Article
Materials Science, Multidisciplinary
Muthuchamy AyyappaRaj, Digvijay Yadav, Dinesh K. Agrawal, Raja Annamalai Arunjunai Rajan
Summary: By adding La(2)O(3) to WHA with a ternary composition of W-7Ni-3Fe, this study achieved control over sintered density, grain size, hardness, and UTS, providing important references for the preparation of the alloy.
Article
Engineering, Chemical
P. S. Ninawe, S. Ganesh, P. Sai Karthik, S. B. Chandrasekhar, R. Vijay
Summary: Austenitic oxide dispersion strengthened (AODS) steel was fabricated using two-stage ball milling and consolidation through spark plasma sintering (SPS). The effect of SPS temperature on density, microstructure, and mechanical properties of the consolidated samples was investigated, demonstrating the best combination of strength and elongation achieved on AODS alloys processed using MA and SPS.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Vadde Madhur, Muthe Srikanth, A. Raja Annamalai, A. Muthuchamy, Dinesh K. Agrawal, Chun-Ping Jen
Summary: In this study, W-Cu composites were fabricated by adding various amounts of nano-copper to tungsten, showing improvements in densification, strength, hardness, and electrical conductivity with increasing copper content. Fractography analysis of tensile tested samples revealed a mixed-mode of fracture, and an increase in nano-copper content resulted in higher electrical conductivity.
Article
Materials Science, Ceramics
V. L. Arantes, J. Sakihama, J. Vleugels
Summary: In this study, a Functionally Graded Material (FGM) with high hardness up to 25.1 GPa and good fracture toughness was successfully produced by using step graded Al2O3/NbC composites consolidated by Spark Plasma Sintering (SPS). The designed compositional gradient was maintained after sintering, resulting in fully dense crack-free graded bodies.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Mehdi Shahedi Asl, Zohre Ahmadi, Farhad Sadegh Moghanlou, Mohammad Vajdi, Mohammadreza Shokouhimehr
Summary: This investigation examines the microstructure and mechanical properties of TiB2-SiC-graphene ceramics. The results show that the system is unreactive, preventing the in-situ nucleation of B4C and TiC phases. While the presence of TiO2 and B2O3 impurities is reduced with the addition of graphene nano-platelets (GNPs), SiO2 is confirmed to be present in the final microstructure. The TiB2 phase exhibits significantly higher hardness and Young modulus compared to the SiC phase.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
H. Tripathy, C. Sudha, V. Thomas Paul, R. Thirumurugesan, T. N. Prasanthi, R. Sundar, N. Vijayashanthi, P. Parameswaran, S. Raju
Summary: The study successfully synthesized high-density tungsten carbide pellets using spark plasma sintering technique and characterized their thermal properties. By measuring and analyzing the experimental data, a comprehensive database on vibrational thermodynamic properties from 0 to 1273 K was obtained. The values of thermal expansion, thermal conductivity, and dynamic Young's modulus of tungsten carbide varied with temperature.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Nojun Kwak, Guensik Min, Yeonju Oh, Dong-Woo Suh, Hyoung Chan Kim, Sung-gyu Kang, Heung Nam Han
Summary: The study introduces protective foils made up of molybdenum and tantalum to minimize carbide formation in tungsten. Tantalum foil suppresses carbon diffusion into tungsten, while molybdenum foil is not an effective diffusion barrier.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Seyed Ali Delbari, Abbas Sabahi Namini, Maziyar Azadbeh, Zohre Ahmadi, Van-Huy Nguyen, Quyet Van Le, Mohammadreza Shokouhimehr, Mehdi Shahedi Asl, Mohsen Mohammadi
Summary: This study fabricated Ti-10 wt% Mo-1 wt% B4C composites using the SPS technique and investigated the effects of sintering temperature and dwell time on their microstructure and mechanical properties. A high relative density of 99.92% was achieved for the composites sintered at 1450 degrees C and further hot-rolled at 900 degrees C. X-ray analysis illustrated the formation of in-situ phases during the SPS process, while microstructural investigation confirmed the influence of sintering temperature and holding time on reducing porosity. Additionally, the post hot rolling at 900 degrees C was shown to modify the microstructure and activate the strengthening mechanism in the prepared composites.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Adrian Grabos, Pawel Rutkowski, Jan Huebner, Dawid Kozien, Shenghua Zhang, Yen-Ling Kuo, Dariusz Kata, Shigenari Hayashi
Summary: The study investigated the applicability of previously obtained Inconel 625-NbC metal matrix composites (MMC) in high-temperature and/or oxidative environments. The samples were manufactured using spark plasma sintering (SPS) and subjected to oxidation tests. The results showed that all samples were able to form passive layers, but these layers were locally breached due to grain growth and thermal stresses. Two different passive layer formations were observed.
