Intermetallic formation and interdiffusion in diffusion couples made of uranium and single crystal iron

Tianyi Chen; Travis A. Smith; Jonathan G. Gigax; Di Chen; Robert Balerio; Lin Shao; Bulent H. Sencer; J. Rory Kennedy

doi:10.1016/j.jnucmat.2015.05.026

Intermetallic formation and interdiffusion in diffusion couples made of uranium and single crystal iron

Tianyi Chen
, Travis A. Smith
, Jonathan G. Gigax
, Di Chen
, Robert Balerio
, Lin Shao
, Bulent H. Sencer
, J. Rory Kennedy

Nuclear Materials Performance

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

8 Scopus citations

Abstract

We studied the interfacial phase formation and diffusion kinetics in uranium-iron diffusion couples. A comparison was made between polycrystalline uranium (U) bonded with polycrystalline iron (Fe^P) and polycrystalline uranium bonded with single crystalline Fe (Fe^SC). After thermal annealing at 575 °C, 600 °C, 625 °C and 650 °C, respectively, diffusion and microstructures at the interface were characterized by scanning electron microscopy and transmission electron miscopy. The presence of grain boundaries in iron has a significant influence on interface reactions. In comparison with U-Fe^P system, interdiffusion coefficients of the U-Fe^SC system are significantly lower and were governed by much higher activation energies. Integrated interdiffusion coefficients and intrinsic diffusion coefficients were obtained. The intrinsic diffusion coefficients show faster diffusion of iron atoms in both U₆Fe and UFe₂ intermetallic phases than uranium.

Original language	English
Article number	49106
Pages (from-to)	82-88
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	467
DOIs	https://doi.org/10.1016/j.jnucmat.2015.05.026
State	Published - Dec 1 2015

Keywords

FCCI
Grain boundaries
Interdiffusion coefficients
Intermetallic
Intrinsic diffusion coefficients
Kirkendall interface

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10.1016/j.jnucmat.2015.05.026

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@article{cad9f1a27ace481aa75207e244ea826a,

title = "Intermetallic formation and interdiffusion in diffusion couples made of uranium and single crystal iron",

abstract = "We studied the interfacial phase formation and diffusion kinetics in uranium-iron diffusion couples. A comparison was made between polycrystalline uranium (U) bonded with polycrystalline iron (FeP) and polycrystalline uranium bonded with single crystalline Fe (FeSC). After thermal annealing at 575 °C, 600 °C, 625 °C and 650 °C, respectively, diffusion and microstructures at the interface were characterized by scanning electron microscopy and transmission electron miscopy. The presence of grain boundaries in iron has a significant influence on interface reactions. In comparison with U-FeP system, interdiffusion coefficients of the U-FeSC system are significantly lower and were governed by much higher activation energies. Integrated interdiffusion coefficients and intrinsic diffusion coefficients were obtained. The intrinsic diffusion coefficients show faster diffusion of iron atoms in both U6Fe and UFe2 intermetallic phases than uranium.",

keywords = "FCCI, Grain boundaries, Interdiffusion coefficients, Intermetallic, Intrinsic diffusion coefficients, Kirkendall interface",

author = "Tianyi Chen and Smith, \{Travis A.\} and Gigax, \{Jonathan G.\} and Di Chen and Robert Balerio and Lin Shao and Sencer, \{Bulent H.\} and Kennedy, \{J. Rory\}",

note = "Funding Information: This work was supported by the US Department of Energy under DOE-NE Idaho Operations Office Contract DE-AC07-05ID14517 . The authors would like to thank Advanced Test Reactor – National Scientific User Facility (ATR-NSUF) and the Center for Advanced Energy Studies – Microscopy and Characterization Suite (CAES-MaCS) for the RTE award using CAES-MaCS facility. Publisher Copyright: {\textcopyright} 2015 Published by Elsevier B.V.",

year = "2015",

month = dec,

day = "1",

doi = "10.1016/j.jnucmat.2015.05.026",

language = "English",

volume = "467",

pages = "82--88",

journal = "Journal of Nuclear Materials",

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TY - JOUR

T1 - Intermetallic formation and interdiffusion in diffusion couples made of uranium and single crystal iron

AU - Chen, Tianyi

AU - Smith, Travis A.

AU - Gigax, Jonathan G.

AU - Chen, Di

AU - Balerio, Robert

AU - Shao, Lin

AU - Sencer, Bulent H.

AU - Kennedy, J. Rory

N1 - Funding Information: This work was supported by the US Department of Energy under DOE-NE Idaho Operations Office Contract DE-AC07-05ID14517 . The authors would like to thank Advanced Test Reactor – National Scientific User Facility (ATR-NSUF) and the Center for Advanced Energy Studies – Microscopy and Characterization Suite (CAES-MaCS) for the RTE award using CAES-MaCS facility. Publisher Copyright: © 2015 Published by Elsevier B.V.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - We studied the interfacial phase formation and diffusion kinetics in uranium-iron diffusion couples. A comparison was made between polycrystalline uranium (U) bonded with polycrystalline iron (FeP) and polycrystalline uranium bonded with single crystalline Fe (FeSC). After thermal annealing at 575 °C, 600 °C, 625 °C and 650 °C, respectively, diffusion and microstructures at the interface were characterized by scanning electron microscopy and transmission electron miscopy. The presence of grain boundaries in iron has a significant influence on interface reactions. In comparison with U-FeP system, interdiffusion coefficients of the U-FeSC system are significantly lower and were governed by much higher activation energies. Integrated interdiffusion coefficients and intrinsic diffusion coefficients were obtained. The intrinsic diffusion coefficients show faster diffusion of iron atoms in both U6Fe and UFe2 intermetallic phases than uranium.

AB - We studied the interfacial phase formation and diffusion kinetics in uranium-iron diffusion couples. A comparison was made between polycrystalline uranium (U) bonded with polycrystalline iron (FeP) and polycrystalline uranium bonded with single crystalline Fe (FeSC). After thermal annealing at 575 °C, 600 °C, 625 °C and 650 °C, respectively, diffusion and microstructures at the interface were characterized by scanning electron microscopy and transmission electron miscopy. The presence of grain boundaries in iron has a significant influence on interface reactions. In comparison with U-FeP system, interdiffusion coefficients of the U-FeSC system are significantly lower and were governed by much higher activation energies. Integrated interdiffusion coefficients and intrinsic diffusion coefficients were obtained. The intrinsic diffusion coefficients show faster diffusion of iron atoms in both U6Fe and UFe2 intermetallic phases than uranium.

KW - FCCI

KW - Grain boundaries

KW - Interdiffusion coefficients

KW - Intermetallic

KW - Intrinsic diffusion coefficients

KW - Kirkendall interface

UR - https://www.scopus.com/pages/publications/84941899703

U2 - 10.1016/j.jnucmat.2015.05.026

DO - 10.1016/j.jnucmat.2015.05.026

M3 - Article

AN - SCOPUS:84941899703

SN - 0022-3115

VL - 467

SP - 82

EP - 88

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 49106

ER -

Intermetallic formation and interdiffusion in diffusion couples made of uranium and single crystal iron

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Keywords

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