Nanolayered Cu-Nb composites offer a series of enhanced properties for their use in extreme conditions, e.g. high field magnets and high irradiation resistance. However, the stability of the Cu/Nb heterogeneous interface needs confirmation under various conditions. In the present work, molecular dynamics simulations were carried out to investigate the interracial behavior under various temperatures with initial stress at the interface. It is found that the interface becomes unstable at simulation temperatures higher than O00 K, resulting in the emission of dislocations and loops within one or more slip systems. The emission process is Found to be thermally-activated, i.e., the higher temperature, the shorter annealing time needed. The present study is believed to assist the experimental synthesis of the Cu-Nb multilayer nanocomposites For multiple applications.
参考文献
| [1] | A. Misra;M.J. Demkowicz;X. Zhang .The Radiation Damage Tolerance of Ultra-High Strength Nanolayered Composites[J].JOM,2007(9):62-65. |
| [2] | F. Dupouy;E. Snoeck;M. J. Casanove;C. Roucau;J. P. Peyrade;S. Askenazy .Microstructural characterization of high strength and high conductivity nanocomposite wires[J].Scripta materialia,1996(7):1067-1073. |
| [3] | M. J. DEMKOWICZ;R. G. HOAGLAND .SIMULATIONS OF COLLISION CASCADESIN Cu-Nb LAYERED COMPOSITES USINGAN EAM INTERATOMIC POTENTIAL[J].International journal of applied mechanics,2009(3):421-442. |
| [4] | L. Thilly;F. Lecouturier;J. von Stebut .Size-induced enhanced mechanical properties of nanocomposite copper/niobium wires: nanoindentation study[J].Acta materialia,2002(20):5049-5065. |
| [5] | V. Yamakov;D. Wolf;S. R. Phillpot;H. Gleiter .Deformation twinning in nanocrystalline Al by molecular-dynamics simulation[J].Acta materialia,2002(20):5005-5020. |
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