title: Electrochemical oxide nanotube formation on the Ti-35Ta-xHf alloys for dental materials.
abstract: In this study, we investigated the electrochemical oxide nanotube formation on the Ti-35Ta-xHf alloys for dental materials. The Ti-35Ta-xHf alloys contained from 3 wt.% to 15 wt.% Hf were manufactured by arc melting furnace. The nanotube oxide layers were formed on Ti-35Ta-xHf alloy by anodic oxidation method in 1 M H3PO4 electrolytes containing 0.5 wt.% NaF and 0.8 wt.% NaF at room temperature. The surface characteristics of Ti-35Ta-xHf alloy and nanotube morphology were determined by FE-SEM, STEM, and XRD. The nano-porous surface of Ti-35Ta-xHf alloys showed in 0.5 wt% NaF solution and nanotubular surface showed in 0.8 wt% NaF solution, respectively. The highly ordered nanotube layer without regular knots was formed on the Ti-35Ta-15Hf alloy in the 0.5 wt% NaF solution compared to on Ti-35Ta-3Hf and Ti-35Ta-7Hf alloys in 0.8 wt% NaF solution. Also, the nanotube length of Ti-35Ta-xHf alloys increased as Hf content increased.
authors: Department of Dental Materials, Regional Innovation Center for Dental Science & Engineering, Chosun University, Gwangju 501-759, Korea.
authors: Byung-Hak
authors: BH
authors: Moon
authors: Yong-Hoon
authors: YH
authors: Jeong
authors: Han-Cheol
authors: HC
authors: Choe
mesh_terms: D003722:Dental Alloys; D003764:Dental Materials; D004563:Electrochemistry / Q000379:methods*; D006195:Hafnium / Q000737:chemistry*; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D013635:Tantalum / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D003722:Dental Alloys; D003764:Dental Materials; D013635:Tantalum; D014025:Titanium; D006195:Hafnium