MICROSTRUCTURES AND ABRASIVE PROPERTIES OF THE OXIDE COATINGS ONAl6061ALLOYS PREPARED BY PLASMA ELECTROLYTIC OXIDATION IN DIFFERENT ELECTROLYTES

Kai Wang, Sangsik Byun, Chan Gyu Lee, Bon Heun Koo (), Yi Qi Wang and Jung Il Song
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Kai Wang: School of Nano and Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Sangsik Byun: School of Nano and Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Chan Gyu Lee: School of Nano and Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Bon Heun Koo: School of Nano and Advanced Materials Engineering, Changwon National University, Changwon 641-773, Korea
Yi Qi Wang: Department of Mechanical Engineering, Changwon National University, Changwon 641-773, Korea
Jung Il Song: Department of Mechanical Engineering, Changwon National University, Changwon 641-773, Korea

Surface Review and Letters (SRL), 2010, vol. 17, issue 03, 271-276

Abstract: Al2O3coatings were prepared on T6-temperedAl6061alloys substrate under a hybrid voltage (AC 200 V–60 Hz and DC 260 V value) by plasma electrolytic oxidation (PEO) in 30 min. The effects of different electrolytes on the abrasive behaviors of the coatings were studied by conducting dry ball-on-disk wear tests. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to investigate the coating microstructure. XRD analysis results show that the coatings mainly consist of α- andγ-Al2O3, and some mullite andAlPO4phase inNa2SiO3andNa3PO4containing electrolytes, respectively. The wear test results show that the coatings which were PEO-treated inNa3PO4containing electrolyte presented the most excellent abrasive resistance property.

Keywords: Plasma electrolytic oxidation; Al6061alloy; oxide coating; abrasive behavior; electrolytes; microhardness (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X1001359X

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