Oxidation behavior of TiAlZrCr/（Ti,Al,Zr,Cr）N gradient films deposited by multi-arc ion plating

Shilu ZHAO* and Jun ZHANG School of Mechanism Engineering,Shenyang University,Shenyang 110044,China Changsheng LIU Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China

摘 要：The two Ti-Al-Zr targets and one pure Cr target were used to prepare the TiAlZrCr/（Ti,Al,Zr,Cr）N gradient films on high speed steel （W18Cr4V） substrates by multi-arc ion plating technique.Short-term isothermal （at 600 ℃,700 ℃,800 ℃ and 900 ℃ for 4h） and long-term cyclic （at 700 ℃ and 800 ℃ for 100h） high temperature oxidation behavior of the gradient films were studied.Then the oxide scales formed on the film specimens were characterized by scanning electron microscopy （SEM）,energy dispersion X-ray spectroscopy （EDS） and X-ray diffraction （XRD）.It was showed that,under short-term isothermal condition,the high temperature oxidation resistance of the gradient film was excellent up to 800 ℃ and an oxide scale comprising TiO2 was observed.On the other hand,under long-term cyclic high temperature condition,the oxidation resistance of the gradient film was excellent at about 700 ℃.

关键词：