Article
Materials Science, Ceramics
Gokhan Acikbas, Nurcan Calis Acikbas, Bilge Yaman Islak, Erhan Ayas, Kubra Gurcan Bayrak, Alican Ataman
Summary: In this study, Cu particles were incorporated into the SiAlON matrix to investigate their effect on the fracture toughness, hardness, density, friction, and wear of the composites. The results showed that the fracture toughness improved with the addition of 30 vol% copper, while the hardness decreased. It was also found that some copper silicide phase formed during the sintering process. The wear rates were significantly reduced in the SiAlON matrix with 30 wt% copper content.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Rubia Hassan, Kantesh Balani
Summary: The sintering mechanisms of ZrB2 and SiC-reinforced ZrB2 ceramic composites were investigated by determining the activation energy of densification in different temperature ranges. The results showed that the addition of SiC changed the prominent densification mechanism and impacted the mechanical performance with systemic increase of sintering temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Engineering, Chemical
Abbas Sabahi Namini, Seyed Ali Delbari, Mehdi Shahedi Asl, Quyet Van Le, Mohammadreza Shokouhimehr
Summary: This study evaluated the influence of SiC addition on the microstructure development, mechanical characteristics, and densification behavior of (Zr,Ti)B-2-ZrC materials. The addition of SiC improved the relative density values and mechanical properties, leading to the formation of a solid-solution of (Zr,Ti)B-2.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Materials Science, Ceramics
W. A. Shah, X. Luo, Y. Q. Yang
Summary: Monolithic Al2O3 and Al2O3-graphene-SiC hybrid composites were prepared by spark plasma sintering (SPS) under vacuum atmosphere. The hybrid composites exhibited high density and the microstructure was significantly influenced by the SiC content. The addition of SiC changed the fracture mode from inter-granular fracture to a mixed mode. The Al2O3-0.4 wt%graphene-5 wt% SiC hybrid composite showed the highest bending strength and hardness, surpassing the monolithic alumina. The thermal properties of the composites were studied and correlated with the microstructure.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Mingcheng Zhu, Lan Zhang, Na Li, Desen Cheng, Jidong Zhang, Shiyao Yu, Hui Bai, Huizhong Ma
Summary: In this study, ternary ZrB2-SiC-MoSi2 composites with different compositions were successfully fabricated by reactive spark plasma sintering. The densification behavior, microstructures, and mechanical properties were investigated. It was found that the addition of MoSi2 could improve the relative density, hardness, and fracture toughness of the composites, and a core-shell structure could be formed to enhance the overall performance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Mary A. Awotunde, Peter A. Olubambi, Daolun Chen
Summary: In this study, carbon nanotube (CNT)-reinforced NiAl intermetallic composites were produced via powder metallurgy. The compressive behavior of the sintered NiAl-CNT composites at room temperature was evaluated, with a focus on the toughening mechanisms of the CNT reinforcement and the resulting microstructures. The results showed that the NiAl-0.5 wt% CNT composites exhibited a balanced combination of strength and toughness due to the presence of both coarse and fine bimodal grains in its microstructure.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Eleni Mitoudi Vagourdi, Weiguo Zhang, Ksenia Denisova, Peter Lemmens, P. Shiv Halasyamani, Mats Johnsson
Article
Chemistry, Multidisciplinary
Bejan Hamawandi, Sedat Ballikaya, Mikael Rasander, Joseph Halim, Lorenzo Vinciguerra, Johanna Rosen, Mats Johnsson, Muhammet S. Toprak
Article
Chemistry, Inorganic & Nuclear
Sk Imran Ali, Reinhard K. Kremer, Henrik Skogby, Mats Johnsson
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2020)
Article
Nanoscience & Nanotechnology
Ying Zhao, Fei Ye, Torkel B. Brismar, Xuan Li, Rui He, Rainer Heuchel, Ramy El-Sayed, Neus Feliu, Wenyi Zheng, Sandra Oerther, Joydeep Dutta, Wolfgang J. Parak, Mamoun Muhammed, Moustapha Hassan
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Materials Science, Ceramics
Xuguang Li, Shuangming Li, Dou Li, Bin Yang, Changjiang Xu, Hong Zhong
