Preparation and performance of alumina ceramic coating doped with aluminum nitride by micro arc oxidation

Yang, Wei; Wu, Shangkun; Xu, Dapeng; Gao, Wei; Yao, Yuhong; Guo, Qiaoqin; Chen, Jian

doi:10.1016/j.ceramint.2020.03.179

Cited by 34 publications

(14 citation statements)

References 21 publications

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“…The change in friction coefficient with respect to time is shown in Figure 4a. The friction coefficient of the 6061 aluminum alloy matrix is about 0.7 [18]. The friction coefficient of Cu is about 0.6 [22].…”

Section: Characterization Of Tribological Behaviormentioning

confidence: 99%

“…MAO coatings surface is typically coarse and porous of the residual discharge channel [14][15][16][17]; however, the residual discharge channel can provide a better bonding force for the copper plating layer. The metal copper layer prepared by electroless copper plating technology can not only improve the decoration and beautification, but also improve the thermal conductivity and electrical conductivity of the alumina ceramic coating, thereby expanding the application field of aluminum alloy [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of MAO + Cu Composite Coatings on Aluminum Alloy

Yang

Gao

et al. 2021

Coatings

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Novel composite coatings were fabricated on 6061 aluminum alloy substrates by two steps combining micro-arc oxidation (MAO) plus electroless copper plating (Cu). Different MAO + Cu composite coatings were compared. Cu continuously and evenly covered an aluminum oxide surface during processing thus changing the surface topography. The adhesion of MAO + Cu composite coating was tested by the pull-out method. The best adhesion strength of the composite coating can reach industrial requirements. The effects of the composite coatings on friction were investigated using a ball-on-disc test method. It is found that copper in composite coatings plays a lubricating effect during the wear process under dry sliding. Furthermore, the mechanisms by which the observed advantages were produced are discussed.

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Section: Characterization Of Tribological Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of MAO + Cu Composite Coatings on Aluminum Alloy

Yang

Gao

et al. 2021

Coatings

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“…The selected substrate material was aluminum oxide ceramic with a purity of 99%, with excellent melting and boiling point, thermal stability and insulation performance [27,28]. There are two through-holes for connecting and fixing the leads on the substrate.…”

Section: Sensor Designmentioning

confidence: 99%

Novel lead-connection technology for thin-film temperature sensors with arbitrary electrode lengths

Mingfeng

Cui

Guo

et al. 2023

Meas. Sci. Technol.

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Traditional thin-film thermocouples have limitations in measuring real surface temperature changes in aircrafts because the connection between the nanofilm and the leads can easily fail. However, how to improve the weak connection has rarely been mentioned in previous studies. In this study, a lead-embedded alumina ceramic substrate is proposed to improve the durability of thin-film thermocouples. Multilayer two-dimensional nanofilms with different thin-film electrode lengths were prepared on a substrate using DC-pulsed magnetron sputtering. Furthermore, the effect of the thin-film electrode length on the sensitivity, response time, and measurement error of the sensor was investigated. The electrode length did not affect the sensitivity and response time; however, as it increased, the temperature measurement error decreased. In addition, the static and dynamic performance, repeatability, measurement accuracy, and service lifetime of the developed sensor were verified. The results showed that the sensor had high sensitivity and linearity and good repeatability, with the response time being in microseconds. The sensor can continue to operate at 500 ℃ for more than 2 h with no signal interruption. The sensor accuracy was 0.43% at 300 ℃.

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“…Nonetheless, as the MAO-coated titanium components work in the seawater, they were subjected to erosion due to the porous structure of the coating surface [17]. Some hard granules such as Si 3 N 4 [18], ZrO 2 [19], AlN [20], or Al 2 O 3 [21] are added to reduce the friction coefficient and improve wear performance of the MAO coatings. However, adding microparticles to the basic electrolyte during the MAO process can cause solution instability.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Properties of Micro Arc Oxidation Coating with Cu Addition on TC4 Alloy in Marine Environment

et al. 2021

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By contrast with the traditional method of adding hard particles into micro arc oxidation (MAO) coating to improve its wear performance, this study introduced copper into the MAO coating on TC4 alloy by adding copper pyrophosphate to enhance the wear property in a marine environment and the antibacterial property. The results demonstrated that the MAO coating with copper pyrophosphate addition showed a porous structure, and Cu was mainly concentrated around micropores. CuO and Cu2O were formed in this MAO coating. This MAO coating with Cu had a high bonding strength to the substrate. Although the hardness of the coating with Cu had been reduced, it could reduce the friction coefficient and enhance the wear property in simulated seawater due to the lubrication of Cu. Furthermore, this MAO coating with Cu addition had obvious antibacterial and bactericidal effects due to the antibacterial effect of Cu.

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Preparation and performance of alumina ceramic coating doped with aluminum nitride by micro arc oxidation

Cited by 34 publications

References 21 publications

Characterization of MAO + Cu Composite Coatings on Aluminum Alloy

Characterization of MAO + Cu Composite Coatings on Aluminum Alloy

Novel lead-connection technology for thin-film temperature sensors with arbitrary electrode lengths

Enhanced Properties of Micro Arc Oxidation Coating with Cu Addition on TC4 Alloy in Marine Environment

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