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Distance Learning at the MS and PhD Levels in the nuclear and Radiation engineering program, nuclear and Applied Robotics, materials science and engineering and Walker department of Mechanical engineering at the University of Texas at Austin

Distance Learning at the MS and PhD Levels in the Nuclear an...

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2023 Transactions of the American nuclear Society Winter Conference and Expo, ANS 2023

作者： Landsberger1, Sheldon Charlton, William Clamo, Kevin Ezekoye, Ofodike Kovar, Desiderio Haas, Derek Pryor, Mitchell University of Texas at Austin Nuclear and Radiation Engineering Program Nuclear Engineering Teaching Lab 10100 Burnet Road Pickle Research Campus R-9000 AustinTX United States Walker Department of Mechanical Engineering University of Texas at Austin 204.Dean Keeton ETC II 5.160 AustinTX United States The University of Texas at Austin Materials Science and Engineering Walker Department of Mechanical Engineering 204 Dean Keeton ETC II 5.100 AustinTX United States

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A high-entropy rare-earth phosphate and its principle single component REPO_(4)for environmental barrier coatings

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Journal of Advanced Ceramics 2025年第3期14卷 103-119页

作者： Bishnu Pada Majee Keith Bryce Liping Huang Jie Lian Department of Materials Science and Engineering Rensselaer Polytechnic InstituteNY 12180USA Department of Mechanical Aerospace and Nuclear EngineeringRensselaer Polytechnic InstituteNY 12180USA

Xenotime rare-earth(RE)phosphates are emerging as promising materials for environmental barrier coatings(EBCs)for SiC-based ceramic-matrix composites(CMCs)because of their close coefficients of thermal expansion(CTEs)and resistance to calcium-magnesium-alumina-silicate(CMAS)*** this work,high-entropy(HE)(Sc_(0.2)Lu_(0.2)Yb_(0.2)Er_(0.2)Y_(0.2))PO_(4) and five single-component REPO4(RE=Sc,Lu,Yb,Er,and Y)compounds were synthesized,and their stability,thermal properties,and CMAS corrosion resistance were *** CTE values of four REPO_(4) compounds(RE=Lu,Yb,Er,and Y;~(5.6-6)×10^(−6)℃^(−1))are close to those of SiC-CMC((4.5-5.5)×10^(−6)℃^(−1)),whereas ScPO_(4)(6.98×10^(−6)℃^(−1))and HE(5RE_(0.2))PO_(4)(6.39×10^(−6)℃^(−1))have slightly higher values in the temperature range of 200-1300℃.HE phosphate has the lowest thermal conductivity due to its size and mass *** CMAS corrosion tests at 1300℃ for 5,45,and 96 h revealed that all RE phosphates formed a continuous and dense reaction layer predominantly composed of Ca_(8)MgRE(PO_(4))_(7),effectively impeding CMAS ***,REPO_(4) with smaller RE³−cations displays a slower reaction rate and reduced corrosion kinetics,as evidenced by the smaller thickness of the reaction layer.A larger negative difference in the optical basicity(OB)value between REPO_(4) and CMAS signifies greater corrosion resistance.A mechanistic understanding of CMAS corrosion and elucidation of the effects of critical parameters such as the ionic mass and ionic radius of RE elements on their thermal properties and CMAS corrosion kinetics are useful for the development of novel xenotime-type phosphates as EBCs for SiC-CMCs.

关键词： environmental barrier coatings(EBCs) rare-earth(RE)phosphate coefficients of thermal expansion(CTEs) thermal conductivity calcium-magnesium-alumina-silicate(CMAS)corrosion

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Half-Covered'Glitter-Cake'AM@SE Composite:A Novel Electrode Design for High Energy Density All-Solid-State Batteries

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Nano-Micro Letters 2025年第5期17卷 463-478页

