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Structure and Properties of DLC Films Deposited on Mg Alloy at Different $C_{2}H_{2}$ Flows of Magnetron Sputtering Process
| Content Provider | MDPI |
|---|---|
| Author | Li, Haitao Sun, Pengfei Cheng, Donghai |
| Copyright Year | 2021 |
| Description | Diamond-like carbon (DLC) film is widely used due to its excellent properties, such as high hardness and high wear resistance. To investigate the advantages of DLC film applied on the surface of Mg alloy, direct current (DC) pulse magnetron sputtering was used to prepare DLC film via plasma sputtering a graphite target and introducing $C_{2}H_{2}$ gas. The silicon interlayer was fabricated by sputtering the Si target. A scanning electron microscope (SEM), transmission electron microscope (TEM), a nano-indentation instrument, an electrochemical workstation and a pin-on-disc tester were employed to obtain the surface morphology, microstructure, mechanical properties, corrosion behavior and wear resistance of the obtained film, respectively. The results show that the DLC films are dense and compact, and the structure changes from amorphous to nanocrystalline with the increase of $C_{2}H_{2}$ flow. The film prepared at low $C_{2}H_{2}$ flow has larger surface roughness, lower deposition rate, higher hardness and elasticity modulus, poorer corrosion resistance and better wear resistance, compared with the film prepared at higher acetylene flow. The self-corrosion potential of the obtained DLC film is higher than −0.95 V, the corrosion current density is $10^{−7}$ $A/cm^{2}$ orders of magnitude, and the wear rate is $10^{−9}$ $mm^{3}$/Nm orders of magnitude. The friction coefficient of the film is less than 0.065, the hardness is 17.3 to 22.1 MPa, and the elastic modulus is 145 to 170 MPa. The DLC films obtained on the surface of AZ91 alloy have good comprehensive properties. |
| Starting Page | 815 |
| e-ISSN | 20796412 |
| DOI | 10.3390/coatings11070815 |
| Journal | Coatings |
| Issue Number | 7 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-06 |
| Access Restriction | Open |
| Subject Keyword | Coatings Coatings and Films Dlc Film Wear Resistance Corrosion Magnetron Sputtering Mg Alloy |
| Content Type | Text |
| Resource Type | Article |
