DataVXThe Journal of Physical Chemistry LettersPaper
journal article·2024-10-10

Toward Superior Stiffness in Carbon: The Interplay between Bond Strength and Anisotropic Response

Vladlen V. Zhukov, Zhifeng Zheng, Pavel B. Sorokin

The Journal of Physical Chemistry Letters· Volume 15· Issue 40
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Source abstract

Abstract

Carbon's ability to form diverse structures with varying hybridizations motivates the search for novel materials surpassing diamond's exceptional mechanical rigidity. We analyze previously predicted superhard phases and find that some exhibit average bond stiffness and density higher than those of diamond, hinting at potentially superior stiffness. However, these structures show a lower bulk modulus. We delve into this contradiction and demonstrate that it stems from the structures' anisotropic response to isotropic deformation. The concept of strain anisotropy is introduced to quantify this phenomenon. Our findings reveal a key connection between bond stiffness and bulk modulus in carbon materials, highlighting the importance of considering anisotropic behavior for a comprehensive understanding of the mechanical properties.
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Research context

OpenAlex topics: Force Microscopy Techniques and Applications · Boron and Carbon Nanomaterials Research · Carbon Nanotubes in Composites

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Technological Institute for Superhard and Novel Carbon Materials, 108840, 7a Tsentralnaya street, Troitsk, Moscow, Russian Federation

Laboratory of Digital Material Science, National University of Science and Technology MISiS, 119049, Leninskiy prospekt 4, Moscow, Russian Federation

Key Laboratory of Advanced Energy Storage Technology, Fujian Province University, Fujian Provincial Industry Technologies Development Base for New Energy, Collaborative Innovation Platform for Advanced Electrochemical Energy Storage Technology, National User-Side Energy Storage Innovation Research and Development Center, and College of Energy, Xiamen University, Xiamen 361102, P.R. China

Tan Kah Kee Innovation Laboratory (IKKEM), Xiamen 361102, P.R. China

Funding

Russian Science Foundation

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