In situ study on enhanced heavy ion irradiation tolerance of porous Mg

Jin Li; Y. Chen; H. Wang; X. Zhang

doi:10.1016/j.scriptamat.2017.09.018

In situ study on enhanced heavy ion irradiation tolerance of porous Mg

Jin Li, Y. Chen, H. Wang, X. Zhang

Chemical Engineering and Materials Science

Research output: Contribution to journal › Comment/debate › peer-review

16 Scopus citations

Abstract

Mg is known to be highly vulnerable to irradiation damage. Here we show, via in situ Kr ion irradiation studies inside a transmission electron microscope, that both defect density and size have been reduced substantially in porous Mg compared to dense coarse-grained Mg counterpart. Both prism and basal dislocation loops form at low dose in coarse-grained Mg, but basal loops dominate at a higher dose level. Meanwhile, in irradiated porous Mg, basal loops prevail throughout the entire irradiation process. Mechanisms that lead to enhanced irradiation tolerance of porous Mg are discussed.

Original language	English (US)
Pages (from-to)	13-17
Number of pages	5
Journal	Scripta Materialia
Volume	144
DOIs	https://doi.org/10.1016/j.scriptamat.2017.09.018
State	Published - Feb 2018

Bibliographical note

Funding Information:
We acknowledge financial support by NSF-CMMI under grant no. 1728419 . HW acknowledges the support from the U.S. Office of Naval Research ( N00014-16-1-2778 ). We also acknowledge the use of microscopes at the Purdue Microscopy Center and the DoE Center for Integrated Nanotechnologies managed by Los Alamos National Laboratory. The IVEM facility at Argonne National Laboratory is supported by DOE-Office of Nuclear Energy.

Publisher Copyright:
© 2017 Acta Materialia Inc.

Keywords

Defect absorption
In situ irradiation
Irradiation tolerance
Porous materials

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title = "In situ study on enhanced heavy ion irradiation tolerance of porous Mg",

abstract = "Mg is known to be highly vulnerable to irradiation damage. Here we show, via in situ Kr ion irradiation studies inside a transmission electron microscope, that both defect density and size have been reduced substantially in porous Mg compared to dense coarse-grained Mg counterpart. Both prism and basal dislocation loops form at low dose in coarse-grained Mg, but basal loops dominate at a higher dose level. Meanwhile, in irradiated porous Mg, basal loops prevail throughout the entire irradiation process. Mechanisms that lead to enhanced irradiation tolerance of porous Mg are discussed.",

keywords = "Defect absorption, In situ irradiation, Irradiation tolerance, Porous materials",

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AU - Li, Jin

AU - Chen, Y.

AU - Wang, H.

AU - Zhang, X.

N1 - Funding Information: We acknowledge financial support by NSF-CMMI under grant no. 1728419 . HW acknowledges the support from the U.S. Office of Naval Research ( N00014-16-1-2778 ). We also acknowledge the use of microscopes at the Purdue Microscopy Center and the DoE Center for Integrated Nanotechnologies managed by Los Alamos National Laboratory. The IVEM facility at Argonne National Laboratory is supported by DOE-Office of Nuclear Energy. Publisher Copyright: © 2017 Acta Materialia Inc.

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N2 - Mg is known to be highly vulnerable to irradiation damage. Here we show, via in situ Kr ion irradiation studies inside a transmission electron microscope, that both defect density and size have been reduced substantially in porous Mg compared to dense coarse-grained Mg counterpart. Both prism and basal dislocation loops form at low dose in coarse-grained Mg, but basal loops dominate at a higher dose level. Meanwhile, in irradiated porous Mg, basal loops prevail throughout the entire irradiation process. Mechanisms that lead to enhanced irradiation tolerance of porous Mg are discussed.

AB - Mg is known to be highly vulnerable to irradiation damage. Here we show, via in situ Kr ion irradiation studies inside a transmission electron microscope, that both defect density and size have been reduced substantially in porous Mg compared to dense coarse-grained Mg counterpart. Both prism and basal dislocation loops form at low dose in coarse-grained Mg, but basal loops dominate at a higher dose level. Meanwhile, in irradiated porous Mg, basal loops prevail throughout the entire irradiation process. Mechanisms that lead to enhanced irradiation tolerance of porous Mg are discussed.

KW - Defect absorption

KW - In situ irradiation

KW - Irradiation tolerance

KW - Porous materials

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VL - 144

SP - 13

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

In situ study on enhanced heavy ion irradiation tolerance of porous Mg

Abstract

Bibliographical note

Keywords

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