Abstract
In order to improve the wear resistance of titanium alloy Ti6Al4V, an adherent Ti-N compound layer was formed on it by hollow cathode discharge (HCD) assisted plasma nitriding in a mixture gas of NH3 and N2 with a ratio of 1:2. After processing at 750 °C for 8 h, a 4 µm thick Ti-N compound layer with high hardness was produced. X-ray diffraction analysis showed that this layer is composed of TiN and Ti2N. Pin-on-disc wear tester in dry sliding condition was used to evaluate the tribological properties. Scanning electron microscopic examination and EDS measurement of unnitrided and nitrided samples were performed after the wear tests. The wear resistance of titanium alloy was greatly enhanced after plasma nitriding.
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