Yudan He, Lei Jin, Jiqiang Zhang, Bingchi Luo, Kai Li, Weidong Wu, Jiangshan Luo. Thickness dependence of microstructure and properties in Be2C coatings as a promising ablation material[J]. Matter and Radiation at Extremes, 2019, 4(4): 045403
- Matter and Radiation at Extremes
- Vol. 4, Issue 4, 045403 (2019)
Fig. 1. XPS spectra of Be2C coating: (a) wide scan; (b) Be1s core levels; (c) C1s core levels.
Fig. 2. XRD patterns of Be2C coatings of various thicknesses.
Fig. 3. Fractured cross-sectional morphologies of Be2C films of various thicknesses.
Fig. 4. Partial surface topography of Be2C films obtained from an optical profiler: (a) 304 nm; (b) 1.14 µ m; (c) 4.26 µ m. Typical defect morphologies: (d) top view; (e) magnified view; (f) cross-sectional view.
Fig. 5. Optical transmittance spectra of Be2C films of different thicknesses. The inset shows a typical optical image of a film sample.
Fig. 6. Plots of (αhν )1/2 vs hν and extrapolation to determine the optical bandgap E g for Be2C films of different thicknesses.
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Table 1. Experimental parameters for deposition of Be2C films.
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Table 2. Deposition time, coating thickness, texture coefficient TC(111), average crystallite size D, surface roughness Ra, deposition rate r, and density ρ of Be2C films of different thicknesses.
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