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Homogeneous Dispersion of Yttrium Oxide Particles in Nickel-Based Superalloy by High Pressure Homogenizing and Ball Milling Method

Jongmin Byun Young-In Lee Sung-Tag Oh

Archives of Metallurgy and Materials | 2021 | vol. 66 | No 4 | 1055-1058 | DOI: 10.24425/amm.2021.136424

Keywords Ni-based superalloy Y2O3 dispersion High pressure homogenizer spark plasma sintering microstructure

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Abstract

An optimum route to fabricate the Ni-based superalloy with homogeneous dispersion of Y2O3 particles is investigated. Ni-based ODS powder was prepared by high-energy ball milling of gas-atomized alloy powders and Y2O3 particles treated with a high-pressure homogenizer. Decrease in particle size and improvement of dispersion stability were observed by high-pressure homogenization of as-received Y2O3 particles, presumably by the powerful cavitation forces and by collisions of the particles. Microstructural analysis for the ball-milled powder mixtures reveal that Ni-based ODS powders prepared from high-pressure homogenization of Y2O3 particles exhibited more fine and uniform distribution of Ni and Y elements compared to the as-received powder. These results suggested that high-pressure homogenization process is useful for producing Ni-based superalloy with homogeneously dispersed oxide particles.

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Bibliography

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Authors and Affiliations

Jongmin Byun

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ORCID:

Young-In Lee

e-mail:

ORCID:

Sung-Tag Oh

e-mail:

ORCID:

Seoul National University of Science and Technology, Department of Materials Science and Engineering & The Institute of Powder Technology, Seoul 01811, Republic of Korea

Synthesis of Y2O3-Dispersed W Powders Prepared by Ultrasonic Spray Pyrolysis and Polymer Solution Route

Hyeonhui Jo Young-In Lee Myung-Jin Suk Young-Keun Jeong Sung-Tag Oh

Archives of Metallurgy and Materials | 2021 | vol. 66 | No 3 | 799-802 | DOI: 10.24425/amm.2021.136383

Keywords Tungsten Y2O3 dispersion Ultrasonic spray pyrolysis Wet chemical route

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Abstract

The nano-sized Y2O3 dispersed W composite powder is prepared by ultrasonic spray pyrolysis of a tungsten precursor using ammonium metatungstate hydrate and a polymer addition solution method using Y-nitrate. XRD analysis for calcined powder showed the formation of WO2 phase by partial oxidation of W powder during calcination in air. The TEM and phase analysis for further hydrogen reduction of calcined powder mixture exhibited that the W powder with a uniform distribution of Y2O3 nanoparticles can be successfully produced. These results indicate that the wet chemical method combined with spray pyrolysis and polymer solution is a promising way to synthesis the W-based composites with homogeneous dispersion of fine oxide particles.

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Bibliography

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Authors and Affiliations

Hyeonhui Jo

Young-In Lee

1 2

e-mail:

ORCID:

Myung-Jin Suk

Young-Keun Jeong

e-mail:

ORCID:

Sung-Tag Oh

1 2

e-mail:

ORCID:

Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
Seoul National University of Science and Technology, The Institute of Powder Technology, Seoul 01811, Republic of Korea
Kangwon National University, Department of Materials Science and Engineering, Samcheok 25913, Republic of Korea
Pusan National University, Graduate School of Convergence Science, Busan 46241, Republic of Korea

Synthesis and Characterization of W Composite Powder with La ₂O ₃-Y ₂O ₃ Nano-Dispersoids by Ultrasonic Spray Pyrolysis

Youn Ji Heo Eui Seon Lee Jeong Hyun Kim Young-In Lee Young-Keun Jeong Sung-Tag Oh

Archives of Metallurgy and Materials | 2022 | vol. 67 | No 4 | 1507-1510 | DOI: 10.24425/amm.2022.141083

Keywords W composite powder La2O3-Y2O3 dispersion Ultrasonic spray pyrolysis Polymeric additive solution method

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Abstract

An optimum route to synthesis the W-based composite powders with homogeneous dispersion of oxide nanoparticles was investigated. The La2O3 dispersed W powder was synthesized by ultrasonic spray pyrolysis using ammonium metatungstate hydrate and lanthanum nitrate. The dispersion of Y2O3 nanoparticles in W- La2O3 powder was carried out by a polymer addition solution method using yttrium nitrate. XPS and TEM analyses for the composite powder showed that the nano-sized La2O3 and Y2O3 particles were well distributed in W powder. This study suggests that the combination processing of ultrasonic spray pyrolysis and polymeric additive solution is a promising way to synthesis W-based composite powders.

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Authors and Affiliations

Youn Ji Heo

1 2

e-mail:

ORCID:

Eui Seon Lee

e-mail:

ORCID:

Jeong Hyun Kim

e-mail:

ORCID:

Young-In Lee

1 2

e-mail:

ORCID:

Young-Keun Jeong

e-mail:

ORCID:

Sung-Tag Oh

1 2

e-mail:

ORCID:

Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
Seoul National University of Science and Technology, The Institute of Powder Technology, Seoul 01811, Republic of Korea
Pusan National University, Graduate School of Convergence Science, Busan 46241, Republic of Korea

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Homogeneous Dispersion of Yttrium Oxide Particles in Nickel-Based Superalloy by High Pressure Homogenizing and Ball Milling Method

Abstract

Bibliography

Authors and Affiliations

Synthesis of Y2O3-Dispersed W Powders Prepared by Ultrasonic Spray Pyrolysis and Polymer Solution Route

Abstract

Bibliography

Authors and Affiliations

Synthesis and Characterization of W Composite Powder with La 2O 3-Y 2O 3 Nano-Dispersoids by Ultrasonic Spray Pyrolysis

Abstract

Authors and Affiliations

Synthesis and Characterization of W Composite Powder with La ₂O ₃-Y ₂O ₃ Nano-Dispersoids by Ultrasonic Spray Pyrolysis