Kyosuke Ueda
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View article: Exceptional balance of strength and ductility in biomedical Co–Cr–W–Ni alloy with added carbon
Exceptional balance of strength and ductility in biomedical Co–Cr–W–Ni alloy with added carbon Open
This study investigated the effects of carbon addition on the mechanical properties and microstructural evolution of biomedical Co-20Cr-15W-10Ni (mass%, CCWN) alloys during plastic deformation. CCWN alloys with carbon contents of 0, 0.05, …
View article: Probing plastic deformation-related properties in static recrystallized Co–Cr–Fe–Ni–Mo alloy for biomedical applications
Probing plastic deformation-related properties in static recrystallized Co–Cr–Fe–Ni–Mo alloy for biomedical applications Open
40Co–20Cr–16Fe–15Ni–7Mo (mass%, Co–Cr–Fe–Ni–Mo) alloys are currently used in biomedical implants such as balloon-expandable stents. Materials used as balloon-expandable stents are statically recrystallized and subsequently utilized within …
View article: Systematic Study on the Microstructures of Biomedical Co–20Cr–15W–10Ni Alloys with Carbon Contents Ranging from 0 to 0.2 mass pct
Systematic Study on the Microstructures of Biomedical Co–20Cr–15W–10Ni Alloys with Carbon Contents Ranging from 0 to 0.2 mass pct Open
Herein, the effect of carbon content on the microstructures of Co–20Cr–15W–10Ni (mass pct, CCWN) alloys was systematically studied. For this, CCWN alloys with carbon contents of 0, 0.05, 0.10, and 0.20 mass pct, i.e. , 0C, 0.05C, 0.10C, an…
View article: Innenrücktitelbild: Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross‐Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples (Angew. Chem. 2/2024)
Innenrücktitelbild: Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross‐Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples (Angew. Chem. 2/2024) Open
Dual catalysis of gold nanoclusters protected by thiolate ligands toward photocatalytic cross-dehydrogenative coupling between aliphatic tertiary amines and terminal alkynes is reported by Katsuhiro Isozaki, Masaharu Nakamura et al. in the…
View article: Inside Back Cover: Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross‐Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples (Angew. Chem. Int. Ed. 2/2024)
Inside Back Cover: Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross‐Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples (Angew. Chem. Int. Ed. 2/2024) Open
Dual catalysis of gold nanoclusters protected by thiolate ligands toward photocatalytic cross-dehydrogenative coupling between aliphatic tertiary amines and terminal alkynes is reported by Katsuhiro Isozaki, Masaharu Nakamura et al. in the…
View article: Improvement of Work-Hardening Behavior of Co-Cr-W-Ni Alloy by Adding Mn/Fe for Balloon-Expandable Stents
Improvement of Work-Hardening Behavior of Co-Cr-W-Ni Alloy by Adding Mn/Fe for Balloon-Expandable Stents Open
The Co-20Cr-15W-10Ni (CCWN, mass%) alloy, registered as American society of testing and materials (ASTM) F90, has been widely used as a balloon-expandable stent because of its excellent balance between its mechanical properties and corrosi…
View article: Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross‐Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples**
Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross‐Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples** Open
Thiolate‐protected gold nanoclusters (AuNCs) have attracted significant attention as nano‐catalysts, revealing a superatomic core and gold‐thiolate staples as distinct structural units. Here, we demonstrate the unprecedented dual catalytic…
View article: Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross‐Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples**
Dual Catalysis of Gold Nanoclusters: Photocatalytic Cross‐Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples** Open
Thiolate‐protected gold nanoclusters (AuNCs) have attracted significant attention as nano‐catalysts, revealing a superatomic core and gold‐thiolate staples as distinct structural units. Here, we demonstrate the unprecedented dual catalytic…
View article: Dual Catalysis of Gold Nanoclusters:Photocatalytic Cross-Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples
Dual Catalysis of Gold Nanoclusters:Photocatalytic Cross-Dehydrogenative Coupling by Cooperation of Superatomic Core and Molecularly Modified Staples Open
Thiolate-protected gold nanoclusters (AuNCs) have attracted significant attention as nano-catalysts, revealing a superatomic core and gold-thiolate staples as distinct structural units. Here, we demonstrate the unprecedented dual catalytic…
