Physical mechanisms of ultrashort pulse laser induced melting in copper

meng ran; liu xuan; zhou hua

Volume 20 Issue 07

Jul. 2008

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Article Navigation > High Power Laser and Particle Beams > 2008 > 20(07): 0-

Liu Yifei, Chen Yongguang, Wang Qingguo, et al. Analysis of stirring efficiency in reverberation chamber with combined stirring[J]. High Power Laser and Particle Beams, 2013, 25: 963-967.

Citation:

meng ran, liu xuan, zhou hua. Physical mechanisms of ultrashort pulse laser induced melting in copper[J]. High Power Laser and Particle Beams, 2008, 20.

Liu Yifei, Chen Yongguang, Wang Qingguo, et al. Analysis of stirring efficiency in reverberation chamber with combined stirring[J]. High Power Laser and Particle Beams, 2013, 25: 963-967.

Citation:

meng ran, liu xuan, zhou hua. Physical mechanisms of ultrashort pulse laser induced melting in copper[J]. High Power Laser and Particle Beams, 2008, 20.

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Physical mechanisms of ultrashort pulse laser induced melting in copper

1.
School of Mechanical and Automation,Jiamusi University,Jiamusi 154007,China;
2.
School of Engineering,Shanghai Ocean University,Shanghai 200090,China

Publish Date: 2008-07-15

Abstract

Abstract

The kinetics and microscopic mechanisms of ultrashort laser melting of a copper film is studied by modified molecular dynamics method. A model considering the thermal conductivity of free electrons and the consumption of latent heat of melting is used to make the simulation more realistic. The mechanism responsible for the melting of copper under picosecond laser pulse irradiation can be attributed to the homogeneous nucleation of the liquid phase inside the solid region. The melting is a overheated melting caused by homogeneous nucleation, and the velocity of propagation of “melt front” is found up to be 5.8 nm/ps. Picosecond laser pulse induced melting occurring under the condition of thermal confinement results in a less complicate temperature distribution and a weaker effect of unloa
- physical mechanism,
- melting,
- picosecond laser pulse,
- modified molecular dynamics

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