Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructure
Chemical Vapour Infiltration (CVI) technique has been long used to produce carbon/carbon composites. The Pyrolytic Carbon (Py-C) matrix infiltrated by CVI could have different microstructures, i.e. Rough Laminar (RL), Smooth Laminar (SL) or Isotropic (ISO). These matrix microstructures, characterize...
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Gruppo Italiano Frattura
2014-09-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://212.237.37.202/index.php/fis/article/view/1289 |
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| author | F. Burgio P. Fabbri G. Magnani M. Scafè L. Pilloni A. Brentari A. Brillante T. Salzillo |
| author_facet | F. Burgio P. Fabbri G. Magnani M. Scafè L. Pilloni A. Brentari A. Brillante T. Salzillo |
| author_sort | F. Burgio |
| collection | DOAJ |
| description | Chemical Vapour Infiltration (CVI) technique has been long used to produce carbon/carbon composites. The Pyrolytic Carbon (Py-C) matrix infiltrated by CVI could have different microstructures, i.e. Rough Laminar (RL), Smooth Laminar (SL) or Isotropic (ISO). These matrix microstructures, characterized by different properties, influence the mechanical behaviour of the obtained composites. Tailoring the process parameters, it is possible to direct the infiltration towards a specific Py-C type. However, the factors, influencing the production of a specific matrix microstructure, are numerous and interconnected, e.g. temperature, pressure, flow rates etc. Due to the complexity of the physical and chemical phenomena involved in CVI process, up to now it has not been possible to obtain a general correlation between CVI process parameters and Py–C microstructure. This study is aimed at investigating the relationship between infiltration temperature and the microstructure of obtained Py-C, for a pilot - sized CVI/CVD reactor. Fixing the other process parameters and varying only the temperature, from 1100°C to 1300°C, the Py-C infiltration was performed on fibrous preforms. Polarized light microscopy, with quantitative measurements of average extinction angle (Ae), and Raman spectroscopy were used to characterize the obtained Py-C microstructures. |
| format | Article |
| id | doaj-art-b2b17fe3f0c64d05860b5a3e7c97b136 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2014-09-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-b2b17fe3f0c64d05860b5a3e7c97b1362025-01-03T00:39:49ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932014-09-01830Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructureF. Burgio0P. Fabbri1G. Magnani2M. Scafè3L. Pilloni4A. Brentari5A. Brillante6T. Salzillo7ENEA - Faenza Technical Unit for Material Technologies (UTTMATF) Via Ravegnana, 186 – 48018 Faenza - ItalyENEA - Faenza Technical Unit for Material Technologies (UTTMATF) Via Ravegnana, 186 – 48018 Faenza - ItalyENEA - Faenza Technical Unit for Material Technologies (UTTMATF) Via Ravegnana, 186 – 48018 Faenza - ItalyENEA - Faenza Technical Unit for Material Technologies (UTTMATF) Via Ravegnana, 186 – 48018 Faenza - ItalyENEA, Chemical and Technology Unit (UTTMAT-CHI)Certimac S.c.a.r.l.University of BolognaUniversity of BolognaChemical Vapour Infiltration (CVI) technique has been long used to produce carbon/carbon composites. The Pyrolytic Carbon (Py-C) matrix infiltrated by CVI could have different microstructures, i.e. Rough Laminar (RL), Smooth Laminar (SL) or Isotropic (ISO). These matrix microstructures, characterized by different properties, influence the mechanical behaviour of the obtained composites. Tailoring the process parameters, it is possible to direct the infiltration towards a specific Py-C type. However, the factors, influencing the production of a specific matrix microstructure, are numerous and interconnected, e.g. temperature, pressure, flow rates etc. Due to the complexity of the physical and chemical phenomena involved in CVI process, up to now it has not been possible to obtain a general correlation between CVI process parameters and Py–C microstructure. This study is aimed at investigating the relationship between infiltration temperature and the microstructure of obtained Py-C, for a pilot - sized CVI/CVD reactor. Fixing the other process parameters and varying only the temperature, from 1100°C to 1300°C, the Py-C infiltration was performed on fibrous preforms. Polarized light microscopy, with quantitative measurements of average extinction angle (Ae), and Raman spectroscopy were used to characterize the obtained Py-C microstructures.https://212.237.37.202/index.php/fis/article/view/1289Py-C microstructure |
| spellingShingle | F. Burgio P. Fabbri G. Magnani M. Scafè L. Pilloni A. Brentari A. Brillante T. Salzillo Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructure Fracture and Structural Integrity Py-C microstructure |
| title | Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructure |
| title_full | Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructure |
| title_fullStr | Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructure |
| title_full_unstemmed | Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructure |
| title_short | Cf/C composites: correlation between CVI process parameters and Pyrolytic Carbon microstructure |
| title_sort | cf c composites correlation between cvi process parameters and pyrolytic carbon microstructure |
| topic | Py-C microstructure |
| url | https://212.237.37.202/index.php/fis/article/view/1289 |
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