Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Structural changes during pitch-based carbon granular composites carbonisation
Year:2008
Research Areas
  • Materials
Information
Abstract
This article deals with the study of carbon composites behavior during their carbonization. Composites were prepared using four granular carbons (graphite, anthracite, green petroleum coke, and foundry coke) and four pitches (a commercial impregnating coal-tar pitch, an air-blown and two thermally treated pitches). The evolution of the optical microstructure, porosity, volume, and weight of carbon composites was monitored at different intermediate carbonization temperatures (350, 500, 700, and finally 1000 °C). The porosity of composites increases with carbonization due to volume changes and weight loss of pitches. Weight loss of carbon composites during their carbonization mainly depends on the pitch characteristics and it was slightly influenced by the presence of granular carbon. On the other hand, carbon composites with the commercial coal-tar pitch and foundry coke, anthracite, or graphite deform in the initial stages of carbonization (<350 °C) probably due to the lower porosity of the green pellets and the high amount of low-molecular weight compounds of the pitch. Carbon composites with green petroleum coke underwent important dimensional changes during their carbonization, expanding initially and then shrinking at temperatures above 700 °C. The type of granular carbon strongly influenced the microstructure of the final carbon composite, as a result of its effect on the development of mesophase. Graphite, anthracite and foundry coke delays mesophase development, whereas green petroleum coke accelerates mesophase formation.
International
Si
JCR
Si
Title
JOURNAL OF MATERIALS SCIENCE
ISBN
0022-2461
Impact factor JCR
1,081
Impact info
Volume
43
Journal number
3
From page
906
To page
921
Month
FEBRERO
Ranking
Participants
  • Participante: M. Granda (Instituto del carbón (CSIC))
  • Participante: R. Menéndez (Instituto del carbón (CSIC))
  • Autor: Ana Maria Mendez Lazaro (UPM)
  • Participante: R. Santamaría (Instituto del carbón (CSIC))
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Valorización de Recursos
  • Departamento: Ingeniería de Materiales
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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