Double-walled carbon nanotube/zirconia composites: Preparation by spark plasma sintering, electrical conductivity and mechanical properties
| Autor: | Claude Estournès, Alicia Weibel, Dalya Al-Kattan, Alain Peigney, Christophe Laurent, Anne Kasperski |
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| Přispěvatelé: | Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Matériaux Carbonnanotubes chemistry.chemical_element Spark plasma sintering 02 engineering and technology Carbon nanotube 01 natural sciences [SPI.MAT]Engineering Sciences [physics]/Materials law.invention Fracture toughness law 0103 physical sciences Materials Chemistry Cubic zirconia Yttriastabilizedzirconia(YSZ) Ceramic Composite material Yttria-stabilized zirconia Composites 010302 applied physics Process Chemistry and Technology Sparkplasmasintering(SPS) 021001 nanoscience & nanotechnology Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry 13. Climate action visual_art Ceramics and Composites visual_art.visual_art_medium 0210 nano-technology Carbon |
| Zdroj: | Ceramics International Ceramics International, Elsevier, 2015, vol. 41, pp. 13731-13738. ⟨10.1016/j.ceramint.2015.08.034⟩ |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2015.08.034 |
| Popis: | International audience; Double-walled carbon nanotube/yttria-stabilized zirconia composite powders with carbon contents up to 6.3 wt% are prepared by soft covalent functionalization of carbon nanotubes (CNTs) followed by mixing with a nanometric yttria-stabilized zirconia (YSZ) powder. Composites are densified by spark plasma sintering (SPS). The composites present an electrical conductivity (0.09–0.88 S cm−1) which is among the highest values reported in the literature. Both the fracture strength (σf) and the single-edged notched beam fracture toughness (KIc) are measured for the first time on CNT/YSZ composites. The best mechanical properties (σf=694 MPa; KIc=7 MPa m1/2), obtained for low carbon contents (up to 1.2 wt%), are among the highest reported up to now. However, the fracture toughness is lower than that of the YSZ ceramic (KIc=10.3 MPa m1/2) whose mechanical properties are outstanding, taking into account its very fine microstructure. |
| Databáze: | OpenAIRE |
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