Microstructural, Corrosion Resistance, and Tribological Properties of Al[sub.2]O[sub.3] Coatings Prepared by Atmospheric Plasma Spraying

An usual material, EN-GJL-250 cast iron, used for automotive braking systems, was covered with a ceramic material (105NS-1 aluminium oxide) using an industrial deposition system (Sulzer Metco). The main reason was to improve the corrosion and wear (friction) resistance properties of the cast-iron. S...

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Bibliographic Details
Published in:Materials 2022-12, Vol.15 (24)
Main Authors: Bejinariu, Costică, Paleu, Viorel, Stamate, Ciprian Vasile, Cimpoeșu, Ramona, Coteață, Margareta, Bădărău, Gheorghe, Axinte, Mihai, Istrate, Bogdan, Vasilescu, Gabriel Dragos, Cimpoeșu, Nicanor
Format: Article
Language:English
Subjects:
Aluminum oxide
Cast-iron
Diffraction
Tribology
X-rays
Online Access:Get full text
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Summary:An usual material, EN-GJL-250 cast iron, used for automotive braking systems, was covered with a ceramic material (105NS-1 aluminium oxide) using an industrial deposition system (Sulzer Metco). The main reason was to improve the corrosion and wear (friction) resistance properties of the cast-iron. Samples were prepared by mechanical grinding and sandblasting before the deposition. We applied two and four passes (around 12-15 µm by layer) each at 90° obtaining ceramic coatings of 30 respectively 60 µm. The surface of the samples (with ceramic coatings) was investigated using scanning electron microscopy (SEM), dispersive energy spectroscopy (EDS) and X-ray diffraction (XRD). Scratch and micro-hardness tests were performed using CETR-UMT-2 micro-tribometer equipment. The better corrosion resistance of the base material was obtained by applying the ceramic coating. The results present a better corrosion resistance and a higher coefficient of friction of the coated samples.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15249013