Microstructure and self-lubricating property of a novel Al2O3/La2P4O13/MoS2 composite layer in-situ prepared by micro-arc oxidation

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2025-02-18 DOI:10.1016/j.wear.2025.205968

Q. Li, J. Shang, S. Sun

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引用次数: 0

Abstract

A novel Al₂O₃/La₂P₄O₁₃/MoS₂ composite layer was successfully in–situ prepared on 6082-T6 alloy surface utilizing micro-arc oxidation (MAO) technology by introducing Na₂MoO₄, Na₂S, and C₂H₆LaO₃ into the electrolyte. The microstructures, compositions, morphologies and tribological behavior of the composite layer are characterized by XRD, XPS, SEM, EDS, TEM and UMT. The results show that: with the increase of C₂H₆LaO₃ concentration, the surface roughness changed from 1.447 to 2.588 μm, the porosity changed from 3.79 to 2.45 % and the hardness rises from 737.66 to 1177.41–1260.44 HV₁; the self-lubricating phases La₂P₄O₁₃ and MoS₂ were dispersed between the hard phase Al₂O₃; when the concentration was 5 g/L, the average friction coefficient is reduced by 41.66 % compared with the Al₂O₃/MoS₂ composite layer at 0 g/L. There was no obvious mass or volume changes of coupled body (Si₃N₄ balls) before and after sliding wear. The in-situ formation of MoS₂ and La₂P₄O₁₃ in the MAO layer can have a coordinate effects for improving the compactness, hardness and self-lubricating behavior.

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.