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Additive Manufacturing
AlSi10Mg substrate
Coating
Lab-scale development of Plasma Electrolytic Nitriding ( PEN ) process on aluminium specimen . Plasma generated on the surface of the specimen is visible during generation of nitrogen-rich ceramic coating .
Conflux Technology ©
Microscopic image of Plasma Electrolytic Nitriding ( PEN ) technology , a technique to increase corrosion resistance on parts made of aluminium alloys .
Plasma Electrolytic Oxidation ( PEO ) Another tactic to improving the performance of 3D printed components is to apply a protective coating on the part ’ s surface . This is particularly important to boost the corrosion resistance of aluminium . “ There are several different methods of coating 3D printed parts ,” explains Dr Milad Laghaei , Associate Research Fellow at Deakin University . “ The most common is painting , but for parts with complex geometries like Conflux ’ s heat exchangers , we cannot coat internal surfaces fully and risk blocking the intricate channels , compromising heat transfer .”
Additionally , paint may not withstand high temperatures or offer necessary chemical resistance , leading to degradation , potential contamination , and compromised performance . An alternative electrochemical coating process is Plasma Electrolytic Oxidation ( PEO ) which works in a similar way to anodization , albeit with significantly higher electrical current in the PEO process . The part is immersed in an electrolyte bath and a high voltage is passed through this electrolyte at a constant current . At this high voltage , the plasma is being generated on the surface of the part leading to micro arc oxidation . The
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