Heat-shock properties in yttrium-oxide films synthesized from metal–ethylenediamine tetraacetic acid complex through flame-spray apparatus

Xin, Du; Komatsu, Keiji; Abe, Keita; Costa, Takashi; Ikeda, Yutaka; Nakamura, Atsushi; Ohshio, Shigeo; Saitoh, Hidetoshi

doi:10.1007/s00339-017-0839-z

Cited by 7 publications

(6 citation statements)

References 22 publications

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“…Recently, it has been found that the carrier gas plays an important role in determining the thickness and porosity of the resulting films. O 2 was found to be the better carrier gas for fabrication of dense metal oxide films in past studies . In addition, the cooling effects of the substrate, studied using various cooling units for solidification, were shown to be dominated by the heat of vaporization, not by these temperatures .…”

Section: Introductionmentioning

confidence: 98%

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Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Komatsu

Costa

Ikeda

et al. 2018

Int J Applied Ceramic Tech

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Y2O3 films were synthesized on an aluminum alloy (A5052) substrate directly using a flame‐spray apparatus with a H2‐O2 flame. The Y2O3/A5052 joining was also annealed under atmospheric conditions. Although the joining was annealed close to the melting point of the A5052 substrate, the joining showed strong adhesion without delaminations. The resultant Y2O3 coating exhibits a strong adhesion with the aluminum alloy substrate. Elemental diffusion in the joining was not observed from cross‐sectional EDX analysis. Directly ceramic film deposition method by a reactive spraying process was proposed.

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Section: Introductionmentioning

confidence: 98%

“…A new deposition technique using a metal–ethylenediaminetetraacetic acid (EDTA) complex has been developed . In this technique, the metal–EDTA complex powders are introduced using a commercial flame ‐ spraying apparatus.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Komatsu

Costa

Ikeda

et al. 2018

Int J Applied Ceramic Tech

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“…10),11) After the porosity of the metal oxide coating was effectively controlled, a preliminary investigation of thermal shock properties was performed. 8) In the follow-up study, we successfully synthesized Y 2 O 3 films on an aluminum alloy (A5052), and the joining showed strong adhesion without delaminations. 9) Cracks in microstructures are key to determining the mechanical behavior and thermal shock resistance of coatings.…”

Section: Introductionmentioning

confidence: 99%

Splat morphology and microstructure of chelate flame sprayed Er<sub>2</sub>O<sub>3</sub> films

Dan

Zhou

Nakamura

et al. 2020

J. Ceram. Soc. Japan

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The chelate flame spray (CFS) method is an inexpensive flame spray technique with low energy consumption used to deposit metal oxide (M 2 O 3 ) films using M-ethylenediaminetetraacetic acid (EDTA•M•H) complexes. In this study, EDTA•Er•H was used as the raw material to investigate the cross-sectional structures of the Er 2 O 3 films, and substrates with different common materials, i.e., quartz glass, stainless steel (304), and aluminummagnesium alloy (A5052), were selected. We found that in the CFS deposition process, EDTA•Er•H was decomposed, oxidized and melted in the flame to form molten Er 2 O 3 particles, and Er 2 O 3 films with an average thickness of 9.713.5¯m, cross-sectional porosity of 1.64.9 %, and crack numbers of 2951 were deposited on quartz glass. Oxide films with 7.614.3¯m thickness were synthesized on an aluminum-magnesium alloy (A5052) substrate. The cross-sectional porosity and microcrack numbers of these films were 5.26.9 % and 10 20, respectively. In addition, to observe the Er 2 O 3 film stacking structure more clearly, we screened the powder raw materials to make them uniform. The results of this study enable the design of a ceramic film microstructure that reduces cracks in the ceramic film, thereby increasing the application potential.

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“…From the equation, it can be seen that thermal conductivity decreases as porosity increases. Therefore, a new deposition technique using a metalethylenediaminetetraacetic acid (EDTA) complex has been developed [13][14][15] and called the chelate flame-spray (CFS) technique. In this spray technique, the raw materials of metal-EDTA complexes are placed into a feed unit and transported by flowing carrier gas (such as O 2 or N 2 ) to the spray gun.…”

Section: Introductionmentioning

confidence: 99%

Thermal barrier coatings formed by flame-spray with metal–EDTA

Dan

Costa

Guo

et al. 2020

Jpn. J. Appl. Phys.

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Nowadays, the selection of a suitable spray method to design the coating microstructure such as its porosity, is key to effectively improving the properties of the base materials. In this study, the microstructures and thermal insulation capability of chelate flame-sprayed erbium oxide (Er2O3) and yttrium oxide (Y2O3) coatings directly deposited on aluminum alloy (A5052) substrates were investigated. A rotation apparatus and cooling agent (liquid nitrogen) were used during the synthesis to cool the substrate and control the deposited particles’ shape or form during film deposition. The results show that the Y2O3 coatings had higher thermal insulation capability than the Er2O3 coatings. It is worth noting that the thermal insulation capacity of the Y2O3 and Er2O3 coatings synthesized by cooling the substrate with liquid nitrogen was improved. For thicknesses of 90–128 μm and cross-sectional porosities of 12%–33% of the Y2O3 coatings, a temperature drop (ΔTf = 37 °C) of the porous structure Y2O3 coating at 440 °C and an increase from 0.10 to 0.32 of ΔTf per unit micron (°C μm–1) were observed. This was due to the coating having a more undulated layer surface and more complicated microstructures. Therefore, it is a new idea with the chelate flame-spray method to synthesize thermal barrier coatings on low-melting-point-metal materials.

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Heat-shock properties in yttrium-oxide films synthesized from metal–ethylenediamine tetraacetic acid complex through flame-spray apparatus

Cited by 7 publications

References 22 publications

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Splat morphology and microstructure of chelate flame sprayed Er<sub>2</sub>O<sub>3</sub> films

Thermal barrier coatings formed by flame-spray with metal–EDTA

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Heat-shock properties in yttrium-oxide films synthesized from metal–ethylenediamine tetraacetic acid complex through flame-spray apparatus

Cited by 7 publications

References 22 publications

Synthesis of Y2O3 films on an aluminum alloy substrate using flame‐spray apparatus with a H2‐O2 flame

Synthesis of Y2O3 films on an aluminum alloy substrate using flame‐spray apparatus with a H2‐O2 flame

Splat morphology and microstructure of chelate flame sprayed Er<sub>2</sub>O<sub>3</sub> films

Thermal barrier coatings formed by flame-spray with metal–EDTA

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Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame

Synthesis of Y₂O₃ films on an aluminum alloy substrate using flame‐spray apparatus with a H₂‐O₂ flame