Article
Chemistry, Physical
Z. Li, R. Parsons, H. Kishimoto, T. Shoji, A. Kato, J. Karel, K. Suzuki
Summary: This study investigated the glass-forming range, microstructural features, and soft magnetic properties of (Fe(1-x-)yCo(x)Ni(y))(86)B-14 alloys. It was found that Fe-rich compositions have the largest glass-forming range and exhibit nano-scale grains with bcc and fcc structures after ultra-rapid annealing. The coercivity and saturation magnetic polarization of the nanocrystalline alloys are affected by Co and Ni content, with Co addition generally increasing coercivity and saturation magnetic polarization, while Ni addition has the opposite effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Yan Zhang, Zhi Wang, Xian-hua Li, Qian-qian Hao, Rui-min Shi
Summary: Investigation of the structure and soft magnetic properties of nanocrystalline (Fe0.9Co0.1)(72.7)Al0.8Si13.5Cu1Nb3B8V1 alloy annealed at 510-690 degrees C revealed that with increasing annealing temperature, grain size and volume fraction of the crystalline phase increased while the thickness of the amorphous layer decreased. Higher annealing temperatures resulted in improved high-temperature initial permeability up to 630 degrees C, but a dramatic deterioration was observed at 690 degrees C due to the precipitation of hard magnetic phase.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Ceramics
Min Zhao, Jing Pang, Yiran Zhang, Wei Zhang, Qingchun Xiang, Yinglei Ren, Xiaoyu Li, Keqiang Qiu
Summary: A (Fe0.83B0.11Si0.02P0.03C0.01)(99.5)Cu-0.5 glass former was developed based on Fe83B11Si2P3C1 alloy. A new rapid annealing method was used to investigate the effect of temperature and time on the improvement of soft magnetic properties. The results show that the addition of Cu expands the interval between the first and second crystallization temperature. The alloy ribbon annealed by the new method exhibits higher saturation magnetization and lower coercivity compared to other nanocrystalline alloys with similar Fe content.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
M. Salaheldeen, A. Garcia, P. Corte-Leon, M. Ipatov, V. Zhukova, A. Zhukov
Summary: This article presents a new Co2FeSi glass-coated microwire with a nanocrystalline structure obtained using the Taylor-Ulitovsky technique. The annealing process significantly increased the size of the nanograins and resulted in the observation of perfect square hysteresis loops. The annealed samples exhibited dramatic magnetic behavior at low temperatures and showed critical temperature points where the magnetic behavior changed. The anomalous magnetic behavior can be attributed to the coexistence of ordered and disordered phases induced by annealing conditions. The presence of the glass coating influenced the magnetization behavior and mechanical properties of the Co2FeSi microwires.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Minhao Han, Cheng Sun, Hongjie Xu, Yang Meng, Qiang Luo, Boying Qiao, Yani Xu, Tao Zhang
Summary: This study investigates the effect of rapid annealing (RA) on the crystallization behavior and soft magnetic properties of Fe-Co-B amorphous alloys. It is found that RA generates large superheating which increases the homogenous nucleation rate of nanocrystals, while the short duration inhibits the growth kinetics, resulting in fine and dense nanograins. The Fe-Co-B alloy exhibits optimized properties of low coercivity and high saturation magnetization after RA treatment. In contrast, conventional annealing produces large and sparse grains with high coercivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Gokhan Polat, Mustafa Tekin, Hasan Kotan
Summary: CoCrFeNi high entropy alloys have been nanostructured and annealed with yttrium additions. The study investigates the effects of solute addition and annealing temperature on the structure, grain growth, and hardness. The results show that yttrium additions can retard grain growth and enhance thermal stability.
Article
Materials Science, Multidisciplinary
Mahdi Harivandi, Mehdi Malekan, S. A. Seyyed Ebrahimi
Summary: In this study, equiatomic FeCoNiCuMn high entropy alloy was prepared and its microstructure and properties were improved by annealing. The alloy exhibited good soft magnetic properties and high electrical resistivity, along with proper strength and ductility.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Chemistry, Physical
R. Parsons, K. Onodera, H. Kishimoto, T. Shoji, A. Kato, K. Suzuki
Summary: The effect of applied stress during ultra-rapid annealing on the magnetic properties of rapidly-solidified alloys was investigated. The results showed that nanometer-scale grains with low coercivity were obtained under the annealing condition. The saturation magnetic polarization of the nanocrystalline alloys increased slightly with Co content. A stress-induced anisotropy was observed, and the saturation magnetostriction increased with Co content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Li-Cheng Wu, Yan-Hui Li, Xing-Jie Jia, Ai-Na He, Wei Zhang
Summary: The effects of ribbon thickness on the structure and magnetic properties of Fe82.3B13Cu1.7Nb3 alloy were investigated, revealing that increasing thickness led to different nanostructures and changes in magnetic properties.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Materials Science, Ceramics
Yu Sun, Jiawei Li, Lei Xie, Aina He, Yaqiang Dong, Yanxin Liu, Changjiu Wang, Kewei Zhang
Summary: The Si/B ratio has a significant effect on the magnetic properties of Fe-Si-Nb-Cu-Al alloys, with a slight increase in Si/B ratio improving the soft magnetic properties and microstructure of the alloy. Substituting 2% Si for B increases the activation energy of alpha-Fe(Si) growth and Fe3B precipitation, leading to the formation of uniform and stable grains, ultimately improving the magnetic domain structure and soft magnetic properties of the alloy.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Rajiv Kumar, R. K. Singh Raman, S. R. Bakshi, V. S. Raja, S. Parida
Summary: The present study investigates the oxidation behavior of nanocrystalline (NC) and microcrystalline (MC) Fe-20Cr-5Al alloys at 900 degrees C. The results show that nanocrystallization reduces the Al requirement for the formation of a protective Al2O3 layer, leading to a significantly lower oxidation rate compared to microcrystalline alloy. Additionally, the microcrystalline alloy exhibits a higher weight gain than the nanocrystalline alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Yun Pan, Tiancheng Liu, Guangmin Li, Baiyang Dai, Na Lv
Summary: The study investigates the impact of relevant factors on the magnetic properties and structures of FeCuNbSiB nanocrystalline alloy in the tensile stress process. The results show that relevant factors significantly affect magnetic properties, DC tolerance property increases linearly with tensile stress, and the width of magnetic domains decreases with increasing tensile stress and annealing temperature.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Yaoxiang Geng, Yingmin Wang, Yuxin Wang, Zhijie Zhang, Hongbo Ju, Lihua Yu, Junhua Xu
Summary: The study investigated the effects of minor alloying addition of Cu on the glass-forming ability and crystallization process of Fe-based alloys. It was found that the addition of Cu could improve the glass-forming ability and result in the formation of single alpha-Fe phase nanocrystalline alloys with good soft magnetic properties.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Caitao Fan, Luyao Li, Wenxin Wen, Hongzhen Li, Jianan Fu, Wenqing Ruan, Shuai Ren, Sajad Sohrabi, Zhenxuan Zhang, Xiong Liang, Jiang Ma
Summary: Due to their unique design concept, high-entropy alloys (HEAs) exhibit unusual properties and lead to an emerging new field. In this study, it is shown that a typical face-centered cubic crystalline phase CoCrFeNiMn HEA can be easily transformed into the amorphous phase through ultrasonic vibration treatment at a frequency of 20000 Hz. Nanoscale hierarchical features, including twins, stacking faults bands, hexagonal-close packed phase bands, and amorphous bands, can be clearly observed in samples treated with different ultrasonic vibration energies. The main mechanism of ultrasonic vibration-induced amorphization is the promotion of amorphous phase formation through grain refinement when the defect density at grain boundaries reaches a critical level. Furthermore, mechanical instability is easily induced by ultrasonic vibration at high strain rate to generate amorphous phase inside grains. As a result of ultrasonic vibration treatment, the HEA samples exhibit significant improvement in mechanical performance, mainly attributed to microstructure evolution, especially the generation of the amorphous phase, such as yielding strength and hardness. This rapid amorphization process not only provides a potential strengthening mechanism for HEAs but also offers a novel approach to investigate the crystal-amorphous transition problem.
MATERIALS & DESIGN
(2023)
Article
Nanoscience & Nanotechnology
R. Parsons, K. Suzuki
Summary: Ultra-Rapid Annealing (URA) is an effective method for producing Fe-rich nanocrystalline soft magnetic materials. However, its scalability has been limited. In this study, a novel Continuous Ultra-Rapid Annealing (CURA) technique is introduced, which is suitable for industrial-scale production. Experimental results show that CURA can produce soft magnetic materials with comparable properties to URA and can be used for complex geometries, enhancing performance in commercial applications.
Article
Environmental Sciences
Mateusz Kaminski, Jakub M. Gac, Piotr Sobiech, Pawel Kozikowski, Szymon Jakubiak, Tomasz Jankowski
Summary: The dynamics of filtration efficiency and pressure drop during the simultaneous filtration of soot and oil aerosols on single-and multi-layer filters were investigated. The addition of oil aerosols decreased the filtration efficiency and lowered the pressure drop increase rate for multi-layer filters. Furthermore, for aerosols containing soot and high oil concentrations, an efficiency decrease occurred once maximum filtration efficiency was reached. The system imperfection factor and modified single fibre efficiency method were proposed to predict the efficiency and calculate filter mass change.
AEROSOL AND AIR QUALITY RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Piotr Bazarnik, Aleksandra Bartkowska, Yi Huang, Karol Szlazak, Boguslawa Adamczyk-Cieslak, Jordi Sort, Malgorzata Lewandowska, Terence G. Langdon
Summary: This study presents a method of utilizing high-pressure torsion (HPT) to fabricate a novel hybrid material by direct bonding of aluminum and titanium disks at room temperature. Detailed structural observations reveal the formation of a multi-layered nanostructure in the edge regions of the disks, which leads to exceptional hardness in the hybrid material. The investigation highlights the potential of HPT processing for diffusion bonding, mechanical joining technologies, and the fabrication of valuable hybrid nanomaterials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Agnieszka Teresa Krawczynska, Michael Kerber, Przemyslaw Suchecki, Barbara Romelczyk-Baishya, Maciej Oskar Liedke, Maik Butterling, Eric Hirschmann, Andreas Wagner, Malgorzata Lewandowska, Daria Setman
Summary: The impact of high-pressure release after high-pressure torsion on subsequent high-pressure annealing of nanostructured Ni was analyzed. It was found that the applied pressure increased microhardness, reduced grain size, and improved the heterogeneity of the microstructure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Agnieszka Brochocka, Aleksandra Nowak, Pawel Kozikowski
Summary: The study introduced polymer non-woven fabrics with carbon sorbents to test their breakthrough time and protection against vapors present in smog. Increasing carbon sorbent quantity prolongs breakthrough time, but may also increase air flow resistance. A balance must be found between protective parameters and functionality, with optimal filter composition determined by comparing breakthrough times for different carbon sorbent quantities. High sorbent-specific surface area directly translates to greater filter performance.
Article
Chemistry, Physical
Kamila Salasinska, Peteris Cabulis, Mikelis Kirpluks, Andrejs Kovalovs, Pawel Kozikowski, Mateusz Barczewski, Maciej Celinski, Kamila Mizera, Marta Galecka, Eduard Skukis, Kaspars Kalnins, Ugis Cabulis, Anna Boczkowska
Summary: The production method and fabric layout have a significant impact on the mechanical and fire behavior of hybrid layered composites. Composites made by vacuum bagging exhibit lower flammability and smoke emission, making them suitable for industries with high requirements such as railways and automotive.
Article
Chemistry, Physical
Malgorzata Okrasa, Milena Leszczynska, Kamila Salasinska, Leonard Szczepkowski, Pawel Kozikowski, Adriana Nowak, Justyna Szulc, Agnieszka Adamus-Wlodarczyk, Michal Gloc, Katarzyna Majchrzycka, Joanna Ryszkowska
Summary: This study aims to develop viscoelastic polyurethane foams for better fit and comfort in respiratory protective devices (RPDs). Various tests and analyses were conducted to determine the direction for improving foam properties.
Correction
Chemistry, Physical
Kamila Salasinska, Milena Leszczynska, Maciej Celinski, Pawel Kozikowski, Krystian Kowiorski, Ludwika Lipinska
Article
Chemistry, Multidisciplinary
Pawel Kozikowski, Piotr Sobiech
Summary: The aim of this study was to determine the usability of electron microscopy in assessing inhalation exposure and extracting morphological information. The results showed that electron microscopy could provide a more accurate observation of the morphological parameters of nanoparticles compared to real-time spectroscopy measurements.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Article
Chemistry, Physical
Agnieszka Greszta, Grazyna Bartkowiