Surface contamination of alumina ceramics by carbon

Authors

  • Stoja Rešković University of Zagreb Faculty of Metallurgy
  • Tin Brlić University of Zagreb Faculty of Metallurgy
  • Suzana Jakovljević University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture
  • Ivan Jandrlić University of Zagreb Faculty of Metallurgy

Keywords:

aluminium oxide (alumina) ceramics (Al2O3), contamination, scanning electron microscope (SEM), emulsion, carbon

Abstract

This study presents the results of investigating the
cause of contamination of aluminum oxide
ceramics (Al2O3) in the form of brown colored
stain. Contaminated ceramic surfaces were
examined with the scanning electron microscope
(SEM) equipped with the Energy Dispersive
Spectrometer (EDS). The results show the
existence of the carbon in contaminated surface
that does not exist in the basic raw materials
composition, not even in traces. To determine the
place and source of contamination, the
investigations of the production process were
carried out by stages. It was found that the semifinished
product occurs in contact with carbon at
two stages in the manufacturing process; by
sintering semi-finished product on carbon plates
and cooling with emulsion that contains carbon in
traces during cutting. It was shown that
contamination occurs in contact with alumina
ceramics sintered on carbon plates.

Author Biographies

  • Stoja Rešković, University of Zagreb Faculty of Metallurgy
    department of mechanical metallurgy, assoc.prof.
  • Tin Brlić, University of Zagreb Faculty of Metallurgy
    department of mechanical metallurgy, student
  • Suzana Jakovljević, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture
    department for materials, assis. prof.
  • Ivan Jandrlić, University of Zagreb Faculty of Metallurgy
    department of mechanical metallurgy, PhD.

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Published

2017-07-18

Issue

Engineering Review, Vol. 37, No. 3

Section

Articles

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How to Cite

Surface contamination of alumina ceramics by carbon. (2017). Engineering Review, 37(3), 335-340. https://engineeringreview.org/index.php/ER/article/view/816

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