Large-deformation and high-strength amorphous porous carbon nanospheres
- Univ. of Virginia, Charlottesville, VA (United States). Dept. of Mechanical and Aerospace Engineering
- Univ. of Illinois at Urbana-Champaign, IL (United States). Dept. of Materials Science and Engineering
- Univ. of Science and Technology of China, Hefei (China). Dept. of Polymer Science and Engineering. CAS Key Lab. of Soft Matter Chemistry
- Northwestern Polytechnical Univ., Xi'an (China). Dept. of Engineering Mechanics
- Univ. of Virginia, Charlottesville, VA (United States). Dept. of Mechanical and Aerospace Engineering; Univ. of Virginia, Charlottesville, VA (United States). Inst. for Nanoscale and Quantum Scientific and Technological Advanced Research
Carbon is one of the most important materials extensively used in industry and our daily life. Crystalline carbon materials such as carbon nanotubes and graphene possess ultrahigh strength and toughness. In contrast, amorphous carbon is known to be very brittle and can sustain little compressive deformation. Inspired by biological shells and honeycomb-like cellular structures in nature, we introduce a class of hybrid structural designs and demonstrate that amorphous porous carbon nanospheres with a thin outer shell can simultaneously achieve high strength and sustain large deformation. The amorphous carbon nanospheres were synthesized via a low-cost, scalable and structure-controllable ultrasonic spray pyrolysis approach using energetic carbon precursors. In situ compression experiments on individual nanospheres show that the amorphous carbon nanospheres with an optimized structure can sustain beyond 50% compressive strain. Both experiments and finite element analyses reveal that the buckling deformation of the outer spherical shell dominates the improvement of strength while the collapse of inner nanoscale pores driven by twisting, rotation, buckling and bending of pore walls contributes to the large deformation.
- Research Organization:
- Univ. of Virginia, Charlottesville, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-05ER46217
- OSTI ID:
- 1624828
- Journal Information:
- Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Determining Compression Characteristics of Honeycomb Material - 19674
Nanomechanical Behavior of Single Crystalline SiC Nanotubes Revealed by Molecular Dynamics Simulations