Photocatalytic approaches, that is the reaction of light-produced charge carriers at a semiconductor surface with their environment, currently attract an extremely wide scientific interest. This is to a large extent due to the high expectations: i) to convert sunlight directly into an energy carrier (H(2)), ii) to stimulate chemical synthetic reactions, or iii) to degrade unwanted environmental pollutants. Since the early reports in 1972, TiO(2) has been the most investigated photocatalytic material by far; this originates from its outstanding electronic properties that allow for a wide range of applications. Not only the material, but also its structure and morphology, can have a considerable influence on the photocatalytic performance of TiO(2). In recent years, particularly 1D (or pseudo 1D) structures such as nanowires and nanotubes have received great attention. The present Review focuses on TiO(2) nanotube arrays (and similar structures) that grow by self-organizing electrochemistry (highly aligned) from a Ti metal substrate. Herein, the growth, properties, and applications of these tubes are discussed, as well as ways and means to modify critical tube properties. Common strategies are addressed to improve the performance of photocatalysts such as doping or band-gap engineering, co-catalyst decoration, junction formation, or applying external bias. Finally, some unique applications of the ordered tube structures in various photocatalytic approaches are outlined.

A Review of Photocatalysis using Self-organized TiO2 Nanotubes and Other Ordered Oxide Nanostructures

Mechanical behavior of high-entropy alloys

/pdf/dislocations-in-solids-1gaufoliyg.pdf

Dislocations in solids

The files uploaded here constitute the raw data files for the experimental results presented in the paper named above. SEM BSE images and EDX maps are provided. TEM BF images and SADPs are also provided. Some additional SEM EDX maps are given, which were not presented in the paper, that further support the statements made in the paper. The raw .dm3 picture files generated from the Osiris microscope are available. Raw INCA .ipj files are also included. Readme files are included in where appropriate.
 
The dataset will be updated with publication details.
 
The article associated with this dataset can be found on the Cambridge University Repository at https://www.repository.cam.ac.uk/handle/1810/251467

Research data supporting: "Precipitation in the Equiatomic High-Entropy Alloy CrMnFeCoNi"

Boosted by the success of high-entropy alloys (HEAs) manufactured by conventional processes in various applications, the development of HEAs for 3D printing has been advancing rapidly in recent years. 3D printing of HEAs gives rise to a great potential for manufacturing geometrically complex HEA products with desirable performances, thereby inspiring their increased appearance in industrial applications. Herein, a comprehensive review of the recent achievements of 3D printing of HEAs is provided, in the aspects of their powder development, printing processes, microstructures, properties, and potential applications. It begins with the introduction of the fundamentals of 3D printing and HEAs, as well as the unique properties of 3D-printed HEA products. The processes for the development of HEA powders, including atomization and mechanical alloying, and the powder properties, are then presented. Thereafter, typical processes for printing HEA products from powders, namely, directed energy deposition, selective laser melting, and electron beam melting, are discussed with regard to the phases, crystal features, mechanical properties, functionalities, and potential applications of these products (particularly in the aerospace, energy, molding, and tooling industries). Finally, perspectives are outlined to provide guidance for future research.

Recent Advances on High‐Entropy Alloys for 3D Printing

A review on fundamental of high entropy alloys with promising high–temperature properties

Growth, structure and photocatalytic properties of hierarchical Cu–Ti–O nanotube arrays by anodization

The effect of Sc content on microstructure and properties of Al-Zn-Mg-Cu-Zr alloy was studied by transmission electron microscopy (TEM), scanning electron microscopy (SEM), optical microscopy (OM), tensile tests, hardness measurements and corrosion evaluation. It is revealed that the increase in the volume fraction of the η' phase and the precipitation of Al3(Sc, Zr) particles within the alloy contribute to the significant grain refinement within the Al-7.0Zn-3.0 Mg-0.3Cu-0.15Sc-0.12 Zr (wt.%) alloy. The strength and hardness of the alloy have also been improved. Due to the addition of Sc element, the precipitates at the grain boundaries of the alloy become discontinuous, and the size of such precipitates is reduced. The population density is also decreased. Consequently, the alloy has excellent resistance to intergranular corrosion and exfoliation corrosion. Electrochemical data also shows that the alloys have a smaller tendency to corrode and slower corrosion rates.

Effect of Sc content on microstructure and properties of Al-Zn-Mg-Cu-Zr alloy

To improve the low compactness and limited size of powder metallurgy (P/M) aluminum alloy materials, cold rolling deformation on P/M aluminum alloy was carried out in this work. And the microstructure and mechanical properties of P/M aluminum alloy during cold rolling were investigated from multi-dimensional and multi-scale perspectives. The results indicate that the microstructure gradually evolved from the original equiaxial structure to the fiber structure after cold rolling. Also, the grain size decreased with an increase in cumulative reductions. When the cumulative reduction was increased from 0 to 80%, the relative density and tensile strength of the samples increased from 98.31% to 221.94 MPa to 99.04% and 302.88 MPa, respectively. On this basis, the synergetic effect of microstructure densification and deformation strengthening of the P/M 2024 Al alloy during cold rolling was investigated. The improved mechanical properties mainly resulted from the combined effects of the increased microstructural compactness and deformation strengthening.

Bing Liu

Papers

A review on fundamental of high entropy alloys with promising high–temperature properties

Growth, structure and photocatalytic properties of hierarchical Cu–Ti–O nanotube arrays by anodization

Effect of Sc content on microstructure and properties of Al-Zn-Mg-Cu-Zr alloy

Microstructure and mechanical properties of powder metallurgy 2024 aluminum alloy during cold rolling

Microstructure evolution and performances of Al-0.7Mg-0.6Si-0.2Ce-X (X=Sc, Y and Zr) alloys with high strength and high electrical conductivity