Article
Chemistry, Physical
Annica Wetzel, Marcus von der Au, Paul M. Dietrich, Joerg Radnik, Ozlem Ozcan, Julia Witt
Summary: This study investigated the corrosion characteristics of CrCoNi and CrMnFeCoNi alloys in different solutions, and found that CrCoNi exhibited better corrosion resistance.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Guangyuan Tian, Junsheng Wang, Chengpeng Xue, Shuo Wang, Xinghai Yang, Hui Su, Quan Li, Xingxing Li, Chengming Yan, Zhihao Yang
Summary: In this study, it was found that microalloying Sn can improve the corrosion resistance of Mg-Li alloys by forming Mg2Sn and reducing electro-potential difference. The addition of Sn not only reduced the corrosion rate to the minimum value but also promoted the formation of dense corrosion oxide films. The corrosion mechanism involved the breakthrough of the protective layer, hydrogen evolution reaction, and segregation of secondary phases and corrosion products.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Jinshu Xie, Jinghuai Zhang, Zhi Zhang, Qiang Yang, Kai Guan, Yuying He, Ru Wang, Hao Zhang, Xin Qiu, Ruizhi Wu
Summary: Formation of solute-enriched stacking faults (SESFs) and their transformation into long period stacking ordered (LPSO) phase in Mg alloys have been achieved in this study. The role and advantages of SESFs and LPSO phase were confirmed by experimental observations. These findings are significant for the development of high-strength and anti-corrosion Mg alloys.
Article
Chemistry, Multidisciplinary
G. H. A. Abrenica, M. Lebedev, M. Fingerle, S. Arnauts, W. Calvet, T. Mayer, S. de Gendt, D. H. van Dorp
Summary: This study investigated the anisotropy in the wet-chemical surface oxidation of indium arsenide (InAs) (111) in HCl/H2O2 and H2SO4/H2O2. The atomic-scale etching kinetics and the surface chemistry were determined, and the transformation of electronic properties was probed by post operando synchrotron X-ray photoelectron spectroscopy. The results showed that the oxidation rate was higher for the (111)-B surface (As-terminated) than for the (111)-A surface (In-terminated). The InAs etch rates were lower in HCl/H2O2 solution compared to H2SO4/H2O2. The nature of the etchant played a role in the band bending, which was attributed to the formation of different species (sulfates/sulfides, chlorides, and hydroxides) on the surface.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Electrochemistry
S. Choudhary, S. O'Brien, Y. Qiu, S. Thomas, R. K. Gupta, N. Birbilis
Summary: Exploration of multi-principal-element alloys has led to the discovery of exceptional corrosion resistance in a low-cost and lightweight alloy, due to a unique Si-based passivation mechanism. This reveals the potential for developing corrosion-resistant alloys from waste metals.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Construction & Building Technology
Xu Chen, Chengcan Xiao, Xintong Wang, Jiang Yang, Chuan He
Summary: This study investigated the corrosion behaviors of 2205 duplex stainless steel in 3.5% biotic and abiotic NaCl solutions. The results showed that the development of sulfate-reducing bacteria (SRB) biofilms on the steel surface was a slow and dynamic process, with preference for attachment to the ferrite phase. The presence of biofilms resulted in narrower and deeper pitting corrosion, as well as increased corrosion current density.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Biochemical Research Methods
Veronique Vacchina, Dominique Foix, Mathieu Menta, Herve Martinez, Fabienne Seby
Summary: An analytical method was developed to confirm the presence of elemental selenium (Se(0)) in selenized yeasts using HPLC-ICP-MS and single-particle ICP-MS. The study found Se(0) to represent 10-15% of total Se in the yeasts. While both methods were able to detect Se(0), reliable quantitative results were not obtained.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Environmental Sciences
Mehmet Emin Seker, Aysegul Erdogan, Seda Dicle Korkmaz, Ozlem Kuplulu
Summary: This study collected pollen samples from 25 different locations in Northern Turkey to investigate pollution monitoring. The surface chemistry of the samples was characterized using X-ray photoelectron spectroscopy (XPS), and the concentrations of certain elements were determined using inductively coupled plasma mass spectrometry (ICP-MS). The study found a correlation between pollen samples with high heavy metal concentrations and traffic density in the northern region. Pollens can be used as potential bio-indicators for monitoring heavy metal pollution.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