作者： Min Ji Kim Jin-Sung Park Jin Woong Lee Sung Eun Wang Dowoong Yoon Jong Deok Lee Jung Hyun Kim Taeseup Song Ju Li Yun Chan Kang Dae Soo Jung Energy and Environmental Division Korea Institute of Ceramic Engineering and TechnologyJinjuGyeongnam 52851Republic of Korea Department of Materials Science and Engineering Korea UniversityAnam-DongSeongbuk-GuSeoul 136-713Republic of Korea Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 20139USA Department of Materials Science and Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Energy Systems Research Ajou UniversitySuwon 16499Republic of Korea Department of Energy Engineering Hanyang UniversitySeoul 04763Republic of Korea Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

All-solid-state batteries(ASSBs)are pursued due to their potential for better safety and high energy ***,the energy density of the cathode for ASSBs does not seem to be satisfactory due to the low utilization of active materials(AMs)at high *** small amount of solid electrolyte(SE)powder in the cathode,poor electrochemical performance is often observed due to contact loss and non-homogeneous distribution of AMs and SEs,leading to high tortuosity and limitation of lithium and electron transport ***,we propose a novel cathode design that can achieve high volumetric energy density of 1258 Wh L^(-1)at high AM content of 85 wt%by synergizing the merits of AM@SE core–shell composite particles with conformally coated thin SE shell prepared from mechanofusion process and small SE *** core–shell structure with an intimate and thin SE shell guarantees high ionic conduction pathway while unharming the electronic *** addition,small SE particles play the role of a filler that reduces the packing porosity in the cathode composite electrode as well as between the cathode and the SE separator *** systematic demonstration of the optimization process may provide understanding and guidance on the design of electrodes for ASSBs with high electrode density,capacity,and ultimately energy density.

关键词： All-solid-state batteries Cathodes Sulfide-based solid electrolytes Interfaces Mechanofusion

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Texture development and surface reconstruction of BiVO_(4)photoanode via one-pot hydrothermal reaction for enhanced photoelectrochemical water splitting

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Journal of Advanced Ceramics 2025年第3期14卷 133-141页

作者： Sung Won Hwang Yoo Jae Jeong Runfa Tan Indhujasri Saravanan Hyun Soo Han Dong Hoe Kim In Sun Cho Department of Energy Systems Research Ajou UniversitySuwon 16499Republic of Korea Department of Material Science&Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Mechanical Engineering Stanford UniversityStanford 94305USA Department of Material Science&Engineering Korea UniversitySeoul 02841Republic of Korea Materials Science and Engineering Program University of Colorado BoulderBoulder 80303USA

The simultaneous optimization of the bulk and surface characteristics of photoelectrodes is essential to maximize their photoelectrochemical(PEC)*** report a novel one-pot hydrothermal synthesis of textured and surface-reconstructed BiVO_(4)photoanodes(ts-BVO),achieving significant improvements in PEC water *** controlling precursor molarity and ethylene glycol(EG)addition,we developed a stepwise dual reaction(SDR)mechanism,which enables simultaneous bulk texture development and surface *** optimized CoBi/ts-BVO photoanode exhibited a photocurrent density of 4.3 mA∙cm^(−2)at 1.23 V *** hydrogen electrode(RHE)with a high Faradaic efficiency of 98%under one sun *** with nontextured BiVO_(4),the charge transport efficiency increased from 8%to 70%,whereas the surface charge transfer efficiency improved from 9%to 85%.These results underscore the critical role of both bulk and surface engineering in enhancing PEC *** findings offer a streamlined approach for improving the intrinsic properties of photoanodes in solar water splitting.

关键词： BiVO_(4) hydrothermal texture surface reconstruction ethylene glycol(EG) photoelectrochemical water splitting

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Low-cost chemical surface smoothing of CO2 laser-etched acrylic using WELD ON 4 acrylic solvent cement

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International Journal of Advanced Manufacturing Technology 2025年第5期138卷 2245-2255页

作者： Moncada, Luis H. Safaripour, Samira Hutter, Tanya Walker Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States Materials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin AustinTX78712 United States

