Evolution of alumina phase structure in thermal plasma processing
Year of publication
2023
Authors
Kaunisto, Kimmo; Lagerbom, Juha; Honkanen, Mari; Varis, Tommi; Lambai, Aloshious; Mohanty, Gaurav; Levänen, Erkki; Kivikytö-Reponen, Päivi; Frankberg, Erkka
Abstract
<p>Alumina (Al<sub>2</sub>O<sub>3</sub>) 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.</p>
Show moreOrganizations and authors
VTT Technical Research Centre of Finland Ltd
Lagerbom Juha
Kaunisto Kimmo
Honkanen Mari
Kivikytö-Reponen Päivi
Publication type
Publication format
Article
Parent publication type
Journal
Article type
Original article
Audience
ScientificPeer-reviewed
Peer-ReviewedMINEDU's publication type classification code
A1 Journal article (refereed), original researchPublication channel information
Journal
Volume
49
Issue
13
Pages
21346-21354
ISSN
Publication forum
Publication forum level
1
Open access
Open access in the publisher’s service
Yes
Open access of publication channel
Partially open publication channel
License of the publisher’s version
CC BY
Self-archived
Yes
Other information
Fields of science
Materials engineering
Keywords
[object Object],[object Object],[object Object],[object Object],[object Object]
Internationality of the publisher
International
Language
English
International co-publication
No
Co-publication with a company
No
DOI
10.1016/j.ceramint.2023.03.263
The publication is included in the Ministry of Education and Culture’s Publication data collection
Yes