Development and Characterization of Vacuum Plasma Sprayed Thin Film Solid Oxide

Lang, Michael; Henne, R.; Schaper, S.; Schiller, Günter

doi:10.1361/105996301770349141

Cited by 87 publications

(41 citation statements)

References 2 publications

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“…In the past decade, the most interesting application of plasma spraying is the manufacturing of intermediate-temperature direct-oxidation SOFCs. 21) 24) In plasma spraying, the electrolyte buildup comprises a huge number of splats deposited from the solidification of molten particles. Spraying powder with significantly different particle sizes can lead to the finer portion being overheated or even evaporated and/or the coarser particles being incompletely melted.…”

Section: )10)mentioning

confidence: 99%

Effects of enthalpy-enhancing gas on ionic conductivity of atmospheric plasma-sprayed 3.9 mol % yttria-stabilized zirconia electrolyte for 75–106 micron particles

Wu¹,

Fung²

2012

J. Ceram. Soc. Japan

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Enthalpy-enhancing gas is used to optimize the ionic conductivity of atmospheric plasma-sprayed 3.9 mol % yttria-stabilized zirconia (3.9YSZ) electrolyte. In the experiment, three hydrogen gas flow rates are used to control the plasma energy. The 3.9YSZ feedstock powder is sieved to obtain particles with sizes in the range of 75106¯m. The electrolyte has the highest hardness and lowest roughness when sprayed at hydrogen gas flow rates of 12 and 7 Lmin ¹1 , respectively. The electrolyte bulk density increases and the apparent porosity decreases with increasing hydrogen gas flow rate. A 3.9YSZ electrolyte with an ionic conductivity of 1789¯ (³ cm) ¹1 is obtained at 800°C with a hydrogen gas flow rate of 12 Lmin ¹1 . It is controlled by the grain-boundary conductivity. The increase in grain-boundary conductivity is closely related to a low apparent porosity, low migration energy, and a decrease in grain size. Hydrogen gas enhances the growth of columnar grains and suppresses the formation of the monoclinic phase, which is attributed to increased intragrain conductivity.

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Section: )10)mentioning

confidence: 99%

Effects of enthalpy-enhancing gas on ionic conductivity of atmospheric plasma-sprayed 3.9 mol % yttria-stabilized zirconia electrolyte for 75–106 micron particles

Wu¹,

Fung²

2012

J. Ceram. Soc. Japan

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“…Plasma spray technologies are already in use for solid oxide fuel cell (SOFC) preparation, but VLPPS has the potential for dramatic improvement over traditional plasma spray [9,15,[19][20][21][22][23][24][25]. Firstly, the VLPPS system provides dynamic control over the ambient chamber pressure during processing.…”

Section: New Applications and Opportunities For Vlppsmentioning

confidence: 99%

“…Firstly, the VLPPS system provides dynamic control over the ambient chamber pressure during processing. Thus, entire fuel cell systems can be constructed with measured or graded porosities to optimize each component in the cell [20][21][22][23]25]. In addition, the VLPPS process's ability to create thin and dense coatings makes it better suited than traditional thermal spray processes towards meeting the design criteria for SOFC electrolytes [9,15,19,20,22].…”

Section: New Applications and Opportunities For Vlppsmentioning

confidence: 99%

Very Low Pressure Plasma Spray—A Review of an Emerging Technology in the Thermal Spray Community

et al. 2011

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Abstract:A fundamentally new family of thermal spray processes has emerged. These new processes, collectively known as very low pressure plasma spray or VLPPS, differ from traditional thermal spray processes in that coatings are deposited at unusually low chamber pressures, typically less than ~800 Pa (6 Torr). Depending upon the specific process, deposition may be in the form of very fine molten droplets, vapor phase deposition, or a mixture of vapor and droplet deposition. Resulting coatings are similar in quality to coatings produced by alternative coating technologies, such as physical vapor deposition (PVD) or chemical vapor deposition (CVD), but deposition rates can be roughly an order of magnitude higher with VLPPS. With these new process technologies modified low pressure plasma spray (LPPS) systems can now be used to produce dense, high quality coatings in the 1 to 100 micron thickness range with lamellar or columnar microstructures. A history of pioneering work in VLPPS technology is presented, deposition mechanisms are discussed, potential new applications are reviewed, and challenges for the future are outlined. OPEN ACCESSCoatings 2011, 1 118

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“…However, APS which is a plasma based method, is still being the most advantageous one because it does not require subsequent heat treatment, leading thus to a more faster method than the conventional one and a less expensive one for SOFCs components achievement [20][21][22][23], comparing with others deposition processes such as electrochemical vapour deposition [24] and vacuum plasma spray [25], which need sophisticated equipments and a controlled atmosphere that consequently increases the fabrication cost. Moreover, APS easily controls the microstructure and material deposition rates through variation of spray parameters [26].…”

Section: Activation Andmentioning

confidence: 99%

Thermal stability of atmospheric plasma sprayed (Ni, Cu, Co)–YSZ and Ni–Cu–Co–YSZ anodes cermets for SOFC application

Benyoucef

Klein

Rapaud

et al. 2009

Journal of Physics and Chemistry of Solids

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This paper reports the results of the thermal stability study of M-YSZ (M= Ni, Cu, Co, Cu-Co, Ni-Cu-Co) SOFC anode cermets materials at different heat treatment temperatures. The cermets were elaborated by atmospheric plasma spraying (APS) with optimised conditions and then submitted to heat treatments at 800°C and 1000°C, respectively. Scanning electron microscopy and X-ray diffraction were used to characterise, respectively, the morphology and structure of obtained films, before and after thermal annealing. A correlation was made between the differential scanning calorimetry analysis results and those obtained by X-ray diffraction. Focusing, in this study, on YSZ matrix thermal stability, the obtained results were as following: the A c c e p t e d m a n u s c r i p t 2 monometallic cermets with the lowest amount of metal and the trimetallic one, exhibited a good stability at 800°C whereas at 1000°C, all considered cermets, were unstable with an eutectoid decomposition of YSZ matrix.

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Development and Characterization of Vacuum Plasma Sprayed Thin Film Solid Oxide

Cited by 87 publications

References 2 publications

Effects of enthalpy-enhancing gas on ionic conductivity of atmospheric plasma-sprayed 3.9 mol % yttria-stabilized zirconia electrolyte for 75–106 micron particles

Effects of enthalpy-enhancing gas on ionic conductivity of atmospheric plasma-sprayed 3.9 mol % yttria-stabilized zirconia electrolyte for 75–106 micron particles

Very Low Pressure Plasma Spray—A Review of an Emerging Technology in the Thermal Spray Community

Thermal stability of atmospheric plasma sprayed (Ni, Cu, Co)–YSZ and Ni–Cu–Co–YSZ anodes cermets for SOFC application

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