With the increasing use of micro-manufactured devices and the demand for low-cost fabrication techniques, this study presents a simple and scalable surface polishing method for laser etched acrylic using WELD-ON 4 acrylic solvent cement, a solvent typically used for bonding thermoplastics. The method’s effectiveness was evaluated by treating acrylic samples up to three times and analyzing changes in transparency, surface roughness average (Ra), luminescence, and wettability. Results show that even a single treatment significantly improved surface smoothness, reduced light scattering, and brought contact angle and optical clarity closer to those of unetched acrylic. After three treatments, the surface became isotropic, with laser-etched lines disappearing. Specifically, a 60% reduction in Ra was observed in the direction perpendicular to the etched lines, while the parallel direction initially showed a similar trend, followed by a slight increase attributed to the formation of surface irregularities caused by the re-solidification of dissolved acrylic. Contact angle measurements indicated that the surface remained hydrophilic, with controllable wettability based on the number of treatments. Overall, this method provides a low-cost, cleanroom-free solution for improving the surface finish of laser-fabricated acrylic components. Its compatibility with complex or recessed geometries makes it particularly suitable for microfluidic devices and other precision applications requiring both optical clarity and controlled surface properties. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2025.

关键词： Carbon dioxide lasers

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Temperature-dependent microstructural evolution in a compositionally complex solid electrolyte:The role of a grain boundary transition

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Journal of Advanced Ceramics 2025年第3期14卷 163-176页

作者： Shu-Ting Ko Chaojie Du Huiming Guo Hasti Vahidi Jenna L.Wardini Tom Lee Yi Liu Jingjing Yang Francisco Guzman Timothy J.Rupert William J.Bowman Shen J.Dillon Xiaoqing Pan Jian Luo Aiiso Yufeng Li Family Department of Chemical and Nano Engineering University of California San DiegoLa JollaCalifornia 92093USA Program in Materials Science and Engineering University of California San DiegoLa JollaCalifornia 92093USA Department of Materials Science and Engineering University of California IrvineIrvineCalifornia 92697USA Department of Physics and Astronomy University of California IrvineIrvineCalifornia 92697USA Irvine Materials Research Institute University of California IrvineIrvineCalifornia 92697USA

Compositionally complex solid electrolyte(Li_(0.375)Sr_(0.4375))(Ta_(0.375)Nb_(0.375)Zr_(0.125)Hf_(0.125))O_(3)(LSTNZH)samples are synthesized using different sintering temperatures,durations,and cooling conditions(furnace cooling(FC)*** quenching(AQ)).The temperature-dependent grain growth has been examined to investigate the microstructural evolution and the origin of exaggerated(abnormal)grain *** moderate temperatures,the grain growth of LSTNZH follows a cubic root growth model with an Arrhenius temperature *** increasing temperature,bimodal microstructures develop,and the Arrhenius temperature dependence breaks ***,increasing the temperature induces increased Nb segregation at general grain boundaries(GBs),in contrast to classical GB segregation models but suggesting premelting-like GB disordering,which can explain the observed abnormal grain growth(AGG).In addition,the large grains become faceted with increasing temperature,which occurs concurrently with the temperature-induced transitions in GB segregation and grain growth,thereby further supporting the occurrence of a GB phase-like(complexion)*** impacts on the densification,ionic conductivity,and hardness are also *** work provides a new insight into the fundamental understanding of the grain growth mechanisms of the emergent class of medium-and high-entropy compositionally complex ceramics(CCCs),which is essential for tailoring microstructures and material properties.

关键词： compositionally complex ceramics(CCCs) solid electrolytes perovskite grain growth grain boundary(GB) electron backscatter diffraction(EBSD)

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Triple-function Mn regulation of NiFe(oxy)hydroxide for oxygen evolution reaction

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材料科学技术（英文版） 2025年第4期207卷 1-9页

作者： Hui Wan Meng-Yuan Xie Bo Li Jian-Hang Nie Tao Huang Lei Li Jing-Hui Shi Ming-Hua Xian Jia-Rong Huang Wangyu Hu Gui-Fang Huang Fei Gao Wei-Qing Huang Department of Applied Physics School of Physics and ElectronicsHunan UniversityChangsha 410082China School of Materials and Environmental Engineering Changsha UniversityChangsha 410082China Department of Applied Physics School of Physics and ElectronicsHunan UniversityChangsha 410082China College of Materials Science and Engineering Hunan UniversityChangsha 410082China Department of Nuclear Engineering and Radiological Sciences University of MichiganAnn ArborMI 48109USA

