The Influence of Deposition Temperature on the Microscopic Process of Diamond-like Carbon (DLC) Film Deposition on a 2024 Aluminum Alloy Surface
In this experiment, plasma-enhanced chemical vapor deposition technology was used to deposit diamond-like carbon thin films on the surface of a 2024 aluminum alloy. The effects of deposition temperature on the microstructure, carbon, silicon, and aluminum element distribution, and film substrate adh...
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2024-10-01
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| author | Li Yang Tong Li Baihui Shang Lili Guo Tong Zhang Weina Han |
| author_facet | Li Yang Tong Li Baihui Shang Lili Guo Tong Zhang Weina Han |
| author_sort | Li Yang |
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| description | In this experiment, plasma-enhanced chemical vapor deposition technology was used to deposit diamond-like carbon thin films on the surface of a 2024 aluminum alloy. The effects of deposition temperature on the microstructure, carbon, silicon, and aluminum element distribution, and film substrate adhesion of diamond-like carbon thin films were studied using field emission scanning electron microscopy, energy-dispersive spectroscopy, XRD, scratch gauge, and ultra-depth-of-field microscopy. The results showed that with the increase in deposition temperature, the thickness of DLC film decreased from 8.72 μm to 5.37 μm, and the film bonded well with the substrate. There is a clear transition layer containing silicon elements between the DLC film and the aluminum alloy substrate. The transition layer is a solid solution formed by aluminum and silicon elements, which increases the bonding strength between the film and substrate. C-Si and C-C exist in the form of covalent bonds and undergo orbital hybridization, making the DLC film more stable. When the deposition temperature exceeds the aging temperature of a 2024 aluminum alloy, it will affect the properties of the aluminum alloy substrate. Therefore, the deposition temperature should be below the aging temperature of the 2024 aluminum alloy for coating. At a deposition temperature of 100 °C, the maximum membrane substrate bonding force is 14.45 N. When a continuous sound signal appears and the friction coefficient is the same as that of the substrate, the film is completely damaged. From the super-depth map of the scratch morphology, it can be seen that, at a deposition temperature of 100 °C, a small amount of thin film detachment appears around the scratch. |
| format | Article |
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| institution | Kabale University |
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| spelling | doaj-art-1a4435b965e34d9fa8c90750b3898c6b2024-11-26T17:58:36ZengMDPI AGCrystals2073-43522024-10-01141195010.3390/cryst14110950The Influence of Deposition Temperature on the Microscopic Process of Diamond-like Carbon (DLC) Film Deposition on a 2024 Aluminum Alloy SurfaceLi Yang0Tong Li1Baihui Shang2Lili Guo3Tong Zhang4Weina Han5School of Materials Science and Engineering, Yingkou Institute of Technology, No. 46 Bowen Road, Yingkou 115014, ChinaResearch Center for Corrosion and Erosion Process Control of Equipment and Material in Marine Harsh Environment, Guangzhou Maritime University, Guangzhou 510725, ChinaSchool of Materials Science and Engineering, Yingkou Institute of Technology, No. 46 Bowen Road, Yingkou 115014, ChinaSchool of Materials Science and Engineering, Yingkou Institute of Technology, No. 46 Bowen Road, Yingkou 115014, ChinaSchool of Materials Science and Engineering, Yingkou Institute of Technology, No. 46 Bowen Road, Yingkou 115014, ChinaSchool of Materials Science and Engineering, Yingkou Institute of Technology, No. 46 Bowen Road, Yingkou 115014, ChinaIn this experiment, plasma-enhanced chemical vapor deposition technology was used to deposit diamond-like carbon thin films on the surface of a 2024 aluminum alloy. The effects of deposition temperature on the microstructure, carbon, silicon, and aluminum element distribution, and film substrate adhesion of diamond-like carbon thin films were studied using field emission scanning electron microscopy, energy-dispersive spectroscopy, XRD, scratch gauge, and ultra-depth-of-field microscopy. The results showed that with the increase in deposition temperature, the thickness of DLC film decreased from 8.72 μm to 5.37 μm, and the film bonded well with the substrate. There is a clear transition layer containing silicon elements between the DLC film and the aluminum alloy substrate. The transition layer is a solid solution formed by aluminum and silicon elements, which increases the bonding strength between the film and substrate. C-Si and C-C exist in the form of covalent bonds and undergo orbital hybridization, making the DLC film more stable. When the deposition temperature exceeds the aging temperature of a 2024 aluminum alloy, it will affect the properties of the aluminum alloy substrate. Therefore, the deposition temperature should be below the aging temperature of the 2024 aluminum alloy for coating. At a deposition temperature of 100 °C, the maximum membrane substrate bonding force is 14.45 N. When a continuous sound signal appears and the friction coefficient is the same as that of the substrate, the film is completely damaged. From the super-depth map of the scratch morphology, it can be seen that, at a deposition temperature of 100 °C, a small amount of thin film detachment appears around the scratch.https://www.mdpi.com/2073-4352/14/11/950plasma-enhanced chemical vapor depositiondiamond-like carbon thin filmsedimentation temperatureorbital hybridizationcovalent bond |
| spellingShingle | Li Yang Tong Li Baihui Shang Lili Guo Tong Zhang Weina Han The Influence of Deposition Temperature on the Microscopic Process of Diamond-like Carbon (DLC) Film Deposition on a 2024 Aluminum Alloy Surface Crystals plasma-enhanced chemical vapor deposition diamond-like carbon thin film sedimentation temperature orbital hybridization covalent bond |
| title | The Influence of Deposition Temperature on the Microscopic Process of Diamond-like Carbon (DLC) Film Deposition on a 2024 Aluminum Alloy Surface |
| title_full | The Influence of Deposition Temperature on the Microscopic Process of Diamond-like Carbon (DLC) Film Deposition on a 2024 Aluminum Alloy Surface |
| title_fullStr | The Influence of Deposition Temperature on the Microscopic Process of Diamond-like Carbon (DLC) Film Deposition on a 2024 Aluminum Alloy Surface |
| title_full_unstemmed | The Influence of Deposition Temperature on the Microscopic Process of Diamond-like Carbon (DLC) Film Deposition on a 2024 Aluminum Alloy Surface |
| title_short | The Influence of Deposition Temperature on the Microscopic Process of Diamond-like Carbon (DLC) Film Deposition on a 2024 Aluminum Alloy Surface |
| title_sort | influence of deposition temperature on the microscopic process of diamond like carbon dlc film deposition on a 2024 aluminum alloy surface |
| topic | plasma-enhanced chemical vapor deposition diamond-like carbon thin film sedimentation temperature orbital hybridization covalent bond |
| url | https://www.mdpi.com/2073-4352/14/11/950 |
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