Summary: A new strategy of combining temperature gradient zone melting process with hot pressing was successfully employed to synthesize YbFe-doped CoSb3, leading to enhanced thermoelectric properties and reduced grain size. This work provides an alternative way to fabricate skutterudite materials and improve their development.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Xiaowen Yu, Jun Zhao, Mats Johnsson
Summary: The study introduces a hybrid catalyst composed of iron-doped cobalt phosphide nanowire arrays and Ni(OH)(2) nanosheets, which exhibit strong electronic interactions at the interface, significantly enhancing interfacial reactivity. Experimental and theoretical studies confirm that the hybrid catalyst promotes the sluggish rate-limiting steps in both the HER and OER processes.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Applied
Mohamed Ahmed Mohamady Hussein, Ece Guler, Erkan Rayaman, Muhammet Emin Cam, Ali Sahin, Mariusz Grinholc, Demet Sezgin Mansuroglu, Yesim Muge Sahin, Oguzhan Gunduz, Mamoun Muhammed, Ibrahim M. El-Sherbiny, Mosaad Megahed
Summary: Dual-drug delivery systems were constructed using coaxial techniques, showing controlled drug release and improved performance of nanofibrous membranes, which have promising applications in tissue regeneration and wound healing.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Bejan Hamawandi, Hazal Batili, Moon Paul, Sedat Ballikaya, Nuzhet I. Kilic, Rafal Szukiewicz, Maciej Kuchowicz, Mats Johnsson, Muhammet S. Toprak
Summary: This study presents rapid and effective methods for synthesizing nanostructured bismuth telluride materials with promising TE performance using microwave volume heating in a short reaction time. The use of water as a solvent is as effective as ethylene glycol, providing a greener reaction medium. Characterization techniques, including XRD, SEM/TEM, XPS and zeta potential, were used to evaluate crystal structure, morphology, crystallinity, microstructure and surface chemistry of the materials. The low thermal conductivity values and high ZT values demonstrate the potential impact of these materials, developed with energy and time efficiency, in advancing TE technology with minimal environmental impact.
Article
Chemistry, Multidisciplinary
Sawsan El Jamal, Mats Johnsson, Mats Jonsson
Summary: This study investigates the dissolution of uranium in aqueous solutions containing HCO3- and H2O2. The experiments show that UC dissolves readily in a solution with 10mM HCO3- and the presence of H2O2 further enhances its dissolution. UC also dissolves in pure water with H2O2, although at a slower rate compared to solutions containing both HCO3- and H2O2.
Article
Electrochemistry
Egon Campos dos Santos, Rafael B. Araujo, Mikael Valter, German Salazar-Alvarez, Mats Johnsson, Michal Bajdich, Frank Abild-Pedersen, Lars Gunnar Moody Pettersson
Summary: In this study, a computational screening protocol was used to identify a series of efficient catalysts for glycerol electrooxidation and sustainable energy production.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Xiaowen Yu, Egon Campos dos Santos, Jai White, German Salazar-Alvarez, Lars G. M. Pettersson, Ann Cornell, Mats Johnsson
Summary: A high-performance MoOx/Pt composite electrocatalyst for glycerol electrolysis in alkaline electrolytes is reported, showing excellent performance in both glycerol oxidation reaction (GOR) and hydrogen evolution reaction (HER). The MoOx nanosheets play an important role in the adsorption of glycerol molecules in GOR, the dissociation of water molecules in HER, and the strong electronic interaction with Pt.
Article
Polymer Science
Mohamed Ahmed Mohamady Hussein, Sena Su, Songul Ulag, Agata Wozniak, Mariusz Grinholc, Goekce Erdemir, Serap Erdem Kuruca, Oguzhan Gunduz, Mamoun Muhammed, Ibrahim M. El-Sherbiny, Mosaad Megahed
Summary: Studies have shown that the incorporation of cerium oxide nanoparticles in nanofibers can effectively promote diabetic wound healing by providing sustained release of the nanoparticles and mimicking the extracellular matrix functionality. The nanofibers with cerium oxide nanoparticles exhibited a two-stage release behavior, first with an initial burst release followed by sustained release, leading to enhanced adhesion, growth, and proliferation of fibroblasts. Additionally, higher amounts of cerium oxide nanoparticles in the trilayer nanofibers demonstrated improved morphological, mechanical, thermal, and cytobiocompatibility properties compared to lower doses, suggesting a specific approach for treating diabetic wounds.
