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Volume 40 Issue 5
May. 2026
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Chinese Journal of High Pressure Physics  > 2026  >  40(5): 050105.
JIANG Jun, SUN Weifu. Phase Transformation, Sintering Mechanism and Dynamics of Singlet-Doublet Al Nanosphere Collisions with Initial Ⅰ-Shaped Configuration[J]. Chinese Journal of High Pressure Physics, 2026, 40(5): 050105. doi: 10.11858/gywlxb.20251176
Citation: JIANG Jun, SUN Weifu. Phase Transformation, Sintering Mechanism and Dynamics of Singlet-Doublet Al Nanosphere Collisions with Initial Ⅰ-Shaped Configuration[J]. Chinese Journal of High Pressure Physics, 2026, 40(5): 050105. doi: 10.11858/gywlxb.20251176
shu

Phase Transformation, Sintering Mechanism and Dynamics of Singlet-Doublet Al Nanosphere Collisions with Initial Ⅰ-Shaped Configuration

doi: 10.11858/gywlxb.20251176

  • Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401120, China

  • Received Date: 28 Aug 2025
  • Rev Recd Date: 29 Nov 2025
  • Accepted Date: 13 Jan 2026
    • Available Online: 03 Dec 2025
  • Issue Publish Date: 05 May 2026
    Abstract
  • Molecular dynamics simulations are used to study the dynamics of a single Al nanosphere (singlet) colliding with an aggregate of two Al nanospheres (doublet) with initial Ⅰ-shaped configuration. Depending on the initial impact velocity, there are four collision outcomes, namely bounce, adhesion, aggregation and melting. At a very low velocity, the repulsive force between the nanospheres leads the nanospheres to rebound without contact, and the critical velocity of bounce decreases with the increase of the diameter of the nanosphere. As the velocity increases, the nanospheres are sintered together due to adhesion between them and the formation of new bonds. The phase transformation and atomic diffusion during singlet-doublet collisions are quantitatively characterized by common neighbor analysis, dislocation analysis and mean square displacement to explore the underlying sintering mechanism. The critical impact velocity of singlet melting is obtained by monitoring the temperature of singlet with different diameters.

     

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