PSI - Issue 2_B

K.P Zolnikov et al. / Procedia Structural Integrity 2 (2016) 1421–1426

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K.P. Zolnikov et al. / Structural Integrity Procedia 00 (2016) 000–000

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Fig. 6. The structure of the bicomponent cluster (the copper atoms are marked in red, the nickel atoms in blue).The cluster contains around 15 000 atoms, the concentration of copper in it is 9.5 %.

discontinuity (the jump of the atomic volume was about 9 %). Such behavior of the crystalline wires might be related to a lower rate of accommodation processes in the internal structure as compared to the heating rate.

3. Conclusion

It is shown that there are two mechanisms of particle formation at metal wires explosion. The first one is agglom eration of small clusters and it prevails over the process of atom deposition from the gas on the free surface of the particles. The chemical composition of the formed particles is heterogeneous along their cross section. So, the con centration of copper atoms near the particle surface is higher than in the volume. It is found that the distance between dispersing wires greatly a ff ects the process of particle formation. On the basis of the performed calculations one can conclude that the molecular dynamics approach can be used e ff ectively to determine the optimal loading conditions of wire dispersion to obtain particles with desired composition and size.

Acknowledgements

The work was carried out at the support of RFBR Project No. 15-01-06585.

References

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