Article
Chemistry, Physical
Xiaowen Yu, Rafael B. Araujo, Zhen Qiu, Egon Campos dos Santos, Athira Anil, Ann Cornell, Lars G. M. Pettersson, Mats Johnsson
Summary: This study demonstrates the effectiveness of CoMoO4 catalyst for glycerol oxidation reaction, with high selectivity and efficiency, enabling the production of value-added products and high-purity hydrogen.
ADVANCED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Junnan Chen, Feng Xie, Wei Wang, Yan Fu, Jian Wang
Summary: This paper investigates the leaching behaviors of gold and silver from a complex sulfide concentrate in copper-tartrate-thiosulfate solutions. It is found that increasing the temperature and concentrations of copper, tartrate, and thiosulfate can promote gold leaching, and a suitable pulp pH is critical for gold and silver leaching. The recycling of leaching solutions is also important.
Article
Nanoscience & Nanotechnology
Irina Terekhina, Jai White, Ann Cornell, Mats Johnsson
Summary: Pd octahedral, rhombicdodecahedral, and cubic nanoparticles were synthesized and studied as catalysts for glycerol electrooxidation reaction (GEOR) in a strongly alkaline medium. Different types of catalysts exhibited varying levels of mass activity and specific activity. Glycerate was the dominant product with high selectivity, and a proposed reaction mechanism was based on the product distribution.
ACS APPLIED NANO MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Liuming Wei, Jingwen Li, Yonggang Li, Qirong Zheng, Fan Cheng, Chuanguo Zhang, Jingyu Li, Gaofeng Zhao, Zhi Zeng
Summary: This study investigates the influence of He-V complexes on H behaviors on different W surfaces using DFT calculations. The results show that H dissolution is most difficult but H trapping is easiest on the W (110) surface, while the opposite is true on the W (111) surface. Moreover, the presence of He-V complexes increases the difficulty of H diffusion from bulk to surface and desorption.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yan Meng, Song Zeng, Chen Chen, Chaowen Zhu, Huahai Shen, Xiaosong Zhou, Xiaochun Han
Summary: The characteristics of magnetron sputtered Cr coatings vary with different temperature, bias voltage, and pressure. Coatings with random orientation, good crystallinity, and small grain size exhibit favorable oxidation behavior, while coatings with strong (200) texture, poor crystallinity, and large grains have many intrinsic defects that are detrimental to the protection property of the Cr coatings.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xinyuan Xu, Zefeng Yu, Wei-Ying Chen, Aiping Chen, Arthur Motta, Xing Wang
Summary: This study presents an automated approach for characterizing grain morphology in TEM images recorded during ion irradiation. By combining a machine learning model and a computer vision algorithm, comparable results to human analysis can be achieved with significantly reduced analysis time. Researchers can train their own models following the procedures described in this study to automate grain morphology analysis of their own TEM images.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Shihao Wu, Dong Wang, Yapei Zhang, Koji Okamoto, Marco Pellegrini, Wenxi Tian, Suizheng Qiu, G. H. Su
Summary: The oxidation and degradation mechanisms of Cr coating on Zr alloy cladding under high temperature steam atmosphere are summarized, and a mathematical analysis model is established to predict the changes in coating thickness. The model is applied in the analysis of structure evolution under different conditions.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
V. Diaz-Mena, J. de Prado, M. Roldan, I. Izaguirre, M. Sanchez, M. Rieth, A. Urena
Summary: The brazeability of a cupronickel alloy was evaluated as a filler alloy for high-temperature joining of tungsten to steel. The study investigated the brazing conditions and the impact of the selected filler on the joint quality using numerical software. The results showed different metallurgical interactions and diffusion phenomena between the filler alloy and the base materials at different temperatures. The study emphasized the importance of selecting a suitable filler to mitigate residual stresses in the joints.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Pengcheng Zhu, Yajie Zhao, Yan-Ru Lin, Jean Henry, Steven J. Zinkle
Summary: This study investigates the effect of heavy-ion irradiation on radiation hardening in high-purity binary alloy Fe18Cr. Nanoindentation testing and high-quality TEM imaging were conducted to extract hardness and microstructure information. The strength factor was accurately calculated based on the detailed TEM characterization of irradiated microstructures, and a refined hardening superposition method was applied to quantify the mechanical properties of ion-irradiated materials.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Bin Wu, Haixia Ning, Hanzhen Zhu, Jianjun Chen, Kang Wang, Daiyu Zhang, Fu Wang, Qilong Liao
