Mechanisms of decomposition of metal during femtosecond laser ablation

Journal Article · Sat Oct 15 04:00:00 EDT 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.72.165415· OSTI ID:20719645

Changrui, Cheng; Xianfan, Xu ^[1]

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1. School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

The mechanisms of decomposition of a metal (nickel) during femtosecond laser ablation are studied using molecular dynamics simulations. It is found that phase explosion is responsible for gas bubble generation and the subsequent material removal at lower laser fluences. The phase explosion process occurs as combined results of heating, thermal expansion, and the propagation of tensile stress wave induced by the laser pulse. When the laser fluence is higher, it is revealed that critical point phase separation plays an important role in material removal.

• OSTI ID: 20719645
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 16 Vol. 72; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
COMPUTERIZED SIMULATION
DECOMPOSITION
HEAT TREATMENTS
LASER RADIATION
MOLECULAR DYNAMICS METHOD
NICKEL
STRESSES
THERMAL EXPANSION