Evolution of alumina phase structure in thermal plasma processing

Kimmo Kaunisto; Juha Lagerbom; Mari Honkanen; Tommi Varis; Aloshious Lambai; Gaurav Mohanty; Erkki Levänen; Päivi Kivikytö-Reponen; Erkka Frankberg

doi:10.1016/j.ceramint.2023.03.263

Evolution of alumina phase structure in thermal plasma processing

Kimmo Kaunisto, Juha Lagerbom, Mari Honkanen, Tommi Varis, Aloshious Lambai, Gaurav Mohanty, Erkki Levänen, Päivi Kivikytö-Reponen, Erkka Frankberg

Materiaalitiede ja ympäristötekniikka

Tutkimustuotos: Artikkeli › Tieteellinen › vertaisarvioitu

8 Sitaatiot (Scopus)

18 Lataukset (Pure)

Abstrakti

Alumina (Al₂O₃) remains one the most important engineering ceramic for industrial applications. In addition to the α phase, transition alumina phases have interesting characteristics. Controlling the obtained phase structure from alumina melt requires processes with extreme cooling rates and therefore limits the tailoring capabilities. This study investigates how the cooling rate of pure alumina affects its microstructural properties and phase structure in plasma-based processing. The paper reports phase changes in micron sized granulated alumina particles in high-temperature plasma spheroidization and compares the results to plasma sprayed alumina coatings. Both plasma processes involve melting of the material followed by subsequent rapid cooling. Direct comparison on the alumina phase transitions is obtained for the two methodically distinct processing routes, creating unique microstructures due to difference in their cooling rates.

Alkuperäiskieli	Englanti
Sivut	21346-21354
Julkaisu	Ceramics International
Vuosikerta	49
Numero	13
DOI - pysyväislinkit	https://doi.org/10.1016/j.ceramint.2023.03.263
Tila	Julkaistu - 2023
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Rahoitus

This work was supported by Academy of Finland -project “PlaCeEra – Plastic deformation mechanisms in ceramic materials“ , grant numbers 315451 , 326426 , 315452 . The EBSD work made use of Tampere Microscopy Center facilities at Tampere University. This work was supported by Academy of Finland -project “PlaCeEra – Plastic deformation mechanisms in ceramic materials“, grant numbers 315451, 326426, 315452. The EBSD work made use of Tampere Microscopy Center facilities at Tampere University.

Julkaisufoorumi-taso

Jufo-taso 1

!!ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2023.03.263Lisenssi: CC BY

Evolution of aluminaFinal published version, 11,8 MBLisenssi: CC BY

https://urn.fi/URN:NBN:fi:tuni-202306206860Lisenssi: CC BY

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title = "Evolution of alumina phase structure in thermal plasma processing",

abstract = "Alumina (Al2O3) remains one the most important engineering ceramic for industrial applications. In addition to the α phase, transition alumina phases have interesting characteristics. Controlling the obtained phase structure from alumina melt requires processes with extreme cooling rates and therefore limits the tailoring capabilities. This study investigates how the cooling rate of pure alumina affects its microstructural properties and phase structure in plasma-based processing. The paper reports phase changes in micron sized granulated alumina particles in high-temperature plasma spheroidization and compares the results to plasma sprayed alumina coatings. Both plasma processes involve melting of the material followed by subsequent rapid cooling. Direct comparison on the alumina phase transitions is obtained for the two methodically distinct processing routes, creating unique microstructures due to difference in their cooling rates.",

keywords = "AlO (D), Electron microscopy (B), Powders: solid state reaction (A), Transition phases, X-ray methods (B)",

author = "Kimmo Kaunisto and Juha Lagerbom and Mari Honkanen and Tommi Varis and Aloshious Lambai and Gaurav Mohanty and Erkki Lev{\"a}nen and P{\"a}ivi Kivikyt{\"o}-Reponen and Erkka Frankberg",

note = "Funding Information: This work was supported by Academy of Finland -project “PlaCeEra – Plastic deformation mechanisms in ceramic materials“ , grant numbers 315451 , 326426 , 315452 . The EBSD work made use of Tampere Microscopy Center facilities at Tampere University. Funding Information: This work was supported by Academy of Finland -project “PlaCeEra – Plastic deformation mechanisms in ceramic materials“, grant numbers 315451, 326426, 315452. The EBSD work made use of Tampere Microscopy Center facilities at Tampere University. Publisher Copyright: {\textcopyright} 2023 The Authors",

year = "2023",

doi = "10.1016/j.ceramint.2023.03.263",

language = "English",

volume = "49",

pages = "21346--21354",

journal = "Ceramics International",

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T1 - Evolution of alumina phase structure in thermal plasma processing

AU - Kaunisto, Kimmo

AU - Lagerbom, Juha

AU - Honkanen, Mari

AU - Varis, Tommi

AU - Lambai, Aloshious

AU - Mohanty, Gaurav

AU - Levänen, Erkki

AU - Kivikytö-Reponen, Päivi

AU - Frankberg, Erkka

N1 - Funding Information: This work was supported by Academy of Finland -project “PlaCeEra – Plastic deformation mechanisms in ceramic materials“ , grant numbers 315451 , 326426 , 315452 . The EBSD work made use of Tampere Microscopy Center facilities at Tampere University. Funding Information: This work was supported by Academy of Finland -project “PlaCeEra – Plastic deformation mechanisms in ceramic materials“, grant numbers 315451, 326426, 315452. The EBSD work made use of Tampere Microscopy Center facilities at Tampere University. Publisher Copyright: © 2023 The Authors

PY - 2023

Y1 - 2023

N2 - Alumina (Al2O3) remains one the most important engineering ceramic for industrial applications. In addition to the α phase, transition alumina phases have interesting characteristics. Controlling the obtained phase structure from alumina melt requires processes with extreme cooling rates and therefore limits the tailoring capabilities. This study investigates how the cooling rate of pure alumina affects its microstructural properties and phase structure in plasma-based processing. The paper reports phase changes in micron sized granulated alumina particles in high-temperature plasma spheroidization and compares the results to plasma sprayed alumina coatings. Both plasma processes involve melting of the material followed by subsequent rapid cooling. Direct comparison on the alumina phase transitions is obtained for the two methodically distinct processing routes, creating unique microstructures due to difference in their cooling rates.

AB - Alumina (Al2O3) remains one the most important engineering ceramic for industrial applications. In addition to the α phase, transition alumina phases have interesting characteristics. Controlling the obtained phase structure from alumina melt requires processes with extreme cooling rates and therefore limits the tailoring capabilities. This study investigates how the cooling rate of pure alumina affects its microstructural properties and phase structure in plasma-based processing. The paper reports phase changes in micron sized granulated alumina particles in high-temperature plasma spheroidization and compares the results to plasma sprayed alumina coatings. Both plasma processes involve melting of the material followed by subsequent rapid cooling. Direct comparison on the alumina phase transitions is obtained for the two methodically distinct processing routes, creating unique microstructures due to difference in their cooling rates.

KW - AlO (D)

KW - Electron microscopy (B)

KW - Powders: solid state reaction (A)

KW - Transition phases

KW - X-ray methods (B)

UR - http://www.scopus.com/inward/record.url?scp=85151351731&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2023.03.263

DO - 10.1016/j.ceramint.2023.03.263

M3 - Article

AN - SCOPUS:85151351731

SN - 0272-8842

VL - 49

SP - 21346

EP - 21354

JO - Ceramics International

JF - Ceramics International

IS - 13

ER -

Evolution of alumina phase structure in thermal plasma processing

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