Research on the Performance of Diamond-Like Carbon Coatings on Cutting Aluminum Alloy: Cutting Experiments and First-Principles Calculations
| Autor: | Hao-ming Du, Zhou Qiong, Rong-chuan Lin, Biao Huang, Er-geng Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
machinability
Materials science Diamond-like carbon Machinability amorphous carbon Alloy 02 engineering and technology engineering.material 01 natural sciences first-principles molecular dynamics Coating Machining 0103 physical sciences Materials Chemistry Surface roughness Composite material 010302 applied physics hydrogenated amorphous carbon Diamond coating Surfaces and Interfaces 021001 nanoscience & nanotechnology Surfaces Coatings and Films Amorphous carbon lcsh:TA1-2040 engineering aluminum alloy lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology |
| Zdroj: | Coatings Volume 11 Issue 1 Coatings, Vol 11, Iss 63, p 63 (2021) |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11010063 |
| Popis: | The purpose of this study is to investigate the cutting performance of amorphous carbon (a-C) coatings and hydrogenated amorphous carbon (a-C:H) coatings on machining 2A50 aluminum alloy. First-principles molecular dynamics simulation was applied to investigate the effect of hydrogen on the interaction between coatings and workpiece. The cross-section topography and internal structure of a-C and a-C:H films were characterized by field emission scanning electron microscopy and Raman spectroscopy. The surface roughness of the deposited films and processed workpiece were measured using a white light interferometer. The results show that the a-C-coated tool had the highest service life of 121 m and the best workpiece surface quality (Sq parameter of 0.23 &mu m) while the workpiece surface roughness Sq parameter was 0.35 and 0.52 &mu m when machined by the a-C:H-coated and the uncoated tool, respectively. Meanwhile, the build-up edge was observed on the a-C:H-coated tool and a layer of aluminum alloy was observed to have adhered to the surface of the uncoated tool at its stable stage. An interface model that examined the interactions between H-terminated diamond (111)/Al(111) surfaces revealed that H atoms would move laterally with the action of cutting heat (549 K) and increase the interaction between a-C:H and Al surfaces therefore, Al was prone to adhere to the a-C:H-coated tool surface. The a-C coating shows better performance on cutting aluminum alloy than the a-C:H coating. |
| Databáze: | OpenAIRE |
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