The improved thermal radiation property of SiC doped microarc oxidation ceramic coating formed on niobium metal for metal thermal protective system

Yu, Gao; Wang, Yaming; Zhang, Yufeng; Le, Guo; Jia, Dechang; Ouyang, Jia‐Hu; Zhou, Yu

doi:10.1016/j.surfcoat.2016.10.070

Cited by 35 publications

(10 citation statements)

References 41 publications

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“…Clearly, the MAO coatings show remarkable bonding strength and thermal shock resistance performance in this study, which could benefit from titanium alloys applied in the aerospace field. Recently, Ge and co‐workers studied the thermal radiation property of MAO coatings on niobium metal, revealing that SiC particles can significant increase in infrared emissivity values . As for the emissivity of MAO coated titanium alloy, Wang fabricated the high‐infrared emissivity ceramic coatings on titanium alloys by MAO, and the emissivity is over 0.8 tested in the wavelength of 3‐20 μm.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, Ge and co-workers studied the thermal radiation property of MAO coatings on niobium metal, revealing that SiC particles can significant increase in infrared emissivity values. 40 As for the emissivity of MAO coated titanium alloy, Wang 41 fabricated the high-infrared emissivity ceramic coatings on titanium alloys by MAO, and the emissivity is over 0.8 tested in the wavelength of 3-20 lm. Here, we obtained the emissivity value in the wavelength of 3-20 lm also exhibited a high level.…”

Section: Influence Of Niso 4 On the Emissivitymentioning

confidence: 99%

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High‐performance infrared emissivity of micro‐arc oxidation coatings formed on titanium alloy for aerospace applications

Tang

Tao

Wang

et al. 2018

Int J Applied Ceramic Tech

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Aerospace vehicles are subjected to high temperatures because of surrounding aerodynamic drag and the formation of large temperature gradients across the external structural parts of their airframe. To protect the vehicles, high‐infrared emissivity coatings that can radiate a large amount of heat into outer space are in demand. In this work, we describe the development and characterization of high emissivity ceramic coatings formed on a TC4 alloy surface by micro‐arc oxidation. We evaluate, in particular, the influence of NiSO4 concentration on current‐time response, the thickness, surface roughness, morphologies, bonding strength, and emissivity of these coatings. The results indicate that by increasing the NiSO4 concentration in electrolytes, the thickness and surface roughness of the coatings increase. The bonding strength becomes smaller with increasing concentration of NiSO4, but is still maintains a value higher 30 MPa. The coatings possess good thermal shock resistance after being subjected to severe thermal shocks for 50 cycles, and no peeling of the coating is observed. A higher concentration of NiSO4 in electrolytes also leads to an increasing percentage of the nickel components in the coating to form a NiO phase, which enhances the emissivity of the coatings in the wavelength range of 3‐8 μm.

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Section: Discussionmentioning

confidence: 99%

Section: Influence Of Niso 4 On the Emissivitymentioning

confidence: 99%

High‐performance infrared emissivity of micro‐arc oxidation coatings formed on titanium alloy for aerospace applications

Tang

Tao

Wang

et al. 2018

Int J Applied Ceramic Tech

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“…have played unique roles in the syntheses of efficient protective coatings. They also played interesting roles in the fabrication of metallic materials with high thermal and stress resistance, deployed in aviation, pipeline, electronics, biomedicine, gas turbines, and defense applications . The oxide-forming and IR thermal behavior of niobium metal and its protective coatings contribute to the understanding of its corrosion resistance, heat transfer, and transient thermal field characters. , The use of niobium compounds as complementary precursors to silane has shown promising trends in sol–gel chemistry for many material applications.…”

Section: Introductionmentioning

confidence: 99%

Niobia Nanofiber-Reinforced Protective Niobium Oxide/Acrylate Nanocomposite Coatings

Eduok

2020

ACS Omega

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In the present study, the corrosion resistance of a new niobium oxide/acrylate hybrid nanocomposite coating doped with niobia nanofibers is investigated. Nanofibers were initially synthesized from niobium(V) chloride precursor in a novel autoclave approach before fabricating the base coating from a two-step process involving the syntheses of acrylate resin via free radical polymerization and niobium oxide gel from niobium ethoxide via a sol–gel technique. Variants of the synthesized nanocomposite coating were incorporated with varying concentrations of niobia nanofibers before spin-coating on Q235 steel substrates to inhibit corrosive electrolytic ion percolation and further enhance corrosion resistance when treated with chloride-enriched corrosive media. The corrosion resistance of these nanocomposite coatings increased with nanofiber content up to an optimum concentration due to the corrosion-inhibiting and protective effects of niobium barrier layers within these coatings. The presence of the niobia nanofibers also promoted improved surface contact angle and toughened mechanical strengths.

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“…Doping the secondary phase particles in the MAO coating can further improve the tribological properties and even give the coating new functions, which has become a popular research direction [12][13][14]. Secondary phase particles such as Al 2 O 3 [15], SiC [16], Cr 2 O 3 [17], BN [18], and ZrO 2 [13] can be added. The way of entering the MAO coating, the phase transition, and the existing state of secondary phase particles in the molten pool are closely related to the temperature field characteristics of the micro-arc oxidation pool.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the Molten Pool Temperature Field and Its Influence on the Preparation of a Composite Coating on a Ti6Al4V Alloy in the Micro-Arc Oxidation Process

Dong

Zhao

et al. 2020

Materials

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In this study, the phase transition of secondary phase particles in a composite coating is used to estimate the temperature field of the molten pool on a Ti6Al4V alloy in the micro-arc oxidation (MAO) process. The behavior of the sparks and the molten pool during the MAO process was observed in real-time by a long-distance microscope. The microstructures and compositions of the composite coatings were studied by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The results revealed that, for the temperature field distribution range of the molten pool in the active period, the lower limit is 2123 K and the upper limit is not lower than 3683 K. The reason for the multiphase coexistence is that the high-temperature phase is retained by the rapid cooling effect of the electrolyte, and the low-temperature phase is formed due to secondary phase transformation during the long active time of the molten pool temperature field. The strengthening mechanism of the composite coating prepared by adding the secondary phase particles is elemental doping rather than particle enhancement. The secondary phase particles are able to enter the composite coating by adhering to the surface during the cooling process. The secondary phase particles will then be wrapped into the coating in the next active period.

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The improved thermal radiation property of SiC doped microarc oxidation ceramic coating formed on niobium metal for metal thermal protective system

Cited by 35 publications

References 41 publications

High‐performance infrared emissivity of micro‐arc oxidation coatings formed on titanium alloy for aerospace applications

High‐performance infrared emissivity of micro‐arc oxidation coatings formed on titanium alloy for aerospace applications

Niobia Nanofiber-Reinforced Protective Niobium Oxide/Acrylate Nanocomposite Coatings

Characteristics of the Molten Pool Temperature Field and Its Influence on the Preparation of a Composite Coating on a Ti6Al4V Alloy in the Micro-Arc Oxidation Process

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