Effect of NaAlO2 Co-Electrical Parameters on the Wear Resistance of MAO/MoS2 Self-Lubricating Composite Coatings
Year: 2025
Type: article
Abstract: This study aims to enhance the wear resistance of MAO/MoS2 composite coatings fabricated on TC4 titanium alloy substrates through a composite process of microarc oxidation (MAO) and hydrothermal synthesis. The MAO treatment experiments were designed according to the L16 (45) orthogonal array to optimize the NaAlO2 concentration and electrical parameters (oxidation voltage, frequency, duty ratio, and treating time), with four levels for each factor. The optimized MAO process parameters were identified as a NaAlO2 concentration of 10 g/L, an oxidation voltage of 500 V, a frequency of 200 Hz, a duty ratio of 20%, and a treating time of 30 min. The experimental results indicated a notable reduction in porosity, from 4.45% to 0.30%, in the optimized composite coating. Concurrently, there was a 43.2% increase in microhardness and a 327.9% increase in adhesive strength. Furthermore, the average coefficient of friction (CoF) of the composite coating was observed to be 0.13 at a high load of 20 N and a wear time of 20 min, representing a significant reduction of 68.5% compared to the CoF of the single MAO coating.
Source: Materials
DOI: 10.3390/ma18081825
Authors: Feiyan Liang, Erhui Yang, Na Jia, Weizhou Li, Xiaolian Zhao, Ruixia Yang
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W4409506328