J. Jayaraj, Robin Elo, Kumar Babu Surreddi, Mikael Olsson
Summary: This study systematically investigated the microstructure, binder composition, and corrosion behavior of WC-20 vol.% Ni and WC-20 vol.% Co cemented carbides. The results showed that both grades have similar WC grain sizes, and the binder phase of each grade is an alloy of Ni-W and Co-W. WC-Ni(W) exhibited high corrosion resistance due to the formation of an extremely thin WO3 passive film.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Physical
Anis Madaci, Hana Ferkous, Amel Sedik, Amel Delimi, Cherifa Boulechfar, Amina Belakhdar, Malika Berredjem, Mohamed Aymen Chaouch, Manawwer Alam, Hatem Majdoub, Nicole Jaffrezic-Renault, Yacine Benguerba
Summary: Corrosion causes significant damage and financial losses annually. Scientists are exploring the use of inhibitors derived from renewable resources and natural ingredients to minimize environmental impact. The inhibition effects of PPUN derived from prickly pear nopales have been studied using electrochemical methods, revealing its ability to slow down corrosion processes by adsorbing on the metal surface and inhibiting active corrosion sites.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Multidisciplinary
Meicheng Li, Antoine Seyeux, Frederic Wiame, Philippe Marcus, Jolanta Swiatowska
Summary: This study utilized ToF-SIMS 3D imaging to investigate localized corrosion of Al-Cu-Li alloy, revealing the presence of an oxide/hydroxide layer enriched with chlorides and Cu hydroxides on the Al-Cu-Fe-Mn intermetallic particles (IMPs) and between IMPs and matrix substrate. Li was found over the alloy matrix but not over the IMPs in regions where localized corrosion occurred.
NPJ MATERIALS DEGRADATION
(2021)
Article
Chemistry, Analytical
B. Wagner, A. Czajka
Summary: The elemental composition of historic iron gall-inks can be approximated using LA-ICP-MS measurements and colorimetric response with BPhen. This non-invasive analytical approach allows for conservation diagnosis and ink corrosiveness estimation, as well as fingerprinting of valuable manuscripts. The presence of Fe and other elements significant for ink corrosion can be detected in a neutral way for historical documents using this method.
Article
Energy & Fuels
M. Sivasakthi, P. Priyadharsini
Summary: This paper discusses the ability of fly ash and fly ash geopolymer for removing lead ions from aqueous solution. Various physiochemical properties and characterization techniques were used to investigate the adsorption capacity of the materials. The results showed that fly ash geopolymer had a higher adsorption capacity and potential for safe lead disposal.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Polymer Science
Amir Fayyaz, Haroon Asghar, Muhammad Waqas, Asif Kamal, Wedad A. Al-Onazi, Amal M. Al-Mohaimeed
Summary: The potential of using laser-induced breakdown spectroscopy (LIBS) in combination with various other spectroscopic and statistical methods was assessed for characterizing pure and MgO-doped nylon (6/6) organic polymer samples. Various techniques including XRD, FTIR, DRS, XPS, and EDX were employed to assess the structural crystallinity and chemical composition of the polymer samples. The results were validated against the standard ICP-MS technique, and PCA was applied for classification analysis, demonstrating the effectiveness of the LIBS technique for polymer characterization.
Article
Materials Science, Multidisciplinary
Dominik Dworschak, Hsiu-Wei Cheng, Ching-Shun Ku, Ching-Yu Chiang, Chia-Hsien Lin, Markus Valtiner
Summary: This study compared elemental dissolution currents of various nickel base alloys under corrosive conditions, revealing that molybdenum can only form stable precipitate layers under openly corroding conditions. By tracking the interaction between crevice environment and electrolyte with a new sample design, insight into crevice solution chemistry and solubility of passive film-forming elements was provided. Further examination of local elemental depletion was conducted using XPS and nanometer resolved XRF.
