A5075469659- Nuclear Materials and Properties
- Fusion materials and technologies
- High-Temperature Coating Behaviors
- Welding Techniques and Residual Stresses
- Additive Manufacturing Materials and Processes
- Advanced Materials Characterization Techniques
- Metal and Thin Film Mechanics
- Semiconductor materials and interfaces
- Microstructure and Mechanical Properties of Steels
- High Entropy Alloys Studies
- Graphene research and applications
- Chalcogenide Semiconductor Thin Films
- Nuclear materials and radiation effects
- Advanced materials and composites
- Nanowire Synthesis and Applications
- Hydrogen embrittlement and corrosion behaviors in metals
- Anodic Oxide Films and Nanostructures
- Catalytic Processes in Materials Science
- Advanced Surface Polishing Techniques
- Machine Learning in Materials Science
- Diamond and Carbon-based Materials Research
- High Temperature Alloys and Creep
- Nuclear Physics and Applications
- Advancements in Battery Materials
- Graphene and Nanomaterials Applications
Chalmers University of Technology
2020-2024
Cr-coated Optimized ZIRLO™ cladding material fabricated with the cold-spray deposition process is studied. Microstructure and chemistry of this are investigated before after exposure to autoclave corrosion testing scanning electron microscopy, energy dispersive spectroscopy analysis, backscattered diffraction, transmission microscopy atom probe tomography. The results used assess what changes have occurred upon exposure. formation a compact, 80 – 100 nm thick Cr2O3 layer observed on surface...
The performance of Cr-coated Optimized ZIRLO™ as accident tolerant fuel cladding material for pressurized water reactors (PWRs) is assessed. coating oxidation mechanisms, oxide stability, and the transformation Cr-coating/Optimized interface are among studied phenomena. For this purpose, samples were exposed at 1200°C in steam 3 min, 20 min 40 min. As-fabricated coated claddings, plus specimens tested autoclave 415°C 90 days simulated PWR chemistry employed comparison. Characterization...
This study addresses the critical need for a constitutive model to analyze cyclic plasticity of additively manufactured 316L stainless steel. The anisotropic behavior at both room temperature and 300°C is investigated experimentally based on hysteresis loops performed in different orientations with respect build direction. A comprehensive proposed, that integrates Armstrong-Frederick nonlinear kinematic hardening, Voce isotropic hardening Hill's yield criterion within 3D return mapping...
As-produced Cr-coated Optimized ZIRLO™ cladding material fabricated with the cold-spray (CS) deposition process is studied. Cross-sectional electron microscopy, nano-hardness profiling, transmission Kikuchi diffraction, and atom probe tomography (APT) were performed to investigate nature of CS Cr-coating/Optimized interface, microstructure coating, effects on Zr-substrate microstructure. The former surface was found have a highly deformed nano-crystalline microstructure, formation which...
Proton irradiation with a primary ion energy of 2 MeV was used to simulate radiation damage in UN and (U,Zr)N fuel pellets. The pellets, nominally at room temperature, were irradiated peak levels 0.1, 1, 10 dpa 100 resulting hydrogen concentration most 1 at. %. Microstructure mechanical properties the samples investigated compared before after irradiation. induced an increase hardness, whereas decrease Young's modulus observed for both samples. Microstructural characterization revealed...
Powder Bed Fusion – Laser Beam (PBF-LB) of high γ' strengthened Ni-base superalloys, such as CM247LC, is great interest for temperature applications in gas turbines. However, PBF-LB CM247LC challenging due to the cracking susceptibility during processing (solidification cracking) and heat treatment (strain age cracking, mostly caused by residual stresses). This study focuses on understanding impact process parameters microstructure, stresses solidification cracking. power (P), speed (v)...
The accident tolerant fuel (ATF) concept has emerged in the years after 2011 Fukushima as part of a renewed effort research for light water reactors. primary focus is to further improve safety measures under and beyond design basis conditions, cladding performance normal operation. application coating on zirconium claddings can achieve both these aims without extensive changes reactor design. Metallic chromium coatings have been profusely studied solution pressurized reactors, but search an...
Abstract In this work, samples of chromia (Cr2O3) scale have been prepared for atom probe tomography and field evaporated with deep ultraviolet laser light (258 nm wavelength). The investigated range energies spans more than three orders magnitude between 0.03 90 pJ. Furthermore, the effects detection rate temperature were investigated. Simultaneous voltage pulses employed on additional needle specimens to reduce standing minimize background noise during measurement. Smooth evaporation...
The development of coatings for accident-tolerant fuels (ATFs) light water reactor (LWR) applications promises improved corrosion resistance under accident conditions and better performances during operation. CrN TiN are characterized by high wear coupled with good properties. They generally used to protect materials in where extreme involved represent promising candidates ATF. Zr cladding tubes coated 5 µm-thick or TiN, exposed an autoclave simulated PWR chemistry BWR chemistry, were SEM,...
Mono- to few-layer graphene materials are successfully synthesized multiple times using Cu-Ni alloy as a catalyst after single-chemical vapor deposition (CVD) process. The synthesis is realized by extracting carbon source pre-dissolved in the substrate. Firstly, grown CVD method on substrates. Secondly, same Cu-Nicatalyst foils annealed, absence of any external precursor, grow atoms during This annealing process repeated synthesize until exhausted foils. After growth and each process,...
Employing alloy anodes based on Si, Ge, Sn, etc. can increase the energy density of lithium-ion batteries (LIBs) by their high gravimetric capacity. 1 Their large volumetric expansion during lithiation, however, leads to cracks and solid electrolyte interphase (SEI) breakdown, followed pulverization. 2 Alloy engineering, creating composite alloys via ball milling e.g. an active Si-phase embedded in inactive matrix buffer volume expansion, is one alternative approach/remedy. 3-6 But...
In this study, neutron diffraction and transmission electron microscopy (TEM) have been implemented to study the crystallographic structure of ternary phase U2CrN3 from pellet nano scale respectively. Recently microstructural evaluation has performed for first time in condition, overcoming Cr evaporation issue during conventional sintering process. work time, ordered phase, stabilized obtained by implementing diffraction. For pellets composite material UN with 20 vol% CrN were fabricated...