Densification of metal oxide films synthesized from metal complexes by flame spraying

Komatsu, Keiji; Shirai, Tomoyuki; Toyama, Akira; Iseki, Takao; Xin, Du; Costa, Takashi; Nakamura, Atsushi; Yu, Li; Ohshio, Shigeo; Muramatsu, Hiroyuki; Saitoh, Hidetoshi

doi:10.1016/j.surfcoat.2017.06.020

Cited by 8 publications

(9 citation statements)

References 18 publications

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“…The crystalline phase was unchanged during the cyclic thermal tests at all blast pressures. The same phenomena were observed on Y 2 O 3 films synthesized on SUS substrates . The existence of Y 4 Al 2 O 9 and YAlO 3 crystalline phases was not confirmed in the films.…”

Section: Resultsmentioning

confidence: 89%

“…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%

“…These complex powders decompose in the flame, forming metal oxide particles, which are subsequently deposited on the substrate. Micron‐order‐thickness metal oxide films with 3%‐24% cross‐sectional porosities were deposited on stainless steel (SUS) substrates in several seconds . The metal oxide films were synthesized on a stainless steel (SUS) substrate from EDTA・M・H (M=Y 3+ ,Er 3+ ,Eu 3+ ) complexes through the combustion of H 2 ‐O 2 gas.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…The EDTA precursor powder was complexed and decomposed at approximately 673 K, 10) and the SEM images of the EDTA metal complex are shown in Fig. 1.…”

Section: Methodsmentioning

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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“…A considerable fraction of this kind of research has been devoted to Y 2 O 3 [16][17][18][19][20][21][22][23]. Previous investigations have shown that pores are of consequence in decreasing the thermal transfer of Y 2 O 3 lms, in which the deposited splat forms a honeycomb microstructure lm that exhibits a good thermal insulation capability [16].…”

Section: Introductionmentioning

confidence: 99%

Thermal Insulation Properties of Hollow Y2O3:Eu Spheres Laminated with Er2O3

Dan

Nakamura²,

Saitoh

et al. 2021

Preprint

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Currently, hollow sphere insulating materials are of importance for applications such as energy storage and savings and cryogenic engineering. The structures are formed by single hollow spheres, which can be joined, for example, by sintering. In this study, a 15 wt% Er-EDTA complex aqueous solution in which hollow Y2O3 spheres were mixed was used as the deposition body, and pencil spraying and sintering (PSS) was used to synthesize an Er2O3 hollow Y2O3 sphere composite film on a polished Si substrate. The structure of the composite film was successfully controlled by adjusting the 15 wt% Er-EDTA solution/hollow Y2O3 sphere mass ratio and the jet-to-substrate distance in the PSS process. In addition, the thermal insulation capability of the films was evaluated by the thermal steady-state method. The results show that the Er2O3/hollow Y2O3:Eu sphere composite films have a higher thermal insulation capability at a jet-to-substrate distance of 150 mm and a mass ratio (g) of 3.5:1. For the composite films with thicknesses of 38–92 µm, cross-sectional hollow ratio of 0.8–8.7% and void ratio of 6.3–13.1%, the temperature drop due to the porous (including hollow spheres and voids) structure films at 440°C is ΔTf =47°C. This is mainly associated with the film having more complicated microstructures. Therefore, the Er2O3/Y2O3:Eu composite film has good thermal insulation performance, and a simple preparation method for many kinds of hollow sphere films with complex structures and high porosities by using complex solutions with different compositions is provided.

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Densification of metal oxide films synthesized from metal complexes by flame spraying

Cited by 8 publications

References 18 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 Insulation Properties of Hollow Y2O3:Eu Spheres Laminated with Er2O3

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Densification of metal oxide films synthesized from metal complexes by flame spraying

Cited by 8 publications

References 18 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 Insulation Properties of Hollow Y2O3:Eu Spheres Laminated with Er2O3

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Product

Resources

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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