Effect of spraying parameter and injector angle on the properties of in-flight particles and alumina coatings on Al alloy with PA-HT

Hou, Guoliang; Zhao, Xinqing; An, Yulong; Zhou, Hang; Chen, Jianmin

doi:10.1016/j.ceramint.2017.11.085

Cited by 17 publications

(3 citation statements)

References 34 publications

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“…As the spraying voltage increases, the enthalpy and velocity of the particles increase, decreasing the number of unmelted particles. This promotes the fusion of the molten droplets and the ceramic phase, reduces the gap between the layers, and increases the density and hardness of the coating [25]. Kang et al [26] also suggested that the increased spraying voltage increases the melting rate of droplets, which increases the denseness of the coating.…”

Section: Analysis Of Test Resultsmentioning

confidence: 99%

“…Some of the particles with a higher melting point were unmelted and insufficiently deformed when they hit the substrate surface under the action of high-velocity air pressure. Thus, particles were embedded in their original form in the coating surface during the solidification and stacking process [25,37,38]. At the same time, a faster cooling rate caused the droplets to shrink, limiting the droplets' tendency to spread.…”

Section: Surface and Cross-sectional Morphology Of The Coatingmentioning

confidence: 99%

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Microstructure and Tribological Properties of Fe-Based-Al2O3-B4C Composite Coatings Prepared by High-Velocity Arc Spraying

Huang

Lin

et al. 2022

Coatings

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Fe-based-Al2O3-B4C coating was prepared on the low-carbon steel substrates using high-velocity arc spraying. The effects of voltage, current, and distance on the porosity and microhardness of the coating were studied by an orthogonal test, and the optimum spraying parameters were determined. The microstructure and properties of Fe-based-Al2O3-B4C coatings prepared under optimum process parameters were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), microhardness and friction wear tester. The results showed that the optimum process parameters were a spraying voltage of 41 V, a spraying current of 200 A, and a spraying distance of 150 mm. The porosity was 2.24 ± 0.32%, and the microhardness was 1543 ± 145 Hv0.1, which was 8 times that of the substrate. Under the same load of 4.2 N and varying sliding speeds of 500 t/min, 750 t/min, and 1000 t/min, the coefficient of friction of the coating was less than that of the low-carbon steel, and the wear rate of the coating was 65%, 70%, and 63% lower than that of the low-carbon steel, respectively. The main wear mechanism of the coating was material spalling, accompanied by slight oxidative wear and abrasive wear.

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Section: Analysis Of Test Resultsmentioning

confidence: 99%

Section: Surface and Cross-sectional Morphology Of The Coatingmentioning

confidence: 99%

Microstructure and Tribological Properties of Fe-Based-Al2O3-B4C Composite Coatings Prepared by High-Velocity Arc Spraying

Huang

Lin

et al. 2022

Coatings

View full text Add to dashboard Cite

show abstract

“…In plasma spraying field, it is well known that velocity depends mainly on the square root of intensity for ternary plasma [40], [41]. So, an increase in intensity leads to an increase in plasma and particles velocity [42], [39]. Regarding the dihydrogen rate increase, it enhances plasma thermal conductivity which leads to an increase of plasma enthalpy.…”

Section: Plasma Co-spraying Processmentioning

confidence: 99%