@inproceedings{fa8fa14076e14a29b3fb6bfce8de174b,
title = "Characterization of coatings formed on AZX magnesium alloys by plasma electrolytic oxidation",
abstract = "Plasma Electrolytic Oxidation (PEO) is an electrochemical anodization process which involves the application of a high voltage to create intense plasma on a metal surface to form a ceramic type of oxide. The resulted coating exhibits high wear resistance and good corrosion barrier which are suitable to enhance the performance of biodegradable Mg alloys. In this work, the role of alloying element Ca in modifying the characteristics of PEO layer formed on AZ61 series magnesium alloys was investigated. PEO treatment was conducted on AZ61, AZX611, and AZX612 alloys in 0.5 M Na3PO4 solution at a constant current of 200 A/m2 at 25°C for 8 min. The resulted coatings were characterized by field emission-scanning electron microscope (FESEM), X-ray diffraction spectroscopy (XRD), and X-ray fluorescence spectroscopy (XRF), as well as hardness test. The presence of alloying element Ca in the AZ61 alloys accelerated the PEO coatings formation without altering the coating properties significantly. The coating formed on AZX specimen was slightly thicker (~14-17 μm) than that of formed onthe AZ specimens (~13 μm). Longer exposure time to plasma discharge was the reason for faster thickening of the coating layer on AZX specimen. XRD detected a similar crystalline oxide phase of Mg3(PO4)2 in the oxide formed on all of the specimens. Zn was highly incorporated in the coatings with a concentration in the range 24-30 wt%, as analyzed by XRF. Zn compound might exist in amorphous phases. The microhardness test on the coatings revealed similar average hardness ~124 HVon all of the specimens.",
author = "Anawati Anawati and Gumelar, {Muhammad Dikdik}",
note = "Publisher Copyright: {\textcopyright} 2018 Author(s).; 1st International Seminar on Metallurgy and Materials: Metallurgy and Advanced Material Technology for Sustainable Development, ISMM 2017 ; Conference date: 24-10-2017 Through 25-10-2017",
year = "2018",
month = may,
day = "15",
doi = "10.1063/1.5038302",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
editor = "Hasbi, {M. Yunan} and Malau, {Daniel Panghihutan} and Dhyah Annur and Amal, {M. Ikhlasul} and Satrio Herbirowo and Yulinda Lestari",
booktitle = "Proceedings of the International Seminar on Metallurgy and Materials, ISMM 2017",
address = "United States",
}