Volume 83, Number 4, August 2008
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||06 August 2008|
Component dependence of mechanical properties of helical Ni-Al alloy nanowires
Physics Department, Ocean University of China - Qingdao, China
2 Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, School of Material Science and Engineering, Shandong University - Shandong, China
Corresponding author: email@example.com
Accepted: 4 July 2008
Using molecular-dynamics simulation with tight-binding potentials, we have studied the deformation and stretching mechanism of Ni-Al alloy nanowires (NWs) with different component contents. These NWs encapsulated into carbon nanotube (CNT) form the novel multi-walled helical structures. It is found that, during the stretching process, some surface atoms slip into the point-defect of the inner layer of NWs. As the cross-section area becomes necking, this bond rearrangement results in the abrupt variation of the potential curves. Furthermore, the simulation results show that the force-strain curve is linear before a certain point Y1 (at about ) and non-linear after Y1. In addition, the Young modulus characteristic is variable during the stretching and dependent upon the component content of alloy NWs.
PACS: 62.25.-g – Mechanical properties of nanoscale systems
© EPLA, 2008
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