Title Page
Contents
List of Symbols 10
List of abbreviations 11
Abstract in English 13
1. General Introduction 15
1.1. Aluminum 15
1.2. Paradigm shift 17
1.3. Graphene coating 19
1.3.1. Carbon based materials 19
1.3.2. Graphene dip coating 21
1.4. Originality 22
2. Experimental 23
2.1. Materials 23
2.2. Methods 23
2.2.1. Method - direct coating 23
2.2.2. Method - AlN-aided coating 24
2.2.3. Method - PVA-aided coating 24
2.3. Characterization 28
3. Results & Discussion 30
3.1. Optical images of graphene coated Al plate 30
3.2. Optimization of process. 32
3.3. Formation of AlN on Al plate 36
3.4. Morphology of graphene coated Al plates 39
3.5. Raman results 42
3.6. Bonding stress 46
3.7. Thermal conductivity 48
3.8. Theoretical thermal conductivity of G/Al, G/AlN/Al, rGO/Al 50
4. Conclusion 53
References 55
국문 초록 (Abstract in Korean) 60
Table 1. Properties of carbon based materials. 20
Table 2. Sample designation according to the fabrication process. 26
Figure 1. Various series of Aluminum alloy and characteristic of 6061 Al alloy. 16
Figure 2. Global electric vehicle stock. 18
Figure 3. Schematic of coating methods of (a) direct coating, (b) AlN-aided... 27
Figure 4. A schematic depiction of coating routes and optical images of... 31
Figure 5. SEM images of coated Al plate (a-c) direct coating at room... 34
Figure 6. SEM images of coated Al plate (a-c) PVA-aided coating at room... 35
Figure 7. SEM and EDS images of surface nitrided aluminum. 37
Figure 8. (a) XRD patterns of surface nitride aluminum (b) XPS spectra of... 38
Figure 9. SEM images of coated Al plate (a) G/Al (b) G/AlN/Al (c)... 41
Figure 10. Raman spectra of (a) direct coating at room temperature and 50 ℃... 44
Figure 11. Raman spectra of (a) direct coating at room temperature and 50 ℃,... 45
Figure 12. Bonding stress of direct coating, AlN-aided coating and PVA-aided coating. 47
Figure 13. Thermal conductivity of Al, AlN, G/AlN and rGO/Al. 49
Figure 14. Calculated in-plane and cross-plane thermal conductivity of (a)... 52