Adjustable TiN coatings deposited with HiPIMS on titanium bipolar plates for PEMFC |
| |
| Affiliation: | 1. Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China |
| |
| Abstract: | TiN coatings were deposited by HiPIMS at different N2 flow rate to improve the corrosion resistance and conductivity of metallic bipolar plates. The results show that the surface microstructure of TiN coating depends strongly on the N2 flow rate, all the samples (N2 flow rate: 4 to10 sccm) meet the DOE 2025 standard and exhibit good hydrophobicity, which has great potential for industrial application. Among them, at the N2 flow rate of 8 sccm, the TiN coating shows high compactness and the optimum surface microstructure with the lowest surface roughness of 1.083 nm and the highest hardness of 31.172 GPa. The optimized TiN coating exhibits excellent corrosion resistance with corrosion current density of 0.278 μA cm?2 and a low interfacial contact resistance value of 3.51 mΩ cm2. This work has opened a new way for the large-scale preparation of high-performance metal bipolar plate coatings. |
| |
| Keywords: | Bipolar plate TiN Coatings HiPIMS Corrosion resistance Interface contact resistance |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
