Formation of tetragonal gas bubble superlattice in bulk molybdenum under helium ion implantation

SCRIPTA MATERIALIA

卷:149

Article

Sun, C.¹  Sprouster, D. J.²  Hattar, K.³  Ecker, L. E.²  He, L.¹  Gao, Y.¹  Zhang, Y.¹  Gan, J.¹ 

[1] Idaho Natl Lab, Idaho Falls, ID 83415 USA

[2] Brookhaven Natl Lab, Uptown, NY 11973 USA

[3] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA

关键词: Gas bubble superlattice;    Helium ion implantation;    Molybdenum;    Transmission electron microscopy;    Synchrotron small-angle x-ray scattering;   

DOI  :  10.1016/j.scriptamat.2018.01.023

来源: Elsevier

【 摘 要 】

We report the formation of tetragonal gas bubble superlattice in bulk molybdenum under helium ion implantation at 573 K. The transmission electron microscopy study shows that the helium bubble lattice constant measured from the in-plane d-spacing is similar to 4.5 nm, while it is similar to 3.9 nm from the out-of-plane measurement. The results of synchrotron-based small-angle x-ray scattering agree well with the transmission electron microscopy results in terms of the measurement of bubble lattice constant and bubble size. The coupling of transmission electron microscopy and synchrotron high-energy X-ray scattering provides an effective approach to study defect superlattices in irradiated materials. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free