1.
Oliveira, Eliezer Fernando; Autreto, Pedro Alves da Silva; Galvao, Douglas Soares
On hardening silver nanocubes by high velocity impacts: a fully atomistic molecular dynamics investigation Journal Article
In: Journal of Materials Science, vol. 53, no. 10, pp. 7486–7492, 2018.
@article{Oliveira2018,
title = {On hardening silver nanocubes by high velocity impacts: a fully atomistic molecular dynamics investigation},
author = {Oliveira, Eliezer Fernando and Autreto, Pedro Alves da Silva and Galvao, Douglas Soares},
url = {https://link.springer.com/article/10.1007/s10853-018-2104-z},
doi = {10.1007/s10853-018-2104-z},
year = {2018},
date = {2018-02-09},
journal = {Journal of Materials Science},
volume = {53},
number = {10},
pages = {7486–7492},
abstract = {Gradient nanograins (GNG) creation in metals has been a promising approach to obtain ultra-strong materials. Recently, R. Thevamaran et al. (Science 354:312 in 2016) proposed a single-step method based on high-velocity impacts of silver nanocubes (SNC) to produce almost perfect GNG. However, after certain time, these grains spontaneously coalesce, which compromises the induced hardening and other mechanical properties. To better understand these processes, a detailed investigation at the atomic scale of the deformation/hardening mechanisms are needed, which is one of the objectives of the present work. We carried out fully atomistic molecular dynamics (MD) simulations of silver nanocubes at high impact velocity values using realistic structural models. Our MD results suggest that besides the GNG mechanisms, the observed SNC hardening could be also the result of the existence of polycrystalline arrangements formed by HCP domains encapsulated by FCC ones in the smashed SNC. This can be a new way to design ultra-strong materials, even in the absence of GNG domains.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Gradient nanograins (GNG) creation in metals has been a promising approach to obtain ultra-strong materials. Recently, R. Thevamaran et al. (Science 354:312 in 2016) proposed a single-step method based on high-velocity impacts of silver nanocubes (SNC) to produce almost perfect GNG. However, after certain time, these grains spontaneously coalesce, which compromises the induced hardening and other mechanical properties. To better understand these processes, a detailed investigation at the atomic scale of the deformation/hardening mechanisms are needed, which is one of the objectives of the present work. We carried out fully atomistic molecular dynamics (MD) simulations of silver nanocubes at high impact velocity values using realistic structural models. Our MD results suggest that besides the GNG mechanisms, the observed SNC hardening could be also the result of the existence of polycrystalline arrangements formed by HCP domains encapsulated by FCC ones in the smashed SNC. This can be a new way to design ultra-strong materials, even in the absence of GNG domains.
2.
Oliveira, Eliezer Fernando; da Silva Autreto, Pedro Alves; Galvao, Douglas Soares
Silver Hardening via Hypersonic Impacts Journal Article
In: MRS Advances, vol. 3, no. 8-9, pp. 489-494, 2018.
@article{Oliveira2018b,
title = {Silver Hardening via Hypersonic Impacts},
author = {Eliezer Fernando Oliveira and Pedro Alves da Silva Autreto and Douglas Soares Galvao},
url = {https://www.cambridge.org/core/journals/mrs-advances/article/silver-hardening-via-hypersonic-impacts/6A35FAB117B4FD244BBD11A64CD25160},
doi = {DOI: 10.1557/adv.2018. 173},
year = {2018},
date = {2018-01-01},
journal = {MRS Advances},
volume = {3},
number = {8-9},
pages = {489-494},
abstract = {The search for new ultra strong materials has been a very active research area. With relation to metals, a successful way to improve their strength is by the creation of a gradient of nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312- 316 (2016)] propose a single step method based on high velocity impact of silver nanocubes to produce high-quality GNG. This method consists of producing high impact collisions of silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an improvement in the mechanical properties of the silver after the impact, the GNG creation and the strengthening mechanism at nanoscale remain unclear. In order to gain further insights about these mechanisms, we carried out fully atomistic molecular dynamics simulations (MD) to investigate the atomic conformations/rearrangements during and after high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the co- existence of polycrystalline arrangements after the impact formed by core HCP domains surrounded by FCC ones, which could also contribute to explain the structural hardening.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The search for new ultra strong materials has been a very active research area. With relation to metals, a successful way to improve their strength is by the creation of a gradient of nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312- 316 (2016)] propose a single step method based on high velocity impact of silver nanocubes to produce high-quality GNG. This method consists of producing high impact collisions of silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an improvement in the mechanical properties of the silver after the impact, the GNG creation and the strengthening mechanism at nanoscale remain unclear. In order to gain further insights about these mechanisms, we carried out fully atomistic molecular dynamics simulations (MD) to investigate the atomic conformations/rearrangements during and after high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the co- existence of polycrystalline arrangements after the impact formed by core HCP domains surrounded by FCC ones, which could also contribute to explain the structural hardening.
