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Hard Anodizing and Plasma Electrolytic Oxidation of an Additively Manufactured Al-Si alloy



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Mora Sánchez, H. and Olmo, Rubén del and Rams, J. and Torres, B. and Mohedano Sánchez, Marta and Matykina, E. and Arrabal Durán, Raúl (2021) Hard Anodizing and Plasma Electrolytic Oxidation of an Additively Manufactured Al-Si alloy. Surface & coatings technology, 420 . p. 127339. ISSN 0257-8972

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Official URL: https://doi.org/10.1016/j.surfcoat.2021.127339


Plasma Electrolytic Oxidation (PEO) and Hard Anodizing (HA) coatings are investigated on an Additively Manufactured (AM) Al10Si1Mg alloy obtained via Direct Metal Laser Sintering (DMLS). Results are compared to those obtained for a conventional A361 cast alloy. Findings revealed that the microstructure of the AM alloy, consisting of α-Al cells enclosed in a Si network, produces coatings that are more uniform –in terms of morphology, thickness and roughness of the coating/substrate interface– than those obtained on the cast alloy. However, enhanced oxidation of the fine Si network in the AM alloy results in softer coatings. In both alloys, PEO coatings demonstrate superior wear protection than HA due to the presence of mullite in the former. The anisotropy in the microstructure of the AM alloy influences the tribological behaviour of studied coatings, with the XZ plane showing superior wear performance.

Item Type:Article
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CRUE-CSIC (Acuerdos Transformativos 2021)

Uncontrolled Keywords:Additive Manufacturing Hard Anodizing Plasma Electrolytic Oxidation, Tribology, Aluminium, Silicon
Subjects:Sciences > Chemistry
Sciences > Chemistry > Chemical engineering
ID Code:70120
Deposited On:08 Feb 2022 12:28
Last Modified:22 Feb 2022 09:58

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