Graphene-coated tungsten nanowires deliver unprecedented modulus and strength

Materials Research Letters

Zhong-Wei Hu¹  Min Wang¹  Ju Li¹  Chao-Wei Guo¹  Wei-Zhong Han¹  Zhi-Wei Shan¹ 

[1] Xi'an Jiaotong University;

关键词: W nanowires;    graphene;    Young’s modulus;    fracture strength;    size effect;   

DOI  :  10.1080/21663831.2018.1553801

来源: DOAJ

【 摘 要 】

Tungsten (W) nanowires have a wide range of chemical, electronic, and mechanical applications. However, the modulus and strength of traditional W nanowires are quite low, and how to improve their mechanical performance remains a challenge. Here, we describe a novel graphene-coated W nanowires that demonstrate a Young’s modulus of 885 GPa (twice that of W) and a fracture strength of up to 24.7 GPa (66% of the ideal strength). Both the Young’s modulus and the fracture strength show a strong size effect, resulting from the graphene-nanowire core–shell structure.

【 授权许可】

Unknown