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Oxyhydroxide of metallic nanowires in a molecular H2O and H2O2 environment and their effects on mechanical properties
Aral G; Islam MM; Wang YJ(王云江); Ogata S; van Duin ACT
2018-07-07
发表期刊PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷号20期号:25页码:17289-17303
ISSN1463-9076
摘要To avoid unexpected environmental mechanical failure, there is a strong need to fully understand the details of the oxidation process and intrinsic mechanical properties of reactive metallic iron (Fe) nanowires (NWs) under various aqueous reactive environmental conditions. Herein, we employed ReaxFF reactive molecular dynamics (MD) simulations to elucidate the oxidation of Fe NWs exposed to molecular water (H2O) and hydrogen peroxide (H2O2) environment, and the influence of the oxide shell layer on the tensile mechanical deformation properties of Fe NWs. Our structural analysis shows that oxidation of Fe NWs occurs with the formation of different iron oxide and hydroxide phases in the aqueous molecular H2O and H2O2 oxidizing environments. We observe that the resulting microstructure due to pre-oxide shell layer formation reduces the mechanical stress via increasing the initial defect sites in the vicinity of the oxide region to facilitate the onset of plastic deformation during tensile loading. Specifically, the oxide layer of Fe NWs formed in the H2O2 environment has a relatively significant effect on the deterioration of the mechanical properties of Fe NWs. The weakening of the yield stress and Young modulus of H2O2 oxidized Fe NWs indicates the important role of local oxide microstructures on mechanical deformation properties of individual Fe NWs. Notably, deformation twinning is found as the primary mechanical plastic deformation mechanism of all Fe NWs, but it is initially observed at low strain and stress level for the oxidized Fe NWs.
DOI10.1039/c8cp02422g
URL查看原文
收录类别SCI
语种英语
WOS记录号WOS:000436571800044
关键词[WOS]WATER DISSOCIATIVE ADSORPTION ; EARLY-STAGE OXIDATION ; CORE-SHELL NANOWIRES ; REACTIVE FORCE-FIELD ; DYNAMICS SIMULATIONS ; FE(110) SURFACES ; HIGH-TEMPERATURE ; IRON NANOWIRES ; OXIDE-GROWTH ; NANOPARTICLES
WOS研究方向Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS类目Chemistry ; Physics
项目资助者Scientific and Technological Research Council of Turkey (TUBITAK) [BDEB 2219, 1059B191400364] ; Elements Strategy Initiative for Structural Materials (ESISM) ; JSPS KAKENHI [JP17H01238, JP17K18827]
论文分区二类/Q1
力学所作者排名3
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77830
专题非线性力学国家重点实验室
作者单位1.Izmir Inst Technol, Dept Phys, TR-35430 Izmir, Turkey
2.Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
4.Osaka Univ, Dept Mech Sci & Bioengn, Osaka 5608531, Japan
5.Kyoto Univ, Ctr Elements Strategy Initiat Struct Mat ESISM, Kyoto 6068501, Japan
6.van Duin, Adri C. T.] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA
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GB/T 7714
Aral G,Islam MM,Wang YJ,et al. Oxyhydroxide of metallic nanowires in a molecular H2O and H2O2 environment and their effects on mechanical properties[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2018,20(25):17289-17303.
APA Aral G,Islam MM,王云江,Ogata S,&van Duin ACT.(2018).Oxyhydroxide of metallic nanowires in a molecular H2O and H2O2 environment and their effects on mechanical properties.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,20(25),17289-17303.
MLA Aral G,et al."Oxyhydroxide of metallic nanowires in a molecular H2O and H2O2 environment and their effects on mechanical properties".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 20.25(2018):17289-17303.
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