Enhanced defect annihilation capability of the graphene/copper interface: An in situ study

SCRIPTA MATERIALIA

卷:203

Article

Yang, K. M.¹  Tang, P. Z.¹  Zhang, Q.¹  Ma, H. Y.¹  Liu, E. Q.¹  Li, M.²  Zhang, X.³  Li, Jin⁴  Liu, Y.¹  Fan, T. X.¹ 

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[2] Argonne Natl Lab, Nucl Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA

[3] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA

[4] Harbin Inst Technol, Inst Special Environm Phys Sci, Shenzhen 518055, Peoples R China

关键词: Metal matrix composites;    Heterostructures;    Interface defects;    Vacancies;    Simulation;   

DOI  :  10.1016/j.scriptamat.2021.114001

来源: Elsevier

【 摘 要 】

It is well known that energetic heavy ion irradiations can often induce defects and ultimately lead to material degradations. Interfaces, such as high-angle grain boundaries (HAGBs), are generally used as defect sinks for alleviating the irradiation damage. However, HAGBs are often unstable during radiation. Here we investigate the interfacial irradiation responses of the graphene (Gr)/Cu composites by using in situ Kr ++ ions irradiation under transmission electron microscopy. The results revealed that the Gr/Cu interface exhibits higher defect annihilation capability compared to the HAGBs in Cu. Moreover, the atomistic simulations suggested a slightly higher and larger range of stress field for the Gr/Cu interface, which contributes to the enhanced defects absorption capability. The present findings are essential to understand and design a new class of carbon/metal composites with superior irradiation tolerance. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free