZrO2) based ceramics was investigated. The ceramic composites were prepared in the form of the laminated structure with different (5-30-5 wt% and 30-5-30 wt%) MLG content by hot isostatic pressing. Homogeneous distribution of the MLGs, a completed phase transition from α to β-Si3N4 in case of 5 wt% MLG have been observed. The structural examinations revealed that the multilayered graphene and zirconia particles owing to their different sizes and shapes influenced the porous microstructure evolution and the related mechanical properties of the composites. The sandwich structures enhanced the mechanical properties compared to reference ceramic with 30 wt% MLG. The position of the layer with higher graphene content, high ratio of α/β phase of Si3N4 and higher porosity had crucial effect on the final mechanical properties.

: http://publica.fraunhofer.de/dokumente/N-586766.html