Surface Modification of Titanium Alloys by Coating with Anatase-Type TiO2

Commercially pure titanium plates/coupons and pure titanium powders were soaked for 24 h in 5 M NaOH and 5 M KOH solutions, under identical conditions, over the temperature range of 37° to 90°C. Wettability of the surfaces of alkali-treated cpTi coupons were studied by using contact angle goniometry. cpTi coupons soaked in 5 M NaOH or 5 M KOH solutions were found to have hydrophilic surfaces. Hydrous alkali titanate nanofibers and nanotubes were identified with SEM/EDXS and grazing incidence XRD. Surface areas of Ti powders increased >50–220 times, depending on the treatment, when soaked in the above solutions. A solution was developed to coat amorphous calcium phosphate, instead of hydroxyapatite, on Ti coupon surfaces. In vitro cell culture tests were performed with osteoblast-like cells on the alkali-treated samples.

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“…Previous studies [28–36] were not designed to study the effect of temperature alone in comparing NaOH versus KOH treatments.…”

Section: Resultsmentioning

confidence: 99%

“…5 M KOH treatment of Ti was then independently repeated by Ito et al . [28], Tanaka et al . [29], Lee et al .…”

Section: Introductionmentioning

confidence: 99%

Comparison of titanium soaked in 5M NaOH or 5M KOH solutions

Kim

Kendall

Miller

et al. 2013

Materials Science and Engineering: C

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“…The color of the specimen was quantitatively evaluated by colorimetry using Table 2 shows measured L*, a* and b* values for samples (1) and 3shown in Figure 1. As shown in Table 2, the value of L* decreased significantly and both a* and b* decreased to near zero.…”

Section: Characterization Of the Titanium Sheet After Anodization Andmentioning

confidence: 99%

“…Titanium exhibits good corrosion resistance due to the highly protective titanium oxide layer formed on its surface. Titanium oxides have another important feature: photocatalytic activity under irradiation by ultraviolet (UV) light [1].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Surface Oxide Layers on Black-Colored Titanium

Kaneko¹,

Tokuno²,

Yamagishi³

et al. 2018

JSEMAT

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Black-colored titanium was obtained by anodic oxidation of a commercially pure grade-1 titanium sheet in a 0.06 M NH 4 NO 3 solution, followed by heat treatment at 773 K for 1 h in a vacuum furnace. The resulting oxide layer on the titanium substrate was examined by X-ray photoelectron spectroscopy, X-ray diffraction, glow discharge spectroscopy, and scanning electron microscopy. It was found that the oxide layer on the black-colored titanium sheet was several micrometers thick and mainly consisted of rutile TiO 2 exhibiting a sponge like nanoporous structure. It is considered that the black-colored appearance of the titanium sheet is due to the sponge like nanoporous structure of the oxide layer absorbing the incident light. The photocatalytic activity of the black-colored titanium sheet was examined by observing the decomposition of a methylene blue (MB, C 16 H 18 N 3 SCl) solution under ultraviolet irradiation due to the existence of rutile TiO 2. The sheet also exhibited photocatalytic activity under visible light irradiation. It is believed that the photocatalytic response upon irradiation with white light is due to carbon doping of the titanium oxide layer on the titanium substrate.

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Surface Modification of Titanium Alloys by Coating with Anatase-Type TiO2

Cited by 2 publications

References 3 publications

Comparison of titanium soaked in 5M NaOH or 5M KOH solutions

Comparison of titanium soaked in 5M NaOH or 5M KOH solutions

Characterization of Surface Oxide Layers on Black-Colored Titanium

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