Summary: This study discusses the effects of ZrO2 and B2O3 on the phase composition and properties of SAP-based glass-ceramics. The results show that ZrO2 addition improves the formation of NZP phase while restricting the crystallization of AlPO4 phases. The correct ratios of ZrO2 and B2O3 allow only the formation of NZP phase within the SAP glass.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Hwasung Yeom, Greg Johnson, Benjamin Maier, Tyler Dabney, Kumar Sridharan
Summary: Cr-Nb bilayer coatings were developed using cold spray deposition to improve the limiting operational temperature of Cr-coated Zr-alloy system. The coatings exhibited outstanding oxidation resistance at high temperatures and formed continuous intermetallic compound layers at the interfaces.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Padhraic L. Mulligan, Andrew T. Nelson, Chad M. Parish, Patrick A. Champlin, Xiang Chen, Daniel Morrall, Jason M. Harp
Summary: Environmental barrier coatings are being developed to reduce oxidation and embrittlement in Zr-based materials. Chromium nitride is a candidate for this application, but understanding its impact on irradiation-induced creep and microstructure is critical.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Dexuan Yan, Xinlei Cao, Ke Shen
Summary: This study investigated the purification mechanism of polycrystalline graphite by comparing IG-11 graphite with IG-110 nuclear grade graphite. The analysis revealed that metallic impurities in IG-11 were primarily segregated within graphite porosities, while IG-110 demonstrated a significant reduction in impurities. This research contributes to the development of innovative graphite purification techniques for greater purity and stronger oxidation resistance.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Wei Xu, Wei Peng, Lei Shi, Qi Sun
Summary: This paper investigates the oxidation and shape evolution of matrix graphite in high temperature gas-cooled reactors during air-ingress accidents. A reaction kinetics model is established and computational fluid dynamics with a dynamic mesh method is used to simulate the oxidation process. The results show that the geometric shape of graphite changes significantly with increasing flow rate, and the graphite pebbles tend to form a structure with a narrow front and wide tail.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Allison Harward, Casey Elliott, Michael Shaltry, Krista Carlson, Tae-Sic Yoo, Guy Fredrickson, Michael Patterson, Michael F. Simpson
Summary: This paper investigates the hygroscopic properties of eutectic LiCl-KCl absorbed into zeolite-4A. The study finds that water absorption and corrosion worsen with increasing salt loading. It also suggests that the salt can be stored in a non-inert atmosphere for a certain period of time.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Takaaki Koyanagi, Xunxiang Hu, Christian M. Petrie, Gyanender Singh, Caen Ang, Christian P. Deck, Weon-Ju Kim, Daejong Kim, James Braun, Yutai Katoh
Summary: This study provides critical experimental data on the effects of irradiation on the hermeticity of SiC composite cladding, finding that irradiation can cause a decrease in hermeticity and cracking, and coating the outer surface can mitigate the cracking issue.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
S. Krat, A. Prishvitsyn, Yu. Gasparyan
Summary: This study proposes a probabilistic and diffusion-based model to describe the co-deposition of multiple hydrogen isotopes with slowly grown metal layers. The model calculates the relative concentrations of different hydrogen isotopes in the co-deposited metal layers. It is found that if hydrogen isotopes have different detrapping energies, only the isotope with the highest detrapping energy shows a monotonic decrease in concentration with deposition temperature. Furthermore, the study evaluates the uncertainty of tritium concentration in the co-deposited layer based on the uncertainty in detrapping energy of tritium and deuterium, predicting a >10% tritium concentration uncertainty for a 0.01 eV difference.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Tijo Vazhappilly, Arup Kumar Pathak
Summary: This study investigates the effect of Ce atom substitution in UO2 on its thermophysical properties using density functional theory. The results show that the Ce substitution levels and the oxidation state of Ce/U atoms strongly influence the band structure and specific heat capacity of the UO2 lattice. These findings provide important insights into the fuel properties of UO2 under reactor conditions.
JOURNAL OF NUCLEAR MATERIALS
(2024)
