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Surface Study of Vitreous Carbon Obtained from Glassy Carbon Powder

Published online by Cambridge University Press:  14 February 2012

F. Dondeo ,
A. J. Damiao ,
W. Miyakawa ,
F. Nascimento ,
L. Fernandes ,
S. Oishi  and
E. Botelho
F. Dondeo
Affiliation:
Photonics Division/Institute for Advanced Studies/DCTA, Trevo Coronel Aviador José Alberto Albano do Amarante, 1, São José dos Campos, CEP 12228-001, Brazil.
A. J. Damiao
Affiliation:
Photonics Division/Institute for Advanced Studies/DCTA, Trevo Coronel Aviador José Alberto Albano do Amarante, 1, São José dos Campos, CEP 12228-001, Brazil.
W. Miyakawa
Affiliation:
Photonics Division/Institute for Advanced Studies/DCTA, Trevo Coronel Aviador José Alberto Albano do Amarante, 1, São José dos Campos, CEP 12228-001, Brazil.
F. Nascimento
Affiliation:
Photonics Division/Institute for Advanced Studies/DCTA, Trevo Coronel Aviador José Alberto Albano do Amarante, 1, São José dos Campos, CEP 12228-001, Brazil.
L. Fernandes
Affiliation:
Photonics Division/Institute for Advanced Studies/DCTA, Trevo Coronel Aviador José Alberto Albano do Amarante, 1, São José dos Campos, CEP 12228-001, Brazil.
S. Oishi
Affiliation:
Department of Materials and Technology, São Paulo State University, Av. Ariberto Pereira da Cunha, 333, Guaratinguetá-SP, CEP 12516-410, Brazil; e-mail: [email protected]
E. Botelho
Affiliation:
Department of Materials and Technology, São Paulo State University, Av. Ariberto Pereira da Cunha, 333, Guaratinguetá-SP, CEP 12516-410, Brazil; e-mail: [email protected]
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Abstract

This work presents a surface study of monolithic vitreous (or glassy) carbon - MVC - obtained from vitreous carbon powder. Defective MVC pieces are crushed in a ball mill and size classified by sifting. The MVC powder is mixed with furfuryl-alcohol resin and compacted in a mould using a hydraulic press. Samples with different powder granulometries are produced in this way and carbonized in a furnace under nitrogen atmosphere. Complete carbonization of the “powder” is achieved in only one day and losses due to breakage of the pieces is less than 5%. These results compare very favorably with respect to traditional MVC production methods where full carbonization may require up to seven days and losses due to breakage can be as high as 70%. After carbonization, samples are sanded and polished. Surface roughness and microstructure are characterized by light microscopy. Porosity is quantified from micrographs using ImageJ software and nanometric height variations are measured by atomic force microscopy.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1373: Symposium S4 – Advanced Structural Materials—2011 , 2012 , imrc11-1373-s4-04
Copyright
Copyright © Materials Research Society 2012

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References

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