Abstract
TiN coatings on Al 2O 3 substrates were fabricated by vacuum cold spray (VCS) process using ultrafine starting ceramic powders of 20 nm in size at room temperature (RT). Microstructure analysis of the samples was carried out by scanning electron microscopy, transmission electron microscopy, and x-ray diffraction. Sheet resistance of the VCS TiN coatings was measured with a four-point probe. The effects of microstructure on the electrical properties of the coatings were investigated. It was found that the sheet resistance and electrical resistivity of TiN coatings were significantly associating with the spray distance, nozzle traversal speed, and deposition chamber pressure. A minimum sheet resistance of 127 Ω was achieved. The microstructural changes can be correlated to the electrical resistivity of TiN coatings.
| Original language | English |
|---|---|
| Pages (from-to) | 1231-1237 |
| Number of pages | 7 |
| Journal | Journal of Thermal Spray Technology |
| Volume | 19 |
| Issue number | 6 |
| DOIs | |
| State | Published - Dec 2010 |
Keywords
- TiN coating
- electrical resistivity
- microstructure
- vacuum cold spray
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