English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/121060
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Microstructure, Elastic and Inelastic Properties of Partially Graphitized Biomorphic Carbons

AutorOrlova, T. S.; Kardashev, B.K.; Smirnov, B. I.; Gutiérrez-Pardo, A.; Ramírez-Rico, J.; Martínez-Fernández, Julián
Fecha de publicación2015
EditorMAIK Nauka/Interperiodica Publishing
CitaciónPhysics of the Solid State, 2015, Vol. 57, No. 3, pp. 586–591
ResumenThe microstructural characteristics and amplitude dependences of the Young’s modulus E and internal friction (logarithmic decrement δ) of biocarbon matrices prepared by beech wood carbonization at temperatures Tcarb = 850–1600°C in the presence of a nickelcontaining catalyst have been studied. Using Xray diffraction and electron microscopy, it has been shown that the use of a nickel catalyst during carbon ization results in a partial graphitization of biocarbons at Tcarb ≥ 1000°C: the graphite phase is formed as 50 to 100nm globules at Tcarb = 1000°C and as 0.5 to 3.0μm globules at Tcarb = 1600°C. It has been found that the measured dependences E(Tcarb) and δ(Tcarb) contain three characteristic ranges of variations in the Young’s modulus and logarithmic decrement with a change in the carbonization temperature: E increases and δ decreases in the ranges Tcarb < 1000°C and Tcarb > 1300°C; in the range 1000 < Tcarb < 1300°C, E sharply decreases and δ increases. The observed behavior of E(Tcarb) and δ(Tcarb) for biocarbons carbonized in the presence of nickel correlates with the evolution of their microstructure. The largest values of E are obtained for samples with Tcarb = 1000 and 1600°C. However, the samples with Tcarb = 1600°C exhibit a higher suscep tibility to microplasticity due to the presence of a globular graphite phase that is significantly larger in size and total volume.
Versión del editorhttp://dx.doi.org/10.1134/S106378341503018X
URIhttp://hdl.handle.net/10261/121060
DOI10.1134/S106378341503018X
Aparece en las colecciones: (ICMS) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Physics Solid.pdf1,03 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.