Characterization of plasma-sprayed Y2O3 coating and investigation of its visual aspect change

Seok, Hyun‐Kwang; Choi, Eun Young; Cha, Pil-Ryung; Son, Myung-Chan; Choi, Byoung Lyong

doi:10.1016/j.surfcoat.2010.10.045

Cited by 18 publications

(5 citation statements)

References 18 publications

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“…Longer spray distances are helpful for the fabrication of pure white coatings. Under longer spray distances the re-oxidation of the particles can occur due to the relatively low ambient temperature and presence of abundant oxygen [21]. The surfaces of coatings after breakdown were analyzed using SEM and the pictures are shown in Figure 9.…”

Section: Dielectric Strength Testmentioning

confidence: 99%

On the dielectric strengths of atmospheric plasma sprayed Al2O3, Y2O3, ZrO2–7% Y2O3 and (Ba,Sr)TiO3 coatings

Kotlan

Seshadri

Sampath

et al. 2015

Ceramics International

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Section: Dielectric Strength Testmentioning

confidence: 99%

On the dielectric strengths of atmospheric plasma sprayed Al2O3, Y2O3, ZrO2–7% Y2O3 and (Ba,Sr)TiO3 coatings

Kotlan

Seshadri

Sampath

et al. 2015

Ceramics International

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“…Stoichiometry is affected in a reducing plasma atmosphere of APS process. The re-oxidation of particles can take place with increase of spray distance [18,19]. This is also illustrated by DC resistivity measurements Fig.…”

Section: Electrical Properties Of the Depositsmentioning

confidence: 58%

The role of amorphous phase content on the electrical properties of atmospheric plasma sprayed (Ba,Sr)TiO3 coatings

Kotlan

Seshadri

Sampath

et al. 2016

Ceramics International

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Ba,Sr)TiO 3 coatings deposited on carbon steel substrates were successfully prepared by an atmospheric plasma spray system. Three sets of samples containing different amount of both crystalline and amorphous phases were deposited and consequently studied in order to determine their electrical properties. The results show a clear correlation existing between the amorphous phase content and coating´s electrical properties. The resistivity increases with increase of amorphous phase content. Relative permittivity for low frequencies decreases and become more stable with frequency tuning when amorphous phase content increased. The maximum relative permittivity value is in the range 75-200 for frequency 1 kHz. The loss factor varies between 0.23 and 0.03 for all studied samples. The loss factor is at the lower limit of these values and frequency much less dependent when the coating contains 15 wt.% of amorphous phase and more. The band gap of all samples is between 2.75 eV and 2.90 eV. Microstructure and hardness were evaluated in order to determine basic mechanical properties of deposits.

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“…The intensified ablation behavior in the LST coating irradiated by a high laser power density is closely related to the relevant optical behavior. Some literature including our previous work has reported that oxygen vacancies are easily formed and result in δ < 0 in the LST material system when the LST material is prepared at a low oxygen partial pressure or in a high-temperature environment (e.g., plasma spraying or high laser power density irradiation, shown in Figure ), and they have a significant impact on its microstructure and optical performance. ,− Specifically, the effect of oxygen vacancies formed by high laser power density irradiation on the optical reflectivity of the LST coating could be explained in two aspects. From the view of the microstructure, the low reflectivity of the LST (δ < 0) coating is attributed to oxygen depletion in the LST crystal lattice because the oxygen vacancies can act as absorption centers during the propagation of the laser within the crystal, and the laser phonon scattering easily occurs in crystal structural defects .…”

Section: Results and Discussionmentioning

confidence: 99%

Ablation Behavior of Plasma-Sprayed La_1–xSr_xTiO_3+δ Coating Irradiated by High-Intensity Continuous Laser

Zhu

Gao

et al. 2017

ACS Appl. Mater. Interfaces

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Laser protection for optical components, particularly those in high-power laser systems, has been a major concern. LaSrTiO with its good optical and thermal properties can be potentially applied as a high-temperature optical protective coating or high-reflectivity material for optical components. However, the high-power laser ablation behavior of plasma-sprayed LaSrTiO (x = 0.1) coatings has rarely been investigated. Thus, in this study, laser irradiation experiments were performed to study the effect of high-intensity continuous laser on the ablation behavior of the LaSrTiO coating. The results show that the LaSrTiO coating undergoes three ablation stages during laser irradiation: coating oxidation, formation and growth of new structures (columnar and dendritic crystals), and mechanical failure. A finite-element simulation was also conducted to explore the mechanism of the ablation damage to the LaSrTiO coating and provided a good understanding of the ablation behavior. The apparent ablation characteristics are attributed to the different temperature gradients determined by the reflectivity and thermal diffusivity of the LaSrTiO coating material, which are critical factors for improving the antilaser ablation property. Now, the stainless steel substrate deposited by it can effectively work as a protective shield layer against ablation by laser irradiation.

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Characterization of plasma-sprayed Y2O3 coating and investigation of its visual aspect change

Cited by 18 publications

References 18 publications

On the dielectric strengths of atmospheric plasma sprayed Al2O3, Y2O3, ZrO2–7% Y2O3 and (Ba,Sr)TiO3 coatings

On the dielectric strengths of atmospheric plasma sprayed Al2O3, Y2O3, ZrO2–7% Y2O3 and (Ba,Sr)TiO3 coatings

The role of amorphous phase content on the electrical properties of atmospheric plasma sprayed (Ba,Sr)TiO3 coatings

Ablation Behavior of Plasma-Sprayed La_1–xSr_xTiO_3+δ Coating Irradiated by High-Intensity Continuous Laser

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Characterization of plasma-sprayed Y2O3 coating and investigation of its visual aspect change

Cited by 18 publications

References 18 publications

On the dielectric strengths of atmospheric plasma sprayed Al2O3, Y2O3, ZrO2–7% Y2O3 and (Ba,Sr)TiO3 coatings

On the dielectric strengths of atmospheric plasma sprayed Al2O3, Y2O3, ZrO2–7% Y2O3 and (Ba,Sr)TiO3 coatings

The role of amorphous phase content on the electrical properties of atmospheric plasma sprayed (Ba,Sr)TiO3 coatings

Ablation Behavior of Plasma-Sprayed La1–xSrxTiO3+δ Coating Irradiated by High-Intensity Continuous Laser

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Ablation Behavior of Plasma-Sprayed La_1–xSr_xTiO_3+δ Coating Irradiated by High-Intensity Continuous Laser