TY - JOUR
T1 - Cavity evolution at grain boundaries as a function of radiation damage and thermal conditions in nanocrystalline nickel
AU - Muntifering, Brittany
AU - Blair, Sarah Jane
AU - Gong, Cajer
AU - Dunn, Aaron
AU - Dingreville, Remi
AU - Qu, Jianmin
AU - Hattar, Khalid
N1 - Publisher Copyright:
© 2015 The Author(s). Published by Taylor & Francis.
PY - 2016
Y1 - 2016
N2 - Enhanced radiation tolerance of nanostructured metals is attributed to the high density of interfaces that can absorb radiationinduced defects. Here, cavity evolution mechanisms during cascade damage, helium implantation, and annealing of nanocrystalline nickel are characterized via in situ transmission electron microscopy (TEM). Films subjected to self-ion irradiation followed by helium implantation developed evenly distributed cavity structures, whereas films exposed in the reversed order developed cavities preferentially distributed along grain boundaries. Post-irradiation annealing and orientation mapping demonstrated uniform cavity growth in the nanocrystalline structure, and cavities spanning multiple grains. These mechanisms suggest limited ability to reduce swelling, despite the stability of the nanostructure.
AB - Enhanced radiation tolerance of nanostructured metals is attributed to the high density of interfaces that can absorb radiationinduced defects. Here, cavity evolution mechanisms during cascade damage, helium implantation, and annealing of nanocrystalline nickel are characterized via in situ transmission electron microscopy (TEM). Films subjected to self-ion irradiation followed by helium implantation developed evenly distributed cavity structures, whereas films exposed in the reversed order developed cavities preferentially distributed along grain boundaries. Post-irradiation annealing and orientation mapping demonstrated uniform cavity growth in the nanocrystalline structure, and cavities spanning multiple grains. These mechanisms suggest limited ability to reduce swelling, despite the stability of the nanostructure.
KW - Cavity evolution
KW - Helium implantation
KW - In situ TEM
KW - Nanocrystalline nickel
KW - Radiation
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U2 - 10.1080/21663831.2015.1121165
DO - 10.1080/21663831.2015.1121165
M3 - Article
AN - SCOPUS:85009250523
VL - 4
SP - 96
EP - 103
JO - Materials Research Letters
JF - Materials Research Letters
IS - 2
ER -