A5023673320- Metal and Thin Film Mechanics
- Hydrogen Storage and Materials
- Advanced Materials Characterization Techniques
- Hydrogen embrittlement and corrosion behaviors in metals
- Muon and positron interactions and applications
- Fusion materials and technologies
- Catalytic Processes in Materials Science
- Catalysts for Methane Reforming
- Copper Interconnects and Reliability
- Aluminum Alloy Microstructure Properties
- Aluminum Alloys Composites Properties
- Corrosion Behavior and Inhibition
- Intermetallics and Advanced Alloy Properties
- Plasma Diagnostics and Applications
- Carbon dioxide utilization in catalysis
- Nuclear Materials and Properties
- Microstructure and mechanical properties
- Ammonia Synthesis and Nitrogen Reduction
- Diamond and Carbon-based Materials Research
- Metallic Glasses and Amorphous Alloys
- Nuclear Physics and Applications
- Semiconductor materials and devices
- Asymmetric Hydrogenation and Catalysis
- Advanced Chemical Physics Studies
- Magnesium Alloys: Properties and Applications
Tokai University
2017-2024
University of Göttingen
2007-2022
King Abdullah University of Science and Technology
2012-2020
Abstract As hydrogen is touted as a key player in the decarbonization of modern society, it critical to enable quantitative (H) analysis at high spatial resolution and, if possible, atomic scale. H has known deleterious impact on mechanical properties (strength, ductility, toughness) most materials that can hinder their use part infrastructure hydrogen-based economy. Enabling mapping including local concentration analyses specific microstructural features essential for understanding multiple...
Various defect studies of hydrothermally grown (0001) oriented ZnO crystals electrochemically doped with hydrogen are presented. The content in the is determined by nuclear reaction analysis and it found that already 0.3at.% H exists chemically bound form virgin crystals. A single positron lifetime 182ps detected attributed to saturated trapping at Zn vacancies surrounded atoms. It demonstrated a very high amount (up ∼30at.%) can be introduced into electrochemical doping. More than half this...
The aim of the present work was to investigate microstructure bulk niobium irradiated by 10 MeV electrons. Positron-annihilation spectroscopy employed as a principal technique for characterization irradiation-induced defects. Experimental results were compared first-principles theoretical calculations positron characteristics. In addition extended positron-annihilation studies, specimens characterized also x-ray diffraction. It found that vacancies are surrounded hydrogen. Complexes...
Abstract The effect of Mn addition on the microstructure, thermal and mechanical properties in as-cast cold-rolled Al–Sc–Zr alloys was studied. Electrical resistometry, differential scanning calorimetry microhardness measurements were used. Transmission electron microscopy, backscatter diffraction X-ray specimens quenched from temperatures pronounced changes resistivity helped to identify microstructural processes responsible for changes. distinct increase observed after annealing above...
The influence of tuning the laser pulse energy during analyses on resulting microstructure in a specimen utilizing an ultra-fast assisted atom probe was demonstrated by case study binary Al-Li alloy. decomposition parameters, such as size, number density, volume fraction, and composition δ' precipitates, were carefully monitored after each analysis. A simple model employed to estimate corresponding temperature for value energy. results indicated that temperatures range 10 80 pJ are located...
Abstract Hydrogen absorbed in crystalline solids causes a lattice expansion and the formation of hydride phases. Contrary to free standing bulk samples, thin films are fixed at substrates, which prevent their in‐plane expansion. This makes hydrogen‐induced highly anisotropic leads high stresses hydrogen loaded films. As consequence, defects may be created with hydrogen. work reports about by loading epitaxial Pd deposited on Al 2 O 3 substrates cold cathode beam sputtering. Hydrogen‐induced...
Hydrogen absorbing alloys have attracted great attention because they are a safe and efficient media for transporting hydrogen energy.AB, AB2, AB5, A2B-type storage compounds related substituted multi-component been proposed.In general, titanium-based among the most promising materials storage.Among various available types of metal hydrides, AB2 type Ti-Cr-based candidates.In particular, there many methods improving sorption properties.One them is to prepare by mechanical alloying (MA).MA...
Hydrogen loading causes a significant volume expansion, which is isotropic in free-standing bulk materials. Contrary to samples, thin films are clamped an elastically stiff substrate, prevents in-plane expansion. Hence, expansion of film strongly anisotropic because it expands only the out-of-plane direction. High internal stresses introduced during hydrogen may lead situation when detachment from substrate energetically favorable. In present work, we studied hydrogen-induced buckling Pd...