Exploring the explosive ablation regime of metals in nanosecond micromachining

Jennifer M. Fishburn; Richard P. Mildren; Daniel Kapitan; Michael J. Withford; Daniel J. W. Brown; James A. Piper

doi:10.1117/12.376996

1 February 2000 Exploring the explosive ablation regime of metals in nanosecond micromachining

Jennifer M. Fishburn, Richard P. Mildren, Daniel Kapitan, Michael J. Withford, Daniel J. W. Brown, James A. Piper

Proceedings Volume 3885, High-Power Laser Ablation II; (2000) https://doi.org/10.1117/12.376996
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

We present results of single shot ablation experiments for a variety of metal samples (In, Al, Cu, Mo, W, Ti) using visible, nanosecond lasers at fluences up to approximately 10⁴ J cm^-2. At low fluences, usually less than 10² J cm^-2, small amounts of material were removed and removal was approximately uniform across the ablation crater. As the fluence increased above approximately 10² J cm^-2, substantially more material was removed and a conical pit developed in the center of the ablation crater. The appearance of these conical pits is consistent with material removed by phase explosion mechanisms. In this paper, this ablation phenomenon will be investigated by presenting the crater morphology as a function of fluence. Consequences for micromachining with visible, high repetition rate, nanosecond lasers will be discussed.

Citation Download Citation

Jennifer M. Fishburn, Richard P. Mildren, Daniel Kapitan, Michael J. Withford, Daniel J. W. Brown, and James A. Piper "Exploring the explosive ablation regime of metals in nanosecond micromachining", Proc. SPIE 3885, High-Power Laser Ablation II, (1 February 2000); https://doi.org/10.1117/12.376996

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