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The Microstructure and Hardness Properties of ZrO2+Y2O3/Al2O3 Layers Coated by Using Plasma Spray Process on Al Bronze Surface

  • Serkan Özel and Hüseyin Turhan
Published/Copyright: May 13, 2013
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Practical Metallography
From the journal Practical Metallography Volume 47 Issue 10

Abstract

In this study, ZrO2 + Y2O3/Al2O3 powders were coated on the surface of aluminum bronze (Cu + 5 % Al) by using the atmospheric plasma spraying method. The effect of Al2O3 on microstructure and hardness was examined in four different coatings applied by using 5-10-20 % Al2O3 ratio in ZrO2 + Y2O3 and ZrO2 + Y2O3. For this purpose, microstructure images of the coated layers were taken in optical microscope and SEM, EDX and XRD analyses were performed and their microhardness values were measured. It was observed that a porous structure occurred in the coatings containing ZrO2 + Y2O3/Al2O3. The coatings containing Al2O3 showed higher microhardness values than the one without Al2O3, and depending on the increase of Al2O3 amount, the amount of porosity increased and microhardness value decreased.

Kurzfassung

In dieser Untersuchung wurden ZrO2+Y2O3/Al2O3-Pulver durch atmosphärisches Plasmaspritzen auf die Oberfläche von Aluminiumbronze (Cu + 5 % Al) aufgebracht. Untersucht wurden die Auswirkungen von Al2O3 auf Mikrostruktur und Härte in vier verschiedenen Beschichtungen, die mit einem Verhältnis von 5, 10 bzw. 20 % Al2O3 in ZrO2 + Y2O3 und ZrO2 + Y2O3.aufgetragen wurden. Zu diesem Zweck wurden lichtmikroskopische Mikrostrukturaufnahmen der aufgetragenen Schichten angefertigt, REM-, EDX- und XRD-Analysen durchgeführt und die Mikrohärtewerte der Schichten gemessen. Es konnte festgestellt werden, dass in den Beschichtungen, die ZrO2+Y2O3/Al2O3 enthielten, eine poröse Struktur auftrat. Die Beschichtungen, die Al2O3 enthielten, wiesen höhere Mikrohärtewerte als solche ohne Al2O3 auf. In Abhängigkeit von der Erhöhung des Gehaltes an Al2O3, nahm die Porosität zu, und die Mikrohärtewerte nahmen ab.

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Hüseyin Turhan Assoc. Prof. Dr.-Ing. Hüseyin Turhan, born 1956, studied mechanical engineering at the University of Applied Sci. Hamburg. 1998 he received his PhD in Metallurgy at the Firat University. 2006 he became associate professor working at the Firat University, Faculty of Technology, Department of Metallurgy in Elazig, Turkey.

Serkan Özel Assist. Prof. Dr. Serkan Özel, born 1979, studied Metallurgy at the Gazi University in Ankara. 2009 he received his PhD in Metallurgy at the Firat University. 2009 he became assistance professor working at the Bitlis Eren University, Faculty of Engineering and Architecture, Department of Mechanical Eng. in Bitlis, Turkey.

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Received: 2010-3-2
Accepted: 2010-6-9
Published Online: 2013-05-13
Published in Print: 2010-10-01

© 2010, Carl Hanser Verlag, München

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  2. Contents/Inhalt
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Microstructural Characteristic of Co-Cr-Mo Powder Alloy Coating on Stainless Steel by Plasma Transferred Arc Weld Surfacing
  7. The Microstructure and Hardness Properties of ZrO2+Y2O3/Al2O3 Layers Coated by Using Plasma Spray Process on Al Bronze Surface
  8. Eine Schadensanalyse zu den Ursachen für interkristalline Risse in Bauteilen aus Automatenmessing
https://doi.org/10.3139/147.110095

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents/Inhalt
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Microstructural Characteristic of Co-Cr-Mo Powder Alloy Coating on Stainless Steel by Plasma Transferred Arc Weld Surfacing
  7. The Microstructure and Hardness Properties of ZrO2+Y2O3/Al2O3 Layers Coated by Using Plasma Spray Process on Al Bronze Surface
  8. Eine Schadensanalyse zu den Ursachen für interkristalline Risse in Bauteilen aus Automatenmessing
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