Univ. of California, Irvine, CA (United States). Dept. of Materials Science and Engineering; Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Material, Physical, and Chemical Sciences
Univ. of California, Irvine, CA (United States). Dept. of Materials Science and Engineering
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Material, Physical, and Chemical Sciences
Nanocrystalline metals are promising radiation tolerant materials due to their large interfacial volume fraction, but irradiation-induced grain growth can eventually degrade any improvement in radiation tolerance. Therefore, methods to limit grain growth and simultaneously improve the radiation tolerance of nanocrystalline metals are needed. Amorphous intergranular films are unique grain boundary structures that are predicted to have improved sink efficiencies due to their increased thickness and amorphous structure, while also improving grain size stability. Here, ball milled nanocrystalline Cu-Zr alloys are heat treated to either have only ordered grain boundaries or to contain amorphous intergranular films distributed within the grain boundary network, and are then subjected to in situ transmission electron microscopy irradiation and ex situ irradiation. Differences in defect density and grain growth due to grain boundary complexion type are then investigated. When amorphous intergranular films are incorporated within the material, fewer and smaller defect clusters are observed while grain growth is also limited, leading to nanocrystalline alloys with improved radiation tolerance.
Schuler, Jennifer D., et al. "Amorphous intergranular films mitigate radiation damage in nanocrystalline Cu-Zr." Acta Materialia, vol. 186, Jan. 2020. https://doi.org/10.1016/j.actamat.2019.12.048
Schuler, Jennifer D., Grigorian, Charlette M., Barr, Christopher M., Boyce, Brad L., Hattar, Khalid, & Rupert, Timothy J. (2020). Amorphous intergranular films mitigate radiation damage in nanocrystalline Cu-Zr. Acta Materialia, 186. https://doi.org/10.1016/j.actamat.2019.12.048
Schuler, Jennifer D., Grigorian, Charlette M., Barr, Christopher M., et al., "Amorphous intergranular films mitigate radiation damage in nanocrystalline Cu-Zr," Acta Materialia 186 (2020), https://doi.org/10.1016/j.actamat.2019.12.048
@article{osti_1650164,
author = {Schuler, Jennifer D. and Grigorian, Charlette M. and Barr, Christopher M. and Boyce, Brad L. and Hattar, Khalid and Rupert, Timothy J.},
title = {Amorphous intergranular films mitigate radiation damage in nanocrystalline Cu-Zr},
annote = {Nanocrystalline metals are promising radiation tolerant materials due to their large interfacial volume fraction, but irradiation-induced grain growth can eventually degrade any improvement in radiation tolerance. Therefore, methods to limit grain growth and simultaneously improve the radiation tolerance of nanocrystalline metals are needed. Amorphous intergranular films are unique grain boundary structures that are predicted to have improved sink efficiencies due to their increased thickness and amorphous structure, while also improving grain size stability. Here, ball milled nanocrystalline Cu-Zr alloys are heat treated to either have only ordered grain boundaries or to contain amorphous intergranular films distributed within the grain boundary network, and are then subjected to in situ transmission electron microscopy irradiation and ex situ irradiation. Differences in defect density and grain growth due to grain boundary complexion type are then investigated. When amorphous intergranular films are incorporated within the material, fewer and smaller defect clusters are observed while grain growth is also limited, leading to nanocrystalline alloys with improved radiation tolerance.},
doi = {10.1016/j.actamat.2019.12.048},
url = {https://www.osti.gov/biblio/1650164},
journal = {Acta Materialia},
issn = {ISSN 1359-6454},
volume = {186},
place = {United States},
publisher = {Elsevier},
year = {2020},
month = {01}}
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS)
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 261, Issue 1-2https://doi.org/10.1016/j.nimb.2007.03.098
Ziegler, James F.; Ziegler, M. D.; Biersack, J. P.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12https://doi.org/10.1016/j.nimb.2010.02.091