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Nanoporous Amorphous Carbon with Exceptional Ultra-High Strength.

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Title: Nanoporous Amorphous Carbon with Exceptional Ultra-High Strength.
Authors: Castillo-Castro, Daniel1 (AUTHOR), Correa, Felipe2 (AUTHOR) felipe.correa@mayor.cl, Aparicio, Emiliano3 (AUTHOR), Amigo, Nicolás4 (AUTHOR), Prada, Alejandro5 (AUTHOR), Figueroa, Juan5 (AUTHOR), González, Rafael I.1,6 (AUTHOR), Bringa, Eduardo3 (AUTHOR), Valencia, Felipe J.5,6 (AUTHOR) felipe.valenciad@gmail.com
Source: Nanomaterials (2079-4991). Apr2023, Vol. 13 Issue 8, p1429. 14p.
Subjects: Amorphous carbon, Nanoporous materials, Lightweight materials, Young's modulus, Shear strain, Specific gravity
Abstract: Nanoporous materials show a promising combination of mechanical properties in terms of their relative density; while there are numerous studies based on metallic nanoporous materials, here we focus on amorphous carbon with a bicontinuous nanoporous structure as an alternative to control the mechanical properties for the function of filament composition.Using atomistic simulations, we study the mechanical response of nanoporous amorphous carbon with 50% porosity, with sp 3 content ranging from 10% to 50%. Our results show an unusually high strength between 10 and 20 GPa as a function of the % s p 3 content. We present an analytical analysis derived from the Gibson–Ashby model for porous solids, and from the He and Thorpe theory for covalent solids to describe Young's modulus and yield strength scaling laws extremely well, revealing also that the high strength is mainly due to the presence of sp 3 bonding. Alternatively, we also find two distinct fracture modes: for low % s p 3 samples, we observe a ductile-type behavior, while high % s p 3 leads to brittle-type behavior due to high high shear strain clusters driving the carbon bond breaking that finally promotes the filament fracture. All in all, nanoporous amorphous carbon with bicontinuous structure is presented as a lightweight material with a tunable elasto-plastic response in terms of porosity and sp 3 bonding, resulting in a material with a broad range of possible combinations of mechanical properties. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Nanoporous Amorphous Carbon with Exceptional Ultra-High Strength.
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  Data: <searchLink fieldCode="AR" term="%22Castillo-Castro%2C+Daniel%22">Castillo-Castro, Daniel</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Correa%2C+Felipe%22">Correa, Felipe</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> felipe.correa@mayor.cl</i><br /><searchLink fieldCode="AR" term="%22Aparicio%2C+Emiliano%22">Aparicio, Emiliano</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Amigo%2C+Nicolás%22">Amigo, Nicolás</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Prada%2C+Alejandro%22">Prada, Alejandro</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Figueroa%2C+Juan%22">Figueroa, Juan</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22González%2C+Rafael+I%2E%22">González, Rafael I.</searchLink><relatesTo>1,6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bringa%2C+Eduardo%22">Bringa, Eduardo</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Valencia%2C+Felipe+J%2E%22">Valencia, Felipe J.</searchLink><relatesTo>5,6</relatesTo> (AUTHOR)<i> felipe.valenciad@gmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Apr2023, Vol. 13 Issue 8, p1429. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Amorphous+carbon%22">Amorphous carbon</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoporous+materials%22">Nanoporous materials</searchLink><br /><searchLink fieldCode="DE" term="%22Lightweight+materials%22">Lightweight materials</searchLink><br /><searchLink fieldCode="DE" term="%22Young's+modulus%22">Young's modulus</searchLink><br /><searchLink fieldCode="DE" term="%22Shear+strain%22">Shear strain</searchLink><br /><searchLink fieldCode="DE" term="%22Specific+gravity%22">Specific gravity</searchLink>
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  Data: Nanoporous materials show a promising combination of mechanical properties in terms of their relative density; while there are numerous studies based on metallic nanoporous materials, here we focus on amorphous carbon with a bicontinuous nanoporous structure as an alternative to control the mechanical properties for the function of filament composition.Using atomistic simulations, we study the mechanical response of nanoporous amorphous carbon with 50% porosity, with sp 3 content ranging from 10% to 50%. Our results show an unusually high strength between 10 and 20 GPa as a function of the % s p 3 content. We present an analytical analysis derived from the Gibson–Ashby model for porous solids, and from the He and Thorpe theory for covalent solids to describe Young's modulus and yield strength scaling laws extremely well, revealing also that the high strength is mainly due to the presence of sp 3 bonding. Alternatively, we also find two distinct fracture modes: for low % s p 3 samples, we observe a ductile-type behavior, while high % s p 3 leads to brittle-type behavior due to high high shear strain clusters driving the carbon bond breaking that finally promotes the filament fracture. All in all, nanoporous amorphous carbon with bicontinuous structure is presented as a lightweight material with a tunable elasto-plastic response in terms of porosity and sp 3 bonding, resulting in a material with a broad range of possible combinations of mechanical properties. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Text: English
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      – SubjectFull: Amorphous carbon
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      – SubjectFull: Lightweight materials
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      – SubjectFull: Young's modulus
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      – SubjectFull: Shear strain
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      – SubjectFull: Specific gravity
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              Text: Apr2023
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