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URN etd-0614105-110201 Statistics This thesis had been viewed 2905 times. Download 3313 times. Author Kuei-Laing Lai Author's Email Address email@example.com Department Materials Engineering Year 2004 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 88 Title Study on Coating Characteristics and Corrosive Behaviors of ADI Deposited TiN/TiAlN by CAPD Method Keyword TiN/TiAlN Surface modification Austempered ductile iron Cathordic arc deposition Corrosion resist Corrosion resist Cathordic arc deposition Austempered ductile iron Surface modification TiN/TiAlN Abstract Austempered ductile iron (ADI) possesses high tensile strength, wear resistance, fatigue resistance and low cost, and it is widely applied on mechanical parts. In general, austempering temperature of ADI is in the range of Ms~450℃, thus, the traditional heat treatment at high temperature for case hardening is not available to treat ADI. This research used the method of cathodic arc plasma deposition (CAPD) to coat TiN/TiAlN on ADI substrate and explored the effect of the surface coatings on corrosion behaviors of ADI. Moreover, XRD, HRc and SEM were further utilized to analysis the various properties of the coating films. The results showed that the hardness of the coated ADI is higher than that of uncoated ADI. However, the surface of coated ADI specimens is rougher than that of uncoated ADI. The adhesion between film and ADI substrate is better than that between film and graphite substrate. After polarization curves test, it was found that the corrosion current of coated specimen is smaller than that of uncoated specimen. Moreover, in 10 Vol.％HCl and 10Vol.%H2SO4 solution , the coated specimens process the lower corrosion rate than uncoated specimen. Thus, it implied that ADI coated with TiN/TiAlN films can evidently raise the corrosion resistance in sea water,hydrochloric acid and sulphuric acid. Advisor Committee Cheng-Hsun Hsu - advisor
Hwi-Ping Feng - co-chair
Yih-Shiun Shih - co-chair
Files Date of Defense 2005-06-10 Date of Submission 2005-06-14