3.
Oliveira, Eliezer Fernando; Pedro Alves da Silva Autreto,; Galvao, Douglas Soares
Silver Hardening via Hypersonic Impacts Online
2017, (preprint arXiv:1801.04780).
@online{Oliveira2017,
title = {Silver Hardening via Hypersonic Impacts},
author = {Eliezer Fernando Oliveira and Pedro Alves da Silva Autreto, and Douglas Soares Galvao},
url = {https://arxiv.org/abs/1801.04780},
year = {2017},
date = {2017-01-15},
abstract = {The search for new ultra strong materials has been a very active research area. With relation
to metals, a successful way to improve their strength is by the creation of a gradient of
nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312-
316 (2016)] propose a single step method based on high velocity impact of silver nanocubes
to produce high-quality GNG. This method consists of producing high impact collisions of
silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an
improvement in the mechanical properties of the silver after the impact, the GNG creation
and the strengthening mechanism at nanoscale remain unclear. In order to gain further
insights about these mechanisms, we carried out fully atomistic molecular dynamics
simulations (MD) to investigate the atomic conformations/rearrangements during and after
high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the coexistence
of polycrystalline arrangements after the impact formed by core HCP domains
surrounded by FCC ones, which could also contribute to explain the structural hardening.},
note = {preprint arXiv:1801.04780},
keywords = {},
pubstate = {published},
tppubtype = {online}
}
The search for new ultra strong materials has been a very active research area. With relation
to metals, a successful way to improve their strength is by the creation of a gradient of
nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312-
316 (2016)] propose a single step method based on high velocity impact of silver nanocubes
to produce high-quality GNG. This method consists of producing high impact collisions of
silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an
improvement in the mechanical properties of the silver after the impact, the GNG creation
and the strengthening mechanism at nanoscale remain unclear. In order to gain further
insights about these mechanisms, we carried out fully atomistic molecular dynamics
simulations (MD) to investigate the atomic conformations/rearrangements during and after
high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the coexistence
of polycrystalline arrangements after the impact formed by core HCP domains
surrounded by FCC ones, which could also contribute to explain the structural hardening.
to metals, a successful way to improve their strength is by the creation of a gradient of
nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312-
316 (2016)] propose a single step method based on high velocity impact of silver nanocubes
to produce high-quality GNG. This method consists of producing high impact collisions of
silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an
improvement in the mechanical properties of the silver after the impact, the GNG creation
and the strengthening mechanism at nanoscale remain unclear. In order to gain further
insights about these mechanisms, we carried out fully atomistic molecular dynamics
simulations (MD) to investigate the atomic conformations/rearrangements during and after
high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the coexistence
of polycrystalline arrangements after the impact formed by core HCP domains
surrounded by FCC ones, which could also contribute to explain the structural hardening.
2018
3.
Oliveira, Eliezer Fernando; Autreto, Pedro Alves da Silva; Galvao, Douglas Soares
On hardening silver nanocubes by high velocity impacts: a fully atomistic molecular dynamics investigation Journal Article
In: Journal of Materials Science, vol. 53, no. 10, pp. 7486–7492, 2018.
