Mingchi Zhang, Ziyuan Liu, Ning Pan, Haiyan Tao, Jingquan Lin. Wetting Mechanism of Stainless Steel Micro-Nano Structure Surface Prepared by Femtosecond Laser[J]. Chinese Journal of Lasers, 2021, 48(18): 1802001
- Chinese Journal of Lasers
- Vol. 48, Issue 18, 1802001 (2021)
Fig. 1. Stainless steel micro-nano structure surface via femtosecond laser. (a) Laser energy density is 0.4 J/cm2; (b) laser energy density is 1.2 J/cm2
Fig. 2. Contact angle. (a) Contact angle of the original surface of stainless steel; (b) contact angle of stainless steel surface processed via femtosecond laser with laser energy density of 0.4 J/cm2
Fig. 3. Contact angle of SL-Air and SL-NaOH changes with time. (a) Surface morphology of SL-Air after 60 days; (b)surface morphology of SL-NaOH after 60 days
Fig. 4. Infiltration time of SH-Air and SH-NaOH. (a) Start time of measuring the infiltration time; (b) end time of measuring the infiltration time; (c) surface morphology of SH-Airafter 40 days; (d)surface morphology of SH-NaOH after 40 days
Fig. 5. XPS high-resolution spectra of SL-Air-1 surface
Fig. 6. Energy spectrum peak results of different surfaces. (a) SL-Air-1 and (b) SL-Air-60 of C 1s peak; (c)SL-Air-1 and (d) SL-Air- 60 of O 1s peak
Fig. 7. Changes in the content of C and O
Fig. 8. O 1s split peak fitting situation and the content of oxygen-containing groups. (a) Peak splitting results of SL-NaOH-1; (b) peak splitting results of SL-NaOH-60; (c) content of oxygen-containing groups
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Table 1. Content of elements in stainless steel (mass fraction,%)
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