In situ observation of defect annihilation in Kr ion-irradiated bulk Fe/amorphous-Fe2Zr nanocomposite alloy

K. Y. Yu; Z. Fan; Y. Chen; M. Song; Y. Liu; H. Wang; M. A. Kirk; M. Li; X. Zhang

doi:10.1080/21663831.2014.951494

In situ observation of defect annihilation in Kr ion-irradiated bulk Fe/amorphous-Fe₂Zr nanocomposite alloy

K. Y. Yu
, Z. Fan
, Y. Chen
, M. Song
, Y. Liu
, H. Wang
, M. A. Kirk
, M. Li
, X. Zhang

Chemical Engineering and Materials Science

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

19 Scopus citations

Abstract

Enhanced irradiation tolerance in crystalline multilayers has received significant attention lately. However, little is known on the irradiation response of crystal/amorphous nanolayers.We report on in situ Kr ion irradiation studies of a bulk Fe₉₆Zr₄ nanocomposite alloy. Irradiation resulted in amorphization of Fe₂Zr and formed crystal/amorphous nanolayers. α-Fe layers exhibited drastically lower defect density and size than those in large α-Fe grains. In situ video revealed that mobile dislocation loops in α-Fe layers were confined by the crystal/amorphous interfaces and kept migrating to annihilate other defects. This study provides new insights on the design of irradiation-tolerant crystal/amorphous nanocomposites.

Original language	English (US)
Pages (from-to)	35-42
Number of pages	8
Journal	Materials Research Letters
Volume	3
Issue number	1
DOIs	https://doi.org/10.1080/21663831.2014.951494
State	Published - Aug 26 2014

Bibliographical note

Publisher Copyright:
© 2014 The Author(s). Published by Taylor & Francis.

Keywords

Absorption
Annihilation
Defect cluster
Heavy ion irradiation

Publisher link

10.1080/21663831.2014.951494

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title = "In situ observation of defect annihilation in Kr ion-irradiated bulk Fe/amorphous-Fe2Zr nanocomposite alloy",

abstract = "Enhanced irradiation tolerance in crystalline multilayers has received significant attention lately. However, little is known on the irradiation response of crystal/amorphous nanolayers.We report on in situ Kr ion irradiation studies of a bulk Fe96Zr4 nanocomposite alloy. Irradiation resulted in amorphization of Fe2Zr and formed crystal/amorphous nanolayers. α-Fe layers exhibited drastically lower defect density and size than those in large α-Fe grains. In situ video revealed that mobile dislocation loops in α-Fe layers were confined by the crystal/amorphous interfaces and kept migrating to annihilate other defects. This study provides new insights on the design of irradiation-tolerant crystal/amorphous nanocomposites.",

keywords = "Absorption, Annihilation, Defect cluster, Heavy ion irradiation",

author = "Yu, \{K. Y.\} and Z. Fan and Y. Chen and M. Song and Y. Liu and H. Wang and Kirk, \{M. A.\} and M. Li and X. Zhang",

note = "Publisher Copyright: {\textcopyright} 2014 The Author(s). Published by Taylor \& Francis.",

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T1 - In situ observation of defect annihilation in Kr ion-irradiated bulk Fe/amorphous-Fe2Zr nanocomposite alloy

AU - Yu, K. Y.

AU - Fan, Z.

AU - Chen, Y.

AU - Song, M.

AU - Liu, Y.

AU - Wang, H.

AU - Kirk, M. A.

AU - Li, M.

AU - Zhang, X.

PY - 2014/8/26

Y1 - 2014/8/26

N2 - Enhanced irradiation tolerance in crystalline multilayers has received significant attention lately. However, little is known on the irradiation response of crystal/amorphous nanolayers.We report on in situ Kr ion irradiation studies of a bulk Fe96Zr4 nanocomposite alloy. Irradiation resulted in amorphization of Fe2Zr and formed crystal/amorphous nanolayers. α-Fe layers exhibited drastically lower defect density and size than those in large α-Fe grains. In situ video revealed that mobile dislocation loops in α-Fe layers were confined by the crystal/amorphous interfaces and kept migrating to annihilate other defects. This study provides new insights on the design of irradiation-tolerant crystal/amorphous nanocomposites.

AB - Enhanced irradiation tolerance in crystalline multilayers has received significant attention lately. However, little is known on the irradiation response of crystal/amorphous nanolayers.We report on in situ Kr ion irradiation studies of a bulk Fe96Zr4 nanocomposite alloy. Irradiation resulted in amorphization of Fe2Zr and formed crystal/amorphous nanolayers. α-Fe layers exhibited drastically lower defect density and size than those in large α-Fe grains. In situ video revealed that mobile dislocation loops in α-Fe layers were confined by the crystal/amorphous interfaces and kept migrating to annihilate other defects. This study provides new insights on the design of irradiation-tolerant crystal/amorphous nanocomposites.

KW - Absorption

KW - Annihilation

KW - Defect cluster

KW - Heavy ion irradiation

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