Bing Han, Xi Chen, Meng Jiang, Wenlong Chen, Dongdong Zhang, Lichao Cao, Junshuang Zhang, Xianbin Teng, Yanbin Chen. Laser Cladding High‑Entropy Alloy Coating Reinforced by Carbon Nanotubes and Its Corrosion Resistance[J]. Chinese Journal of Lasers, 2023, 50(24): 2402205
- Chinese Journal of Lasers
- Vol. 50, Issue 24, 2402205 (2023)
Fig. 1. Micromorphologies of CoCrFeNi powder and CNTs before and after mechanical mixing. (a) CoCrFeNi raw powder; (b) CNT raw powder; (c) CoCrFeNi-CNTs powder; (d) local magnification of Fig. 1 (c)
Fig. 2. Laser cladding diagram for preparing CoCrFeNi-CNTs composite coating and physical image
Fig. 3. XRD patterns of CoCrFeNi raw powder and CoCrFeNi-CNTs composite coating
Fig. 4. Sectional metallographic morphologies of CoCrFeNi-CNTs composite coating. (a) Low magnification of metallographic morphology of coating cross section; (b) micro-morphology of region A; (c) micro-morphology of region B; (d) micro-morphology of C region
Fig. 5. TEM microstructure of CoCrFeNi-CNTs composite coating. (a) Intergranular carbide morphology; (b) enlarged morphology of D region
Fig. 6. SEM microstructure of unknown substances in CoCrFeNi-CNTs composite coating
Fig. 7. Comparison of microhardness distributions in CoCrFeNi-CNTs and CoCrFeNi coatings
Fig. 8. SEM microstructures of CoCrFeNi-CNTs composite coating under different salt spray corrosion time. (a) 36 h; (b) 168 h; (c) 269 h (imaging in secondary electron mode); (d) 269 h (imaging in backscatter mode); (e) distribution of C element in area E; (f) distribution of Si element in area E
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Table 1. Measured components of high-entropy alloy powder
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Table 2. Optimized process parameters of laser cladding CoCrFeNi high-entropy alloy composite coating
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Table 3. EDS results measured at microscopic areas of CoCrFeNi-CNTs composite coating
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