Research output: Contribution to journal › Article › peer-review
Structural transformations of a gas-atomized al62.5cu25fe12.5 alloy during detonation spraying, spark plasma sintering and hot pressing. / Batraev, Igor S.; Wolf, Witor; Bokhonov, Boris B. et al.
In: Science of Sintering, Vol. 53, No. 3, 2021, p. 379-386.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Structural transformations of a gas-atomized al62.5cu25fe12.5 alloy during detonation spraying, spark plasma sintering and hot pressing
AU - Batraev, Igor S.
AU - Wolf, Witor
AU - Bokhonov, Boris B.
AU - Ukhina, Arina V.
AU - Kuchumova, Ivanna D.
AU - Pal, Amit Kumar
AU - Bataev, Ivan A.
AU - Ulianitsky, Vladimir Yu
AU - Dudina, Dina V.
AU - Botta, Walter José
AU - Jorge, Alberto Moreira
N1 - Funding Information: This work was supported by the Ministry of Science and Higher Education of the Russian Federation. Publisher Copyright: © 2021 Authors. Published by association for ETRAN Society.
PY - 2021
Y1 - 2021
N2 - In this work, we traced structural transformations of an Al62.5Cu25Fe12.5 alloy, in which a quasicrystalline icosahedral phase (i-phase) can be formed, upon spraying onto a substrate and consolidation from the powder into the bulk state. The Al62.5Cu25Fe12.5 powder was obtained by gas atomization and consisted of i-phase and τ-phase AlCu(Fe). The powder was detonation sprayed (DS) and consolidated by spark plasma sintering (SPS)/hot pressing (HP). During DS, the particles experienced partial or complete melting and rapid solidification, which resulted in the formation of coatings of a complex structure. The composite regions containing i-phase were inherited from the powder alloy. The fraction of the material that experienced melting solidified as β-phase AlFe(Cu) in the coating. It was suggested that the difficulty of obtaining i-phase upon post-spray annealing is related to aluminum depletion of the alloy during DS. During SPS and HP, the elemental composition of the alloy was preserved, while the exposure to an elevated temperature led to phase homogenization. SPS and HP conducted at 700ºC resulted in full densification and the formation of a single-phase quasicrystalline alloy. The sintered single-phase alloy showed a higher microhardness in comparison with the DS coatings.
AB - In this work, we traced structural transformations of an Al62.5Cu25Fe12.5 alloy, in which a quasicrystalline icosahedral phase (i-phase) can be formed, upon spraying onto a substrate and consolidation from the powder into the bulk state. The Al62.5Cu25Fe12.5 powder was obtained by gas atomization and consisted of i-phase and τ-phase AlCu(Fe). The powder was detonation sprayed (DS) and consolidated by spark plasma sintering (SPS)/hot pressing (HP). During DS, the particles experienced partial or complete melting and rapid solidification, which resulted in the formation of coatings of a complex structure. The composite regions containing i-phase were inherited from the powder alloy. The fraction of the material that experienced melting solidified as β-phase AlFe(Cu) in the coating. It was suggested that the difficulty of obtaining i-phase upon post-spray annealing is related to aluminum depletion of the alloy during DS. During SPS and HP, the elemental composition of the alloy was preserved, while the exposure to an elevated temperature led to phase homogenization. SPS and HP conducted at 700ºC resulted in full densification and the formation of a single-phase quasicrystalline alloy. The sintered single-phase alloy showed a higher microhardness in comparison with the DS coatings.
KW - Detonation spraying
KW - Microstructure
KW - Quasicrystalline alloy
KW - Spark plasma sintering
UR - http://www.scopus.com/inward/record.url?scp=85117296290&partnerID=8YFLogxK
U2 - 10.2298/SOS2103379B
DO - 10.2298/SOS2103379B
M3 - Article
AN - SCOPUS:85117296290
VL - 53
SP - 379
EP - 386
JO - Science of Sintering
JF - Science of Sintering
SN - 0350-820X
IS - 3
ER -
ID: 34599978