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Investigation on the structure of carbonized pitch and calcined coke-carbonized pitch interface in carbon anodes by etching

Published online by Cambridge University Press:  02 November 2016

Xianai Huang ,
Duygu Kocaefe ,
Ying Lu ,
Dipankar Bhattacharyay ,
Yasar Kocaefe  and
Patrick Coulombe
Xianai Huang*
Affiliation:
University of Quebec at Chicoutimi 555, Boulevard de l'Université, Chicoutimi, QC G7H 2B1, Canada
Duygu Kocaefe
Affiliation:
University of Quebec at Chicoutimi 555, Boulevard de l'Université, Chicoutimi, QC G7H 2B1, Canada
Ying Lu
Affiliation:
University of Quebec at Chicoutimi 555, Boulevard de l'Université, Chicoutimi, QC G7H 2B1, Canada
Dipankar Bhattacharyay
Affiliation:
University of Quebec at Chicoutimi 555, Boulevard de l'Université, Chicoutimi, QC G7H 2B1, Canada
Yasar Kocaefe
Affiliation:
University of Quebec at Chicoutimi 555, Boulevard de l'Université, Chicoutimi, QC G7H 2B1, Canada
Patrick Coulombe
Affiliation:
Aluminerie Alouette Inc., Sept-Îles, Québec G4R 5M9, Canada
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

A novel, simple, quick, and economic method has been developed to etch samples for characterizing the structural aspects of carbonized pitch alone and in baked anodes. Hot air is used to etch the polished carbonized pitch surface for creating its topography; followed by the characterization of the structure using scanning electron microscope. Hot air preferentially etches the carbonized pitch, which make the differentiation of carbonized pitch from the calcined coke particles possible in baked anode. After etching, lamellar parallel cracks are created and fine granular mosaics are observed on the surfaces of carbonized pitch. The structural composition in baked anode differs visibly from the pure carbonized pitch baked under the same conditions. This may be due to the effect of fine coke particles in anode on the formation of structure during baking. The etching technique permits the determination of the internal structure of carbonized pitch and its interface with coke in anode.

Keywords

carbon anodeetchingstructurecarbonized pitchscanning electron microscopyinterface
Type
Article
Information
Journal of Materials Research , Volume 31 , Issue 22 , 28 November 2016 , pp. 3513 - 3521
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Copyright
Copyright © Materials Research Society 2016 

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References

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