High corrosion resistance of La1 . 4Fe11Co0 . 8Si1.2 magnetocaloric alloy

Z. H. Liao; X. C. Zhong; X. Huang; Z. Y. Hao; J. H. Huang; C. L. Liu; Y. D. Zhang; L. Ma; D. L. Jiao; Z. W. Liu; W. Q. Qiu; R. V. Ramanujan

doi:10.1016/j.matchemphys.2024.129000

High corrosion resistance of La₁ _. ₄Fe₁₁Co₀ _. ₈Si_1.2 magnetocaloric alloy

Z. H. Liao, X. C. Zhong^*, X. Huang, Z. Y. Hao, J. H. Huang, C. L. Liu, Y. D. Zhang, L. Ma, D. L. Jiao, Z. W. Liu, W. Q. Qiu, R. V. Ramanujan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The microstructure, phase constitution and corrosion behavior of non-stoichiometric La_xFe₁₁Co₀ _. ₈Si_1.2 (x = 1.0, 1.2, 1.4, 1.6) magnetocaloric alloys were investigated. Annealed La_xFe₁₁Co₀ _. ₈Si_1.2 compounds, containing the desired NaZn₁₃-type matrix phase (1:13 phase), as well as a small α-Fe and La-rich phase content, exhibited high micro-galvanic corrosion in deionized water. The size of the La-rich phase in the La_xFe₁₁Co₀ _. ₈Si_1.2 alloys varied with the La content. The refined La-rich phase in the La₁ _. ₄Fe₁₁Co₀ _. ₈Si_1.2 alloy led to reduced galvanic corrosion and a more protective corrosion layer. Due to the internal stress of the corrosion product, the corrosion product of the coarse La-rich phase in the La₁ _. ₆Fe₁₁Co₀ _. ₈Si_1.2 alloy easily cracked, leading to higher corrosion. Among these alloys, the La₁ _. ₄Fe₁₁Co₀ _. ₈Si_1.2 alloy with a high content of the 1:13 phase and a small finer La-rich phase content, exhibited strong corrosion resistance.

Original language	English
Article number	129000
Journal	Materials Chemistry and Physics
Volume	315
DOIs	https://doi.org/10.1016/j.matchemphys.2024.129000
Publication status	Published - Mar 1 2024
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics

Keywords

Corrosion
Magnetocaloric material
Nonstoichiometric La(Fe,Si)-based alloys
Rare earths

Access to Document

10.1016/j.matchemphys.2024.129000

Cite this

@article{d80ba24d0a2549b1998f99428e91191c,

title = "High corrosion resistance of La1 . 4Fe11Co0 . 8Si1.2 magnetocaloric alloy",

abstract = "The microstructure, phase constitution and corrosion behavior of non-stoichiometric LaxFe11Co0 . 8Si1.2 (x = 1.0, 1.2, 1.4, 1.6) magnetocaloric alloys were investigated. Annealed LaxFe11Co0 . 8Si1.2 compounds, containing the desired NaZn13-type matrix phase (1:13 phase), as well as a small α-Fe and La-rich phase content, exhibited high micro-galvanic corrosion in deionized water. The size of the La-rich phase in the LaxFe11Co0 . 8Si1.2 alloys varied with the La content. The refined La-rich phase in the La1 . 4Fe11Co0 . 8Si1.2 alloy led to reduced galvanic corrosion and a more protective corrosion layer. Due to the internal stress of the corrosion product, the corrosion product of the coarse La-rich phase in the La1 . 6Fe11Co0 . 8Si1.2 alloy easily cracked, leading to higher corrosion. Among these alloys, the La1 . 4Fe11Co0 . 8Si1.2 alloy with a high content of the 1:13 phase and a small finer La-rich phase content, exhibited strong corrosion resistance.",

keywords = "Corrosion, Magnetocaloric material, Nonstoichiometric La(Fe,Si)-based alloys, Rare earths",

author = "Liao, {Z. H.} and Zhong, {X. C.} and X. Huang and Hao, {Z. Y.} and Huang, {J. H.} and Liu, {C. L.} and Zhang, {Y. D.} and L. Ma and Jiao, {D. L.} and Liu, {Z. W.} and Qiu, {W. Q.} and Ramanujan, {R. V.}",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier B.V.",

year = "2024",

month = mar,

day = "1",

doi = "10.1016/j.matchemphys.2024.129000",

language = "English",

volume = "315",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier BV",

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TY - JOUR

T1 - High corrosion resistance of La1 . 4Fe11Co0 . 8Si1.2 magnetocaloric alloy

AU - Liao, Z. H.

AU - Zhong, X. C.

AU - Huang, X.

AU - Hao, Z. Y.

AU - Huang, J. H.

AU - Liu, C. L.

AU - Zhang, Y. D.

AU - Ma, L.

AU - Jiao, D. L.

AU - Liu, Z. W.

AU - Qiu, W. Q.

AU - Ramanujan, R. V.

PY - 2024/3/1

Y1 - 2024/3/1

N2 - The microstructure, phase constitution and corrosion behavior of non-stoichiometric LaxFe11Co0 . 8Si1.2 (x = 1.0, 1.2, 1.4, 1.6) magnetocaloric alloys were investigated. Annealed LaxFe11Co0 . 8Si1.2 compounds, containing the desired NaZn13-type matrix phase (1:13 phase), as well as a small α-Fe and La-rich phase content, exhibited high micro-galvanic corrosion in deionized water. The size of the La-rich phase in the LaxFe11Co0 . 8Si1.2 alloys varied with the La content. The refined La-rich phase in the La1 . 4Fe11Co0 . 8Si1.2 alloy led to reduced galvanic corrosion and a more protective corrosion layer. Due to the internal stress of the corrosion product, the corrosion product of the coarse La-rich phase in the La1 . 6Fe11Co0 . 8Si1.2 alloy easily cracked, leading to higher corrosion. Among these alloys, the La1 . 4Fe11Co0 . 8Si1.2 alloy with a high content of the 1:13 phase and a small finer La-rich phase content, exhibited strong corrosion resistance.

AB - The microstructure, phase constitution and corrosion behavior of non-stoichiometric LaxFe11Co0 . 8Si1.2 (x = 1.0, 1.2, 1.4, 1.6) magnetocaloric alloys were investigated. Annealed LaxFe11Co0 . 8Si1.2 compounds, containing the desired NaZn13-type matrix phase (1:13 phase), as well as a small α-Fe and La-rich phase content, exhibited high micro-galvanic corrosion in deionized water. The size of the La-rich phase in the LaxFe11Co0 . 8Si1.2 alloys varied with the La content. The refined La-rich phase in the La1 . 4Fe11Co0 . 8Si1.2 alloy led to reduced galvanic corrosion and a more protective corrosion layer. Due to the internal stress of the corrosion product, the corrosion product of the coarse La-rich phase in the La1 . 6Fe11Co0 . 8Si1.2 alloy easily cracked, leading to higher corrosion. Among these alloys, the La1 . 4Fe11Co0 . 8Si1.2 alloy with a high content of the 1:13 phase and a small finer La-rich phase content, exhibited strong corrosion resistance.

KW - Corrosion

KW - Magnetocaloric material

KW - Nonstoichiometric La(Fe,Si)-based alloys

KW - Rare earths

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