Abstract | Links | BibTeX | Tags: Fracture, impact, Molecular Dynamics, silver
@article{Oliveira2018,
title = {On hardening silver nanocubes by high velocity impacts: a fully atomistic molecular dynamics investigation},
author = {Oliveira, Eliezer Fernando and Autreto, Pedro Alves da Silva and Galvao, Douglas Soares},
url = {https://link.springer.com/article/10.1007/s10853-018-2104-z},
doi = {10.1007/s10853-018-2104-z},
year = {2018},
date = {2018-02-09},
journal = {Journal of Materials Science},
volume = {53},
number = {10},
pages = {7486–7492},
abstract = {Gradient nanograins (GNG) creation in metals has been a promising approach to obtain ultra-strong materials. Recently, R. Thevamaran et al. (Science 354:312 in 2016) proposed a single-step method based on high-velocity impacts of silver nanocubes (SNC) to produce almost perfect GNG. However, after certain time, these grains spontaneously coalesce, which compromises the induced hardening and other mechanical properties. To better understand these processes, a detailed investigation at the atomic scale of the deformation/hardening mechanisms are needed, which is one of the objectives of the present work. We carried out fully atomistic molecular dynamics (MD) simulations of silver nanocubes at high impact velocity values using realistic structural models. Our MD results suggest that besides the GNG mechanisms, the observed SNC hardening could be also the result of the existence of polycrystalline arrangements formed by HCP domains encapsulated by FCC ones in the smashed SNC. This can be a new way to design ultra-strong materials, even in the absence of GNG domains.},
keywords = {Fracture, impact, Molecular Dynamics, silver},
pubstate = {published},
tppubtype = {article}
}
Gradient nanograins (GNG) creation in metals has been a promising approach to obtain ultra-strong materials. Recently, R. Thevamaran et al. (Science 354:312 in 2016) proposed a single-step method based on high-velocity impacts of silver nanocubes (SNC) to produce almost perfect GNG. However, after certain time, these grains spontaneously coalesce, which compromises the induced hardening and other mechanical properties. To better understand these processes, a detailed investigation at the atomic scale of the deformation/hardening mechanisms are needed, which is one of the objectives of the present work. We carried out fully atomistic molecular dynamics (MD) simulations of silver nanocubes at high impact velocity values using realistic structural models. Our MD results suggest that besides the GNG mechanisms, the observed SNC hardening could be also the result of the existence of polycrystalline arrangements formed by HCP domains encapsulated by FCC ones in the smashed SNC. This can be a new way to design ultra-strong materials, even in the absence of GNG domains.
2.
Oliveira, Eliezer Fernando; da Silva Autreto, Pedro Alves; Galvao, Douglas Soares
Silver Hardening via Hypersonic Impacts Journal Article
In: MRS Advances, vol. 3, no. 8-9, pp. 489-494, 2018.
Abstract | Links | BibTeX | Tags: Fracture, impact, Molecular Dynamics, silver
@article{Oliveira2018b,
title = {Silver Hardening via Hypersonic Impacts},
author = {Eliezer Fernando Oliveira and Pedro Alves da Silva Autreto and Douglas Soares Galvao},
url = {https://www.cambridge.org/core/journals/mrs-advances/article/silver-hardening-via-hypersonic-impacts/6A35FAB117B4FD244BBD11A64CD25160},
doi = {DOI: 10.1557/adv.2018. 173},
year = {2018},
date = {2018-01-01},
journal = {MRS Advances},
volume = {3},
number = {8-9},
pages = {489-494},
abstract = {The search for new ultra strong materials has been a very active research area. With relation to metals, a successful way to improve their strength is by the creation of a gradient of nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312- 316 (2016)] propose a single step method based on high velocity impact of silver nanocubes to produce high-quality GNG. This method consists of producing high impact collisions of silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an improvement in the mechanical properties of the silver after the impact, the GNG creation and the strengthening mechanism at nanoscale remain unclear. In order to gain further insights about these mechanisms, we carried out fully atomistic molecular dynamics simulations (MD) to investigate the atomic conformations/rearrangements during and after high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the co- existence of polycrystalline arrangements after the impact formed by core HCP domains surrounded by FCC ones, which could also contribute to explain the structural hardening.},
keywords = {Fracture, impact, Molecular Dynamics, silver},
pubstate = {published},
tppubtype = {article}
}
The search for new ultra strong materials has been a very active research area. With relation to metals, a successful way to improve their strength is by the creation of a gradient of nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312- 316 (2016)] propose a single step method based on high velocity impact of silver nanocubes to produce high-quality GNG. This method consists of producing high impact collisions of silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an improvement in the mechanical properties of the silver after the impact, the GNG creation and the strengthening mechanism at nanoscale remain unclear. In order to gain further insights about these mechanisms, we carried out fully atomistic molecular dynamics simulations (MD) to investigate the atomic conformations/rearrangements during and after high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the co- existence of polycrystalline arrangements after the impact formed by core HCP domains surrounded by FCC ones, which could also contribute to explain the structural hardening.
2017
1.
Oliveira, Eliezer Fernando; Pedro Alves da Silva Autreto,; Galvao, Douglas Soares
Silver Hardening via Hypersonic Impacts Online
2017, (preprint arXiv:1801.04780).
Abstract | Links | BibTeX | Tags: Fracture, impact, Molecular Dynamics, silver
@online{Oliveira2017,
title = {Silver Hardening via Hypersonic Impacts},
author = {Eliezer Fernando Oliveira and Pedro Alves da Silva Autreto, and Douglas Soares Galvao},
url = {https://arxiv.org/abs/1801.04780},
year = {2017},
date = {2017-01-15},
abstract = {The search for new ultra strong materials has been a very active research area. With relation
to metals, a successful way to improve their strength is by the creation of a gradient of
nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312-
316 (2016)] propose a single step method based on high velocity impact of silver nanocubes
to produce high-quality GNG. This method consists of producing high impact collisions of
silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an
improvement in the mechanical properties of the silver after the impact, the GNG creation
and the strengthening mechanism at nanoscale remain unclear. In order to gain further
insights about these mechanisms, we carried out fully atomistic molecular dynamics
simulations (MD) to investigate the atomic conformations/rearrangements during and after
high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the coexistence
of polycrystalline arrangements after the impact formed by core HCP domains
surrounded by FCC ones, which could also contribute to explain the structural hardening.},
note = {preprint arXiv:1801.04780},
keywords = {Fracture, impact, Molecular Dynamics, silver},
pubstate = {published},
tppubtype = {online}
}
The search for new ultra strong materials has been a very active research area. With relation
to metals, a successful way to improve their strength is by the creation of a gradient of
nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312-
316 (2016)] propose a single step method based on high velocity impact of silver nanocubes
to produce high-quality GNG. This method consists of producing high impact collisions of
silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an
improvement in the mechanical properties of the silver after the impact, the GNG creation
and the strengthening mechanism at nanoscale remain unclear. In order to gain further
insights about these mechanisms, we carried out fully atomistic molecular dynamics
simulations (MD) to investigate the atomic conformations/rearrangements during and after
high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the coexistence
of polycrystalline arrangements after the impact formed by core HCP domains
surrounded by FCC ones, which could also contribute to explain the structural hardening.
to metals, a successful way to improve their strength is by the creation of a gradient of
nanograins (GNG) inside the material. Recently, R. Thevamaran et al. [Science v354, 312-
316 (2016)] propose a single step method based on high velocity impact of silver nanocubes
to produce high-quality GNG. This method consists of producing high impact collisions of
silver cubes at hypersonic velocity (~400 m/s) against a rigid wall. Although they observed an
improvement in the mechanical properties of the silver after the impact, the GNG creation
and the strengthening mechanism at nanoscale remain unclear. In order to gain further
insights about these mechanisms, we carried out fully atomistic molecular dynamics
simulations (MD) to investigate the atomic conformations/rearrangements during and after
high impact collisions of silver nanocubes at ultrasonic velocity. Our results indicate the coexistence
of polycrystalline arrangements after the impact formed by core HCP domains
surrounded by FCC ones, which could also contribute to explain the structural hardening.
http://scholar.google.com/citations?hl=en&user=95SvbM8AAAAJ
