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518 results on '"Choe, Han-Cheol"'

144. Ultra-Fine HAp Nanoparticles Synthesized Onto TiO2 Barrier-Type Oxide Film for Biocompatibility

Author

Choe Han‐Cheol, Kim Seung‐Hee, Jeong Byeong‐Ho, Jang Jae‐Myung, Chung Sang‐Won, Shin Dae‐Hyun, and Kim Young‐Rae

Subjects
chemistry.chemical_compound, Materials science, Biocompatibility, chemistry, Biomedical Engineering, Oxide, Nanoparticle, General Materials Science, Bioengineering, Nanotechnology, General Chemistry, Ultra fine, Condensed Matter Physics
Published
2017
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149. Nanosized Hydroxyapatite Precipitation on the Ti—30Ta—xHf Alloys

Author

Lee Kang, Jang Jae‐In, and Choe Han‐Cheol

Subjects
Materials science, Precipitation (chemistry), Anodizing, Metallurgy, Biomedical Engineering, Bioengineering, General Chemistry, Condensed Matter Physics, Alkali metal, Electrochemistry, Crystallinity, Chemical engineering, Phase (matter), General Materials Science, Layer (electronics), Deposition (law)
Abstract

In this study, we prepared hydroxyapatite (HAp) layer on the alkali treated Ti–30Ta–xHf alloys using electrochemical deposition method. Ti–30Ta–xHf alloys was anodized in 5 M NaOH solution at 0.3 A for 10 min. Alkali treated Ti–30Ta–xHf surface formed by anodization step which acted as templates and anchorage for growth of the HAp during subsequent pulsed electrochemical deposition process at 85 °C. The phase and morphologies of deposited HAp layer were affected by the Hf contents of Ti–30Ta–xHf alloys. The nano-scale rod-like HAp layer was formed on untreated Ti–30Ta–xHf alloys with partially low crystallinity. In the case of alkali treated Ti–30Ta–xHf, nano-sized needle-like layers were transferred to nano-flake surface and denser morphology as Hf content increased.

Published
2018

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