Transition metal(oxy)hydroxides are potential oxygen evolution reaction(OER)electrocatalysts;however,simultaneously modulating multiple factors to enhance their performance is a grand ***,we report an incorporating heteroatom strategy via one-step hydrothermal approach to adjust more than one factor of Mn-doped NiFe(oxy)hydroxide(Mn-NiFeOOH/LDH)*** doping regulates heterojunction morphology(reducing nanoparticles and becoming thinner and denser nanosheets),Ni/Fe ratio and valence states(Ni2+,Ni3+,and Ni3+Δ)of Ni *** former could effectively increase surface active sites,and the latter two reduce the content of Fe in the Mnx-NiFeOOH/LDH heterojunction,en-abling more Ni2+convert to Ni3+/3+Δ that have higher intrinsic OER *** a result,the first-rank Mn-NiFeOOH/LDH with ultra-low overpotential of 185 mV@20 mA cm-2 and 296 mV@500 mA cm-2,and the improved OER performance are outdo to those of commercial RuO2 catalyst for ***,the Mn-NiFeOOH/LDH affords the earliest initial potential(1.392 V ***),corresponds to a recorded low overpotential(162 mV).Based on the density functional theory(DFT),Mn dopants can alter intermedi-ate adsorption energy and effectively decrease·OOH's energy *** research exhibits a feasible strategy to design low cost electrocatalysts and provide new possibilities for future industrialization.

关键词： Electrocatalysts Triple-function Heteroatoms adjusting DFT Oxygen evolution reaction

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Mechanistic switch in corrosion behavior of magnesium alloy diamond lattice structures induced by argon plasma treatment

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Journal of Magnesium and Alloys 2025年第1期13卷 101-119页

作者： Viviana M.Posadaa Alexandru Marin Tonny Naranjo Juan Ramírez Patricia Fernández-Morales Ken and Mary Alice Lindquist Department of Nuclear Engineering Pennsylvania State UniversityPA USA Department of Mechanical Engineering School of MinesUniversidad Nacional de ColombiaBogotáColombia Department of Nuclear Plasma and Radiological EngineeringCollege of EngineeringUniversity of Illinois at Urbana-ChampaignILUSA Medicine Faculty Universidad Pontificia BolivarianaAntioquiaColombia Corporación para Investigaciones Biológicas AntioquiaColombia Industrial Engineering Faculty Universidad Pontificia BolivarianaAntioquiaColombia Materials Science and Engineering Department Pennsylvania State UniversityUniversity ParkPA16802USA Surface Analysis Laboratory Institute for Nuclear Research PitestiMioveni15400Romania Department of Electronics and Computer Science Pontificia Universidad Javeriana de CaliColombia

Advancing 3D magnesium(Mg)development beyond current limitations requires controlling Mg alloy degradation in pre-designed,low-dimension *** study reveals a mechanistic switch in the corrosion behavior of Mg alloy(3.6%Al,0.8%Zn)diamond lattice structures,induced by plasma nanosynthesis(400 eV Ar^(+)ions,fluence 1×10^(17) ions/cm^(2)).Plasma treatment of the Mg alloy increases surface Mg from 1.5%to 14.5%,enhances carbonate formation,and generates a nanostructured surface with a Mg carbonate layer over an oxide/hydroxide *** vitro and in vivo analyses over 8 wk demonstrate how this treatment fundamentally alters the degradation process and stability of these 3D *** untreated samples initially formed a protective film that subsequently diminished,DPNS-treated samples demonstrated an inverse corrosion behavior.X-ray photoelectron spectroscopy(XPS)and electrochemical impedance spectroscopy(EIS)confirmed the presence of a stable,protective layer composed of magnesium oxide,magnesium hydroxide,and magnesium carbonate on the DPNS-treated *** 14 days,the DPNS-treated sample exhibited a more positive corrosion potential(-0.69 V versus-1.36 V)and a marginally lower current density(0.73 mA/cm^(2)compared to 0.75 mA/c^(2))relative to the *** protective layer,combined with modified surface topology,initiated a core-to-periphery degradation pattern that maintained structural integrity for up to 8 wk *** findings support the conclusion that the DPNS-treated scaffold demonstrates sustained improved corrosion resistance over time compared to the untreated ***-CT revealed plasma-treated samples retained larger struts(504.9±95.3μm at 8 wk)and formed larger H_(2) pockets extending 14.2 mm from the implant center,versus 4.9 mm in *** corrosion behavior switch enhances stability but risks pore clogging,offering insights for tailoring Mg alloy degradation and H_(2) evolution in 3D architectures

关键词： Mg Corrosion resistance Cellular materials Nanotopography Nano-medicine Diirected plasma nanosynthesis

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Simultaneous thermal preparation of ultra-pure ZnO nano-wires and recovery of pure MnO from waste alkaline batteries

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Ceramics International 2025年第13期51卷 17593-17606页

作者： Behera, Pravas Ranjan Farzana, Rifat Sahajwalla, Veena School of Materials Science and Engineering UNSW Sydney NSW2052 Australia Advanced Materials Technology Department Council of Scientific and Industrial Research – Institute of Minerals and Materials Technology Odisha Bhubaneswar751013 India Australian Nuclear Science and Technology Organisation Locked Bag 2001 Kirrawee DC NSW2232 Australia

A simultaneous preparation of 100 % pure zinc oxide nano-wires and recovery of pure manganese oxide catalysts from waste alkaline batteries was studied by a laboratory scale thermal processing technique with temperature variation (850–950 °C) at various residence times (1–3 h) under a constant Ar atmosphere and 1 atm pressure. The change in structure and morphology of the products obtained at different experimental parameters were analysed through SEM and TEM analysis. The zinc oxide nano-wires obtained at 950 °C, 1 h showed consistency in structure and morphology and also purity as confirmed by XRD, XPS, and EDS results. The obtained zinc oxide nano-wires at 850–950 °C showed a variance in the average diameter from ∼82 to ∼127 nm as observed under TEM with an observed morphological change with increase in temperature/time. Photoluminescence spectra was obtained for ZnO nano-wires which showed two emission bands in UV range and visible range respectively. This thermal investigation process exhibits a roadway to recycle waste alkaline batteries by recovering MnO and ZnO while reducing the burden on landfills and environment alike. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Wire products

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Slow light ion irradiation of polymers II: etching of microbeam-irradiated Makrofol

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Radiation Effects and Defects in Solids 2025年第1-2期180卷 103-124页

作者： Vacik, J. Fink, D. Ceccio, G. Havranek, V. Tuharin, K. Kiv, A. Nuclear Physics Institute of Czech Academy of Science Rez Czech Republic Department of Materials Engineering Ben-Gurion University of the Negev Beer-Sheva Israel

Thin polymer foils were irradiated by low energy light ions at various fluences and thereafter etched until electric currents could penetrate the foils. Both the etchant breakthrough times, and the times when the maximum recordable current signal is reached by the measuring equipment, are recorded as characteristic parameters to describe the etchant process in detail. At low to medium fluences, their correlations with the applied ion fluence reveal details of both underlying polymeric properties and radiative mechanisms, such as differences in the behavior of amorphous and crystalline regions and of the existence of crazes and cracks, as well as radiation-induced compaction of radiation damage via chain scission. At excessive fluences, polymers start favoring crack formation as a consequence of proceeding carbonization. There is both a gradual, smooth opening of conductive channels emerging across the foils, and a sudden, full current onset, indicating that a different mechanism is at work. The use of microbeams has the advantage not only of measuring (as usual) the overall average values of the relevant parameters of complex materials such as polymers but also allowing one to select specific very small areas from many possibilities to examine their peculiarities. However, this eventually results in completely different findings depending on the region examined. Based on a general understanding of the material’s composition and behavior, the main task is now to find out which obtained result describes which individual composition, and how it all can find its place in a general overview. This is what we did here. There is huge variability in the intrinsic parameters during the etching of polymers irradiated with low energy light ions, such that the characteristic etching times reveal much larger scattering in the data compared to, e.g. the simple case of etched track formation by swift heavy ions. However, using a few proposed strategies, it is possible to derive val

关键词： Wet etching

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