A5101940490- Corrosion Behavior and Inhibition
- Concrete Corrosion and Durability
- Hydrogen embrittlement and corrosion behaviors in metals
- Non-Destructive Testing Techniques
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Electrodeposition and Electroless Coatings
- Smart Materials for Construction
- Metal and Thin Film Mechanics
- Welding Techniques and Residual Stresses
- High-Temperature Coating Behaviors
- Bone Tissue Engineering Materials
- Titanium Alloys Microstructure and Properties
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Anodic Oxide Films and Nanostructures
- Material Properties and Applications
- Metallurgical Processes and Thermodynamics
- Nuclear Materials and Properties
- Fuel Cells and Related Materials
- Aluminum Alloys Composites Properties
- Surface Roughness and Optical Measurements
- Aluminum Alloy Microstructure Properties
- Semiconductor materials and interfaces
- Metal Alloys Wear and Properties
Shibaura Institute of Technology
2013-2023
Nihon University
2022
Koto Hospital
2013
Toyo Engineering (Japan)
2013
National Institute for Materials Science
2000-2012
SVUM (Czechia)
2005
Tokyo University of Science
2004
Nippon Steel (Japan)
2004
Institute of Metal Research
1999-2000
National Research Institute
2000
Titanium (Ti) is always covered by thin passive films. Thus, valence band (VB) spectra, obtained using X‐ray photoelectron spectroscopy (XPS), are superpositions of the VB spectra films and that metallic Ti substrate. In this study, to obtain only films, angular resolution (for eliminating substrate contribution) argon ion sputtering removing films) were used along with XPS. The film on was determined consist a very TiO 2 layer small amounts O 3 , TiO, hydroxyl groups, water thickness 5.9...
Ti surfaces must exhibit antibacterial activity without cytotoxicity to promote bone reconstruction and prevent infection simultaneously. In this study, we employed a two-step electrochemical treatment process, namely, microarc oxidation (MAO) cathodic deposition (CED), modify surfaces. During the MAO step, porous TiO2 (pTiO2) layer with surface roughness of approximately 2.0 μm was generated on surface, in CED Cu deposited onto pTiO2 forming Cu@pTiO2. Cu@pTiO2 exhibited similar structure,...
The objective of this study was to investigate the effect active hydroxyl groups on a titanium (Ti) surface bond strength between Ti and segmented polyurethane (SPU) composite through gamma-mercapto propyl trimethoxysilane (gamma-MPS). Active oxide were controlled by immersion in hydrogen peroxide (H2O2) with different lengths time, resulting concentrations evaluated using zinc-complex substitution technique. For H2O2-treated Ti, it characterized X-ray photoelectron spectroscopy scanning...
AC impedance method has been applied to atmospheric corrosion monitoring under thin film of artificial seawater. An sensor, which consists a pair identical electrodes embedded concentrically in epoxy resin, was used for measuring the rates. The instaneous rates carbon steel atmosphere 60% 95% Relative Humidity (RH) have monitored by continuous measurements at 10 mHz and kHz. water including 0.1 kg/m2 salt showed highest rate 60%RH. Above 70%RH, however, liquid 0.01 gave largest rate. average...
The roughness and cleanness of a titanium surface must be controlled in order to investigate the expression mechanism hard tissue compatibility on titanium. In this study, osteogenic MC3T3-E1 cells were cultured differentiation-induced bulk sputter-deposited specimens, osteogenesis investigated. For preparation discs mirror-polished. On other hand, was smooth clean cover glasses as specimens. As result, no significant difference observed cell morphology attached number. time showing maximum...
Low-alloy steel foils of 20 μm thick were corroded under a cyclic wet-and-dry condition simulating highly corrosive coastal environment. Compositions Fe-1 mass%Co, Fe-3 mass%Ni and Fe-0.8 mass%Al selected as testing materials because they thought to be basic alloys weathering steels for the use in environments. The entirely transformed into rust form membranes by processing more than cycles. carefully attached dual-compartment cell measurement membrane potential. Membrane potential generated...
The objective of this study was to investigate the effect UV irradiation on shear bond strength between a titanium (Ti) and segmented polyurethane (SPU) composite through γ-mercapto propyl trimethoxysilane (γ-MPS). To end, Ti/SPU interface Ti-SPU under varying conditions ultraviolet ray (UV) evaluated by test. glass transition temperatures SPU with without were also determined using differential scanning calorimetry. It found that increased irradiation. However, excessive decreased...
The effect of the thermal history on microstructural changes in aluminized and Pt-aluminized Ni-based single-crystal superalloys was investigated. superalloy substrates were first electropolished to get rid residual surface strain. Then, Pt electrodeposited vacuum annealing conducted for some substrates, specimens prepared using conventional aluminizing process. It found that specimens, voids formed vicinity substrate/coating interfaces during cyclic heating, whereas secondary diffusion...
The iron rust phase has been analyzed by using the in-situ XRD and alternating current (AC) impedance methods after wet/dry corrosion test NaCl-MgCl2 complex which is main composition of airborne saline particles. mass gain carbon steel depends on concentration Cl ion from environment in chamber, it does not depend type cations (NaCl or MgCl2). As increases, content β-FeOOH increases phases. transition green I (G.R.I) was observed directly XRD. amount G.R.I ion, transformed automatically...