Sol-Gel Derived Functionally Graded TiO2/HAP Films on Ti-6Al-4V Implants |
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| Authors: | Yong-Mu Lim Kyu-Seog Hwang Yeong-Joon Park |
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| Institution: | (1) Department of Ophthalmic Optics, Kwangju Health College, 638-8 Shinchang-dong, Kwangsan-gu, Kwangju, 506-306, Republic of Korea;(2) School of Automotive Mechanical Engineering, Nambu University, 864-1 Wolgye-dong, Kwangsan-gu, Kwangju, 506-302, Republic of Korea;(3) Department of Dental Materials & Dental Materials Research Institute, College of Dentistry, Chonnam National University, 5 Hak 1-dong, Dong-gu, Kwangju, 501-190, Republic of Korea |
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| Abstract: | Functionally graded TiO2/HAP coatings were prepared on Ti6Al4V implants by sol-gel process using calcium nitrate and phosphoric acid dissolved in ethylene glycol monomethyl ether, and titanium isopropoxide chelated by acethylacetone, isopropanol and water as starting materials. TiO2/HAP coating sols with variable HAP concentrations from 0% to 100% at 10% intervals were orderly spin coated on the substrates and pyrolyzed at 500°C in air. Well-crystallized HAP coatings between coating and substrate confirmed by X-ray diffraction and field emission-scanning electron microscopy were obtained by final annealing at 500°C in argon. In this work, bioactivities of the coating were studied by examining the variation of ion concentration of Ca and P in simulated body fluid after soaking using an inductively coupled plasma-atomic emission spectrometer. Coating surfaces after soaking in simulated body fluid indicated significant morphological changes by field emission-scanning electron microscopy. |
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| Keywords: | TiO2/HAP coating Ti6Al4V sol-gel process simulated body fluid |
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