View article: Effect of Niobium and Oxygen Contents on Microstructure and Mechanical Properties of α+β-Type Ti–(5–25)Nb–(0.5–1)O (mass%) Alloys for Biomedical Applications
Effect of Niobium and Oxygen Contents on Microstructure and Mechanical Properties of α+β-Type Ti–(5–25)Nb–(0.5–1)O (mass%) Alloys for Biomedical Applications Open
The microstructures, mechanical properties, and biocompatibilities of α+β-type Ti–Nb–O alloys with a wide range of Nb and oxygen contents were investigated. Ingots of Ti–(5–25)Nb–(0.5–1)O (mass%) alloys were prepared by arc melting and hot…
View article: Antibacterial Properties of TiO<sub>2</sub> Layers Formed by Au-Sputtering and Thermal Oxidation of Titanium under Visible Light
Antibacterial Properties of TiO<sub>2</sub> Layers Formed by Au-Sputtering and Thermal Oxidation of Titanium under Visible Light Open
To prevent infection in dental implants using photocatalytic activity under visible-light irradiation, the fabrication of Au-added TiO2 layers on Ti substrates and their antibacterial properties were studied. Pure Au and Ti–(60, 40) mol%Au…
View article: Analysis of the Oxidation and Nitridation of Ti-17 (Ti-5Al-2Sn-2Zr-4Mo-4Cr) Alloys with Added Si under Atmospheric Heating
Analysis of the Oxidation and Nitridation of Ti-17 (Ti-5Al-2Sn-2Zr-4Mo-4Cr) Alloys with Added Si under Atmospheric Heating Open
We investigated the oxidation and nitridation of a near β-type Ti-17 (Ti-5Al-2Sn-2Zr-4Mo-4Cr) alloy with up to 1 mass% of added Si. The alloys were heated in air at 923–1223 K for up to 518.4 ks. The mass gain was determined, and the scale…
View article: Flexible and Tough Superelastic Co–Cr Alloys for Biomedical Applications
Flexible and Tough Superelastic Co–Cr Alloys for Biomedical Applications Open
The demand for biomaterials has been increasing along with the increase in the population of elderly people worldwide. The mechanical properties and high wear resistance of metallic biomaterials make them well‐suited for use as substitutes…
View article: Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents
Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents Open
This is the first report presenting the development of a Co–Cr–W–Ni–Mn alloy by adding 6 mass pct Mn to ASTM F90 Co–20Cr–15W–10Ni (CCWN, mass pct) alloy for use as balloon-expandable stents with an excellent balance of mechanical propertie…
View article: Effect of Precursor Deficiency Induced Ca/P Ratio on Antibacterial and Osteoblast Adhesion Properties of Ag-Incorporated Hydroxyapatite: Reducing Ag Toxicity
Effect of Precursor Deficiency Induced Ca/P Ratio on Antibacterial and Osteoblast Adhesion Properties of Ag-Incorporated Hydroxyapatite: Reducing Ag Toxicity Open
Ag-containing hydroxyapatite (HA) can reduce risks associated with bacterial infections which may eventually require additional surgical operations to retrieve a failed implant. The biological properties of HA in such applications are stro…
View article: Improvement of Mechanical Properties by Microstructural Evolution of Biomedical Co–Cr–W–Ni Alloys with the Addition of Mn and Si
Improvement of Mechanical Properties by Microstructural Evolution of Biomedical Co–Cr–W–Ni Alloys with the Addition of Mn and Si Open
We investigated changes in the microstructure and mechanical properties of biomedical Co-20Cr-15W-10Ni alloys (mass%) containing 8 mass% Mn and 0-3 mass% Si due to hot forging, solution treatment, cold swaging, and static recrystallization…
View article: Crystallographic orientation control of pure chromium via laser powder bed fusion and improved high temperature oxidation resistance
Crystallographic orientation control of pure chromium via laser powder bed fusion and improved high temperature oxidation resistance Open
This is the first comprehensive study on the development of a cubic crystallographic texture in pure chromium (Cr) manufactured using laser powder bed fusion (LPBF) with different laser energy densities to alter its microstructure and high…
View article: Precipitation during γ-ε Phase Transformation in Biomedical Co-Cr-Mo Alloys Fabricated by Electron Beam Melting
Precipitation during γ-ε Phase Transformation in Biomedical Co-Cr-Mo Alloys Fabricated by Electron Beam Melting Open
We studied the precipitates that were induced during γ-ε phase transformation in biomedical Co-28Cr-6Mo (mass%) alloys that were fabricated by electron beam melting with carbon contents of 0.184 and 0.018 mass%. In the high-C as-built allo…