Abstract
Laser processing techniques have been given increasing attentions in the field of metallic glasses (MGs). In this work, effects of two kinds of shield gases, nitrogen and argon, on nanosecond-pulsed laser irradiation of Zr-based MG were comparatively investigated. Results showed that compared to argon gas, nitrogen gas remarkably promoted the formation of cracks during laser irradiation. Furthermore, crack formation in nitrogen gas was enhanced by increasing the peak laser power intensity or decreasing the laser scanning speed. X-ray diffraction and micro-Raman spectroscopy indicated that the reason for enhanced cracks in nitrogen gas was the formation of ZrN.
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Acknowledgments
H.H. is an International Research Fellow of the Japan Society for the Promotion of Science (JSPS). This study has been financially supported by Grant-in-Aid for JSPS Fellows (Grant No. 26-04048).
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Huang, H., Noguchi, J. & Yan, J. Shield gas induced cracks during nanosecond-pulsed laser irradiation of Zr-based metallic glass. Appl. Phys. A 122, 881 (2016). https://doi.org/10.1007/s00339-016-0419-7
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DOI: https://doi.org/10.1007/s00339-016-0419-7