Bioinspired, graphene-enabled Ni composites with high strength and toughness

Yunya Zhang, Frederick M. Heim, Jamison L. Bartlett, Ningning Song, Dieter Isheim, Xiaodong Li*

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Nature’s wisdom resides in achieving a joint enhancement of strength and toughness by constructing intelligent, hierarchical architectures from extremely limited resources. A representative example is nacre, in which a brick-and-mortar structure enables a confluence of toughening mechanisms on multiple length scales. The result is an outstanding combination of strength and toughness which is hardly achieved by engineering materials. Here, a bioinspired Ni/Ni3C composite with nacre-like, brick-and-mortar structure was constructed from Ni powders and graphene sheets. This composite achieved a 73% increase in strength with only a 28% compromise on ductility, leading to a notable improvement in toughness. The graphene-derived Ni-Ti-Al/Ni3C composite retained high hardness up to 1000°C. The present study unveiled a method to smartly use 2D materials to fabricate high-performance metal matrix composites with brick-and-mortar structure through interfacial reactions and, furthermore, created an opportunity of developing advanced Ni-C–based alloys for high-temperature environments.

Original languageEnglish (US)
Article numbereaav5577
JournalScience Advances
Volume5
Issue number5
DOIs
StatePublished - May 31 2019

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • General

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