ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The Ti-Hf alloy system forms α-β isomorphous system and does not form anyintermetallic compounds, which is also beneficial for good mechanical properties. And in order toavoid the release of materials, surface modifications are generally carried out to form a TiN andZrN layer on the surface. Electrochemical properties of TiN and ZrN coated Ti-Hf alloy by RFsputteringhas been researched using various electrochemical methods.Ti-10wt%, 20wt%, 30wt%, and 40wt% Hf alloys manufactured by non consumable vacuum arcmelting furnace. All the specimens were heat treatment at 1000°C for 24hr in Ar atmospherefollowed by furnace cooling, respectively. The specimens were coated with TiN and ZrNrespectively, by RF-magnetron sputtering method. The microstructures were conducted by usingOM, EDX and SEM. The corrosion tests were carried out using potentiodynamic(PARSTAT 2273,EG&G, USA) and potentiostatic test in 0.9% NaCl solution at 36.5 ±1 °C. Microstructure clearlyobserved that lamellar structure translated to needle-like structure with increased Hf contents. Fromthe analysis of TiN and ZrN coated layer analysis, TiN and ZrN coated surface showed columlarstructure with 600nm and 100nm thickness, respectively. The corrosion resistance of TiN and ZrNcoated Ti alloys were higher than those of the non-coated Ti-alloy in 0.9%NaCl solution, indicatingbetter protective effect
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.813.pdf
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