Enhanced mechanical property and radiation resistance of reduced graphene oxide/tungsten composite with nacre-like architecture. (1st August 2020)

• Record Type: Journal Article
• Authors: He, Lanli; Si, Shuyao; Xu, Hang; Tang, Chongyang; Liu, Jiangchao; Dong, Shilian; Jiang, Changzhong; Xiao, Xiangheng
• Is Part Of: Composite structures. Volume 245(2020)
• Publication Date: 2020-08-01
• Subjects: Graphene -- Tungsten matrix composites -- Nacre-like architecture -- Hardening -- Radiation resistance; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2020.112361
• Languages: English
• ISSNs: 0263-8223

Abstract

Highlights: RGO/W composite with nacre-like architecture was newly designed. Hardness of RGO/W composite was enhanced by 76% due to RGO addition. RGO/W composite exhibited lower hardening rate (18.6%) than its counterparts. Mass production of RGO/W composite was realized. Abstract: Nuclear materials combining excellent mechanical property and radiation resistance are highly demanded. Here, inspired natural nacre, we fabricated reduced graphene oxide/tungsten composite (RGO/W) with laminated structure by powder metallurgy (PM) method. The relationship between structure design, mechanical hardness and radiation-induced hardening of RGO/W composite were evaluated by nanoindentation. Results revealed that mechanical hardness of nacre-like RGO/W composite was enhanced by 76% in comparison with nacre-like W and was similar to commercial W. Further, under 28.92 displacement per atom (DPA), hardening rate of nacre-like RGO/W composite was lower (18.6%) than that of nacre-like W (129.2%) and commercial W (40.1%). Reasons were attributed to reinforcement effect of RGO and nacre-like structure, which provided numerous RGO-W interfaces as load bearer and helped heal radiation-induced defects. Our work highlights a promising structure design strategy for enhancing damage resistance and mechanical property of nuclear materials by designing nacre-like architecture.