Origin of Nickel Catalytic Particles in Carbon Nanotube Formation on a High-Carbon 25Cr–35Ni–Nb Cast Alloy
| Autor: | Sophie Cazottes, Nicolas Vaché, Claude Duret-Thual, Christel Augustin, Thierry Douillard, François Dupoiron, Philippe Steyer |
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| Přispěvatelé: | Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), TOTAL TRTG, Consortium Lyon Saint-Etienne de Microscopie (CLYM), École normale supérieure - Lyon (ENS Lyon)-École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM), Institut de la Corrosion [Fraisses], TOTAL Research & Technology Gonfreville (TRTG), École normale supérieure de Lyon (ENS de Lyon)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy Nickel carbides Alloy Oxide Carbon nanotubes chemistry.chemical_element 02 engineering and technology Carbon nanotube 25Cr35Ni cast alloy engineering.material 01 natural sciences Catalysis law.invention [SPI.MAT]Engineering Sciences [physics]/Materials Inorganic Chemistry chemistry.chemical_compound law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Materials Chemistry 010302 applied physics Thermo-calc Metals and Alloys Nickel Chemical engineering chemistry Oxide scale Transmission electron microscopy engineering Carbon Water vapor |
| Zdroj: | Oxidation of Metals Oxidation of Metals, Springer Verlag, 2019, 91 (3-4), pp.279-290. ⟨10.1007/s11085-018-9880-3⟩ Oxidation of Metals, 2019, 91 (3-4), pp.279-290. ⟨10.1007/s11085-018-9880-3⟩ |
| ISSN: | 0030-770X 1573-4889 |
| DOI: | 10.1007/s11085-018-9880-3⟩ |
| Popis: | International audience; In this study, carbon nanotubes (CNTs) were formed on a high-carbon 25Cr35Ni–Nb cast alloy using a laboratory-scale experimental set-up that simulated favorable conditions for CNT growth in the presence of ethane and water vapor. After 45 min of exposure to the reactive atmosphere, the entire sample surface was covered with multiwalled nanotubes with an average diameter of approximately 50 nm, indicating the strong catalytic activity of the alloy surface. Transmission electron microscopy combined with energy-dispersive X-ray spectroscopy analyses revealed the presence of iron-containing Ni3C-based catalytic particles at the nanotubes tip. The origin of the nickel in the system was then investigated via cross-sectional observations and discussed. A mechanism similar to the so-called “ex-solution” process was proposed to explain the presence of catalytic particles, while their stability was attested by thermodynamic considerations. A scenario describing the different steps involved in the CNTs formation on the oxide scale is finally proposed. |
| Databáze: | OpenAIRE |
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