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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Silver Hardening via Hypersonic Impacts

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Autor(es):
Oliveira, Eliezer Fernando [1, 2] ; da Silva Autreto, Pedro Alves [1, 3] ; Galvao, Douglas Soares [1, 2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Gleb Wataghin Inst Phys, Campinas, SP - Brazil
[2] Univ Campinas UNICAMP, Ctr Computat Engn & Sci CCES, Campinas, SP - Brazil
[3] Fed Univ ABC, Ctr Nat Human Sci, Santo Andre, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: MRS ADVANCES; v. 3, n. 8-9, p. 489-494, 2018.
Citações Web of Science: 0
Resumo

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 (similar to 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. (AU)

Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
Beneficiário:Munir Salomao Skaf
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
Processo FAPESP: 16/18499-0 - Investigação de propriedades estruturais, mecânicas e funcionais de nanoestruturas de carbono
Beneficiário:Eliezer Fernando de Oliveira
Linha de fomento: Bolsas no Brasil - Pós-Doutorado