Review
Materials Science, Multidisciplinary
Dierk Raabe, Dirk Ponge, Peter J. Uggowitzer, Moritz Roscher, Mario Paolantonio, Chuanlai Liu, Helmut Antrekowitsch, Ernst Kozeschnik, David Seidmann, Baptiste Gault, Frederic De Geuser, Alexis Deschamps, Christopher Hutchinson, Chunhui Liu, Zhiming Li, Philip Prangnell, Joseph Robson, Pratheek Shanthraj, Samad Vakili, Chad Sinclair, Laure Bourgeois, Stefan Pogatscher
Summary: Aluminum has both positive and negative impacts on sustainability. Recycling aluminum can improve sustainability, while extracting it from ores is energy-intensive. The amount of recyclable aluminum is expected to double by 2050, offering an opportunity for a circular economy. However, the presence of elemental contamination in post-consumer scrap poses challenges for alloy design.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Bernhard Trink, Irmgard Weifssensteiner, Peter J. Uggowitzer, Katharina Strobel, Stefan Pogatscher
Summary: This study investigates the effect of a high volume fraction of Fe-rich intermetallic phases on microstructure evolution and mechanical properties in a cold rolled Al-Mg-Si wrought alloy. The results show that the alloy with almost 10 vol-% Fe-rich intermetallic phase exhibits an unusually attractive combination of strength and ductility, in addition to a substantially increased strain hardening typical of hetero-structured materials, and can facilitate a higher usage of scrap input.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Phillip Dumitraschkewitz, Matheus A. Tunes, Cameron R. Quick, Diego Santa Rosa Coradini, Thomas M. Kremmer, Parthiban Ramasamy, Peter J. Uggowitzer, Stefan Pogatscher
Summary: The solidification behavior of a eutectic AlCu specimen is investigated using in situ scanning transmission electron microscope experiments. By varying the cooling conditions, different rapid solidification morphologies are obtained. Additionally, the spheroidization of lamellas during annealing at elevated temperatures is studied.
Article
Nanoscience & Nanotechnology
Nikolaus P. Papenberg, Aurel Arnoldt, Bernhard Trink, Peter J. Uggowitzer, Stefan Pogatscher
Summary: This study investigates the forging process of a heat-treatable magnesium alloy AXMZ1000 for a piston rod. The microstructural evolution and mechanical properties of two different stock materials, cast and extruded, are compared and analyzed. The results show that comparable microstructures are obtained with both starting materials, and the mechanical properties achieved with extruded feedstock are slightly better.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Multidisciplinary Sciences
Nikolaus Papenberg, Thomas Hatzenbichler, Florian Grabner, Peter J. Uggowitzer, Stefan Pogatscher
Summary: Weight reduction is significant in transportation industries as it affects fuel consumption and vehicle range. Different materials are commonly used to take advantage of specific properties, with aluminum alloys used in both cast and wrought states. However, magnesium alloys, which are lighter, are only used in castings. Despite progress in scientific research on magnesium wrought alloys, their industrial implementation is limited, resulting in a lack of safety and structural applications. To promote industrial application and acceptance of these materials, the forging process of an automotive control arm was investigated. By using an age-hardenable Mg-Al-Ca-Zn-Mn lean alloy, which can be processed similarly to AL alloys, the study provides information on forming characteristics and challenges.
SN APPLIED SCIENCES
(2023)
Article
Engineering, Environmental
Roberto Cestaro, Laetitia Philippe, Albert Serra, Elvira Gomez, Patrik Schmutz
Summary: In this study, electrodeposited manganese oxides (MnyOx) films were used as a visible-light-driven photocatalyst for the removal and mineralization of Tetracycline (TC) antibiotics. The best performing manganese oxide showed 92.4% TC mineralization efficiency after 180 min of LED visible illumination. Hydroxyl radicals (center dot OH) were found to be the main active species responsible for the TC degradation. The degradation of the oxide surface structure was identified as the key factor limiting the photocatalytic activity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
M. G. Strebl, M. P. Bruns, S. Virtanen
Summary: A highly sensitive respirometric method is developed for real-time monitoring of reaction rates involving H-2 and O-2 during electrochemical polarization. The method allows quantification of rates resulting from reactions such as HER, ORR, and OER based on simultaneous monitoring of total pressure and O-2 partial pressure changes. It enables deconvolution of net electric current into cathodic and anodic partial reaction rates and determination of the true metal oxidation rate. The respirometric monitoring approach also distinguishes the rate of O-2 evolution from electrode oxidation processes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Milad Roostaei, Peter J. Uggowitzer, Reinhard Pippan, Oliver Renk
Summary: The attractive properties of Mg-bcc nanocomposites have gained increasing interest, but bulk fabrication has been unsuccessful due to strain localization within the Mg-phase. Through high-pressure torsion, the deformation behavior and resulting microstructures of Mg-Fe composites were analyzed at different applied strains and processing temperatures. Surprisingly, processing at 73% of Mg's melting point accelerated microstructural refinement and improved homogeneity, leading to a three-fold increase in hardness compared to ambient processing. This suggests that further optimization could potentially create Mg-based materials with strength beyond a gigapascal.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Sebastian Samberger, Irmgard Weissensteiner, Lukas Stemper, Christina Kainz, Peter J. Uggowitzer, Stefan Pogatscher
Summary: This study presents age-hardenable, fine-grained AlMgZnCu crossover alloys intended for superplastic and quick plastic forming processes. These alloys utilize T-phase (Mg32(Al,Zn)49) to refine the grain structure and increase age-hardening. The study demonstrates the importance of particle stimulated nucleation (PSN) using T-phase particles, which leads to a fine grain size as low as 4 μm. The resulting alloys have excellent high-temperature forming properties and high stability.
Article
Materials Science, Multidisciplinary
Bernhard Trink, Irmgard Weissensteiner, Peter J. Uggowitzer, Katharina Strobel, Anna Hofer-Roblyek, Stefan Pogatscher
Summary: This study introduces new alloys that combine the age-hardening capability of Al-Mg-Si alloys with the microstructure-controlling effect on processing of primary Fe-rich intermetallic phases used in foil stock. Processing and microstructure-property relations in new crossover aluminum alloys derived from 6xxx and 8xxx foil stock alloys are shown. The study demonstrates the attractive combinations of strength and ductility achieved in these new alloys.
Article
Materials Science, Multidisciplinary
Kai Chen, Adrianna Mackiewicz, Hans -Peter Seifert, Sannakaisa Virtanen, Stefan Ritter
Summary: The stress corrosion cracking (SCC) behavior of nickel-based weld metal Alloy 182 was investigated in simulated light water reactor environments with or without zinc (Zn) addition. It was found that Zn injection is able to effectively mitigate SCC, even at the lowest tested concentration of 15 ppb. This beneficial effect may be attributed to the modified surface oxide film by Zn incorporation.
Review
Biotechnology & Applied Microbiology
Yuyun Yang, Yuejun Liu, Laiming Song, Xiufang Cui, Juncen Zhou, Guo Jin, Aldo R. Boccaccini, Sannakaisa Virtanen
Summary: Iron-oxide-based biomagnetic nanocomposites have significant potential for biomedical applications such as MRI and cancer treatment. By modifying their properties and structure, their performance can be optimized. However, rigorous evaluation of their biosafety is needed before clinical translation.
TRENDS IN BIOTECHNOLOGY
(2023)
Article
Biochemical Research Methods
Diego S. R. Coradini, Matheus A. Tunes, Patrick Willenshofer, Sebastian Samberger, Thomas Kremmer, Phillip Dumitraschkewitz, Peter J. Uggowitzer, Stefan Pogatscher
Summary: The present study demonstrates a methodology for in situ investigation of nanoalloying using metallic nanomaterials as reactants within a transmission electron microscope. The method can be used as a starting point for studying nanometallurgy and subsequent alloying of materials. The results showed that both Au and Cu nanomaterials could alloy with Al when melted in the transmission electron microscope. Overall, these results suggest that transmission electron microscope-based in situ melting and alloying is a valuable technique for studying the metallurgical processing of nanomaterials.
Article
Electrochemistry
Kai Chen, Adrianna Mackiewicz, Sannakaisa Virtanen, Pascal V. Grundler, Hans-Peter Seifert, Stefan Ritter
Summary: The effect of zinc injection on the stress corrosion cracking (SCC) initiation of Alloy 182 weld metal and 20% cold-worked type 316L stainless steel under simulated light water reactor conditions was studied. The results showed that Alloy 182 had higher SCC initiation susceptibility than the 316L stainless steel without zinc injection. However, when zinc was injected, there was a tendency towards higher stress thresholds or lower crack densities for SCC initiation in both materials, indicating a mitigation effect of zinc water chemistry on SCC initiation. The improved SCC performance is believed to be due to the optimized, zinc-treated oxide film.
Article
Materials Science, Multidisciplinary
Philip Aster, Phillip Dumitraschkewitz, Peter J. Uggowitzer, Florian Schmid, Georg Falkinger, Katharina Strobel, Peter Kutlesa, Michael Tkadletz, Stefan Pogatscher
Summary: This study investigated the formation of solute clusters and their contribution to strain hardening in aluminum alloys by using APT and tensile testing. The results showed that clusters could form during plastic deformation, which was referred to as strain-induced clustering.
