@article{0f46cbdf11e74275966ba84ab8fcb3e7,
title = "Hybrid diffusive-displacive helium outgassing in Cu/Nb multilayer composites",
abstract = "Gas generation degrades material properties in nuclear applications. The construction of self-assembled bubble channels was proposed to help release gas to the surface. In this study, thermal desorption spectroscopy, in-situ TEM heating and molecular dynamics simulations were carried out to assess the outgassing feasibility in helium-irradiated Cu/Nb multilayers with low structural damage. We found that the formation of outgassing networks has a hybrid diffusive-displacive nature, with diffusive bubble coalescence and crack-induced displacive fracture. The latter could destroy the integrity of the multilayer structure. This suggests that the outgassing strategy making use of self-assembled cavity networks should be carefully designed to avoid large-scale structural failure.",
author = "Rui Gao and Miaomiao Jin and Li, {Qing Jie} and So, {Kang Pyo} and Lifeng Zhang and Xianping Wang and Qianfeng Fang and Cheng Sun and Lin Shao and Ju Li",
note = "Funding Information: This work was supported by Eni S.p.A. through the MIT Energy Initiative, and the US DOE Office of Nuclear Energy's NEUP Program under Grant No. DE-NE0008827. We thank Dr. Wayne Kinnison for performing the helium ion irradiation experiments at Texas A&M University. We also thank Dr. Yueqing Yang for assisting the in-situ heating experiment. This research made use of Idaho National Laboratory computing resources which are supported by the Office of Nuclear Energy of the U.S. Department of Energy and the Nuclear Science User Facilities under Contract No. DE-AC07-05ID14517. Also, R.G. L-F.Z. X-P.W. and Q-F.F. acknowledge support by the National Natural Science Foundation of China (Grant Nos. 12005256, U1967211, 51771181, 51801194, 51971212), and the Anhui Provincial Natural Science Foundation (Grant No. 1908085QA42). Funding Information: This work was supported by Eni S.p.A. through the MIT Energy Initiative, and the US DOE Office of Nuclear Energy's NEUP Program under Grant No. DE-NE0008827 . We thank Dr. Wayne Kinnison for performing the helium ion irradiation experiments at Texas A&M University. We also thank Dr. Yueqing Yang for assisting the in-situ heating experiment. This research made use of Idaho National Laboratory computing resources which are supported by the Office of Nuclear Energy of the U.S. Department of Energy and the Nuclear Science User Facilities under Contract No. DE-AC07-05ID14517 . Also, R.G., L-F.Z., X-P.W. and Q-F.F. acknowledge support by the National Natural Science Foundation of China (Grant Nos. 12005256 , U1967211 , 51771181 , 51801194 , 51971212 ), and the Anhui Provincial Natural Science Foundation (Grant No. 1908085QA42 ) . Publisher Copyright: {\textcopyright} 2020",
year = "2021",
month = mar,
day = "15",
doi = "10.1016/j.scriptamat.2020.113706",
language = "English (US)",
volume = "194",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier Limited",
}