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A comparative study on thermally sprayed alumina based ceramic coatings

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Abstract

Aluminium oxide is relatively cheap material, abundant almosteverywhere and therefore it is widely used for thermal sprayapplications. Various alumina based powder containing 13 wt. Titania, two different 40 wt.% Zirconia and three differentcompositions of alumina-zirconia-chromia were deposited byatmospheric plasma spraying (APS) and high power plasma spraying(HPPS). The coatings obtained were evaluated by optical microscopy,microhardness measurements, X-ray diffraction and porositymeasurements. Moreover, abrasion and friction wear resistance wereevaluated by using Pin-on-Disc machine. Microhardness values of APScoatings are relatively high as compared to HPPS coatings except inalumina-zirconia-chromia coatings. HPPS have higher hardness values.APS coatings are much coarser and show higher porosity values thanHPPS coatings. The best wear/friction behaviour exhibited coatingAl2O3-40 wt.% ZrO2 that deposited from agglomerated andsintered powder type.

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Authors and Affiliations

  1. Prod. Engg. Dept., El-Mansoura University, El-Mansoura, Egypt

    A. A. Abdel-Samad

  2. Prod. Engg. Dept., El-Mansoura University, El-Mansoura, Egypt

    A. M. M. El-Bahloul & S. A. Rassoul

  3. Materials Science Institute, Aachen University of Technology, Jülicherstr. 342-352, D-52070, Aachen, Germany

    E. Lugscheider

Authors
  1. A. A. Abdel-Samad
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  2. A. M. M. El-Bahloul
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  3. E. Lugscheider
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  4. S. A. Rassoul
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Abdel-Samad, A.A., El-Bahloul, A.M.M., Lugscheider, E. et al. A comparative study on thermally sprayed alumina based ceramic coatings. Journal of Materials Science 35, 3127–3130 (2000). https://doi.org/10.1023/A:1004824104162

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  • DOI: https://doi.org/10.1023/A:1004824104162

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