Synthesis of thermal spray grade yttrium oxide powder and its application for plasma spray deposition

Padmanabhan, P.V.A.; Ramanathan, S.; Sreekumar, K.; Satpute, R.U.; Kutty, T.R.G.; Gonal, M. R.; Gantayet, L.M.

doi:10.1016/j.matchemphys.2007.06.027

Cited by 43 publications

(17 citation statements)

References 5 publications

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“…Ceramic-coated trays made of tantalum and molybdenum are also used for melting and high-temperature processing of uranium and its alloys. [33][34][35][36][37][38][39][40] Aluminum oxide has been used for short duration handling of molten uranium and for hightemperature processing of uranium alloys. However, aluminum oxide is not stable in vacuum, or under reducing atmosphere.…”

Section: Plasma-sprayed Coatings For Molten Metal Corrosion Barrier Amentioning

confidence: 99%

Plasma-Sprayed Ceramic Coatings for Barrier Applications Against Molten Uranium Corrosion

Ananthapadmanabhan¹,

Chakravarthy²,

Chaturvedi³

et al. 2015

JOM

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Section: Plasma-sprayed Coatings For Molten Metal Corrosion Barrier Amentioning

confidence: 99%

Plasma-Sprayed Ceramic Coatings for Barrier Applications Against Molten Uranium Corrosion

Ananthapadmanabhan¹,

Chakravarthy²,

Chaturvedi³

et al. 2015

JOM

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“…A Gibbs energy minimization study of the Y 2 O 3 -U system indicates that yttrium oxide is chemically stable up to the melting point of yttria (2410°C), and it shows greater stability in comparison with uranium oxides. [6][7][8] In the present study, yttrium oxides were deposited on graphite and niobium substrates using slurry and plasma-spray coating methods, and their characteristics were compared. Thermal cycling tests were performed to investigate the effect of repeated heating and cooling on the interface between the coating layers and substrates.…”

Section: Introductionmentioning

confidence: 99%

Protective yttria coatings of melting crucible for metallic fuel slugs

Kim

Song

Kim

et al. 2014

Surf. Interface Anal.

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As one of the candidate coating materials for a melting crucible, yttrium oxides were deposited on graphite and niobium substrates using slurry and plasma spraying methods. Thermal cycling tests and interaction studies between U-Zr/U-Zr-RE fuel melt and the Y 2 O 3 coatings were carried out to evaluate the performance as reusable coatings for a melting crucible. A multilayer coating method was also applied to overcome the issue of a thermal expansion mismatch between the coating and substrate. The results showed that the plasma-sprayed coatings showed a good consolidation after deposition compared to slurry coating. The plasma-sprayed Y 2 O 3 coating on the niobium substrate showed better thermal cycling resistance than those coated on a graphite substrate. The proposed TaC/Y 2 O 3 double-layer coating which was plasma-sprayed on the niobium substrate showed improved characteristics with no reaction layer formation and no separation from the substrate after the interaction with the U-Zr-RE melt.

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“…This selection was done on the basis of the free energy needed for oxide formation. Because the free energy of Y 2 O 3 formation is lower than that required for the formation of the oxides of contact materials, Y 2 O 3 is not expected to react and be reduced up to 3,000 K [19,20]. A sheathed thermocouple was placed inside the crucible for directly monitoring the temperature of the molten alloy.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and evaluation of rare-earth-bearing fuel slugs for sodium-cooled fast reactors

Kim

Song

Kim

et al. 2014

J Radioanal Nucl Chem

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Separation of rare-earth (RE) elements from minor actinides is difficult in pyroprocessing, especially for light REs (e.g., Nd, Ce, Pr, and La). Herein, U-10 wt%Zr fuel slugs containing 0, 3, and 7 wt%RE (RE: a rare-earth alloy comprising 53 % Nd, 25 % Ce, 16 % Pr, and 6 % La by weight) were prepared by gravity casting. Their casting soundness was characterized by gamma-ray radiography and immersion density measurement, while their microstructures and compositions were analyzed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. Their actual compositions and impurities were confirmed using inductively coupled plasma atomic emission spectrometry. The compatibility of casting components and recovery of radioactive materials were evaluated based on the RE content.

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Synthesis of thermal spray grade yttrium oxide powder and its application for plasma spray deposition

Cited by 43 publications

References 5 publications

Plasma-Sprayed Ceramic Coatings for Barrier Applications Against Molten Uranium Corrosion

Plasma-Sprayed Ceramic Coatings for Barrier Applications Against Molten Uranium Corrosion

Protective yttria coatings of melting crucible for metallic fuel slugs

Fabrication and evaluation of rare-earth-bearing fuel slugs for sodium-cooled fast reactors

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