| Summary: | 碩士 === 大同大學 === 材料工程學系(所) === 96 === Abstract
This research is focused on the effects of TiAlN/CrN Multilayered coatings synthesized by cathodic arc ion plating technology. The coatings were deposited using one Ti50Al50 alloy target and one Cr99.99 target with a fixed target power in all the processes, while the layer thickness was varied by various rotation speeds of the substrate holder in order to produce different nanoscale multi-layered period thickness. In the bargain, discuss the effects of different deposition direction.
The texture structure, and nanoscale multi-layer period thickness of the coatings were determined by X-ray diffraction、Scanning electron microscope and Glow discharge spectrometer for chemical analysis. Hardness and adhesion strength of the coatings were measured by Nanoindentation and Rockwell-C indentation methods, respectively. Corrosion of the coatings were measured by Polarization and immersion test.It has been found that the mechanical properties of the multi-layer
better then the SUS403 stainless steel. The potentiodynamic polarization measurements showed that for all the coatings the corrosion potential shifted to higher values as compared to the uncoated substrate. Similarly, the corrosion current density decreased for coated samples, indicating better corrosion resistance of the coated samples.
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