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Related Experiment Video

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Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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Influence of ultrafast laser processing on amorphous structures - based on molecular dynamics simulation.

Shijia Liu1, Jiaqi Liu2, Jialin Liu2

  • 1School of OptoElectronic Engineering, Changchun University of Science and Technology Changchun 130022 China.

RSC Advances
|December 10, 2024
PubMed
Summary

Ultrafast laser processing of Ni-Fe alloys refines surface structures by accelerating crystallization. Enhanced energy deposition reduces defect formation and processing time, offering insights into material dynamics.

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Computational Physics

Background:

  • Ultrafast laser processing offers high precision for micro/nanoscale fabrication.
  • Observing ultrafast laser-material interactions is challenging due to short timescales.

Purpose of the Study:

  • Investigate ultrafast laser processing of amorphous defects on Ni-Fe alloy surfaces.
  • Analyze the impact of energy deposition on crystallization behavior.
  • Understand nucleation and growth mechanisms during laser treatment.

Main Methods:

  • Molecular dynamics simulations were employed.
  • Simulations focused on nanosecond timescale events.
  • Analysis of energy deposition effects on Ni-Fe alloy surface structure.

Main Results:

  • Crystallization temperature increases with the rate of temperature change.
  • Enhanced energy deposition accelerates lattice formation and atomic ordering.
  • Crystallization time reduced from 4.5 ns to 3.2 ns; lattice phase transition completed within 0.5 ns.
  • Increased incubation temperature minimizes amorphous phase proportion.

Conclusions:

  • Simulation results elucidate nucleation and growth mechanisms in laser-treated Ni-Fe alloys.
  • Provides insights into ultrafast laser effects on surface lattice structures and atomic dynamics.
  • Establishes a theoretical foundation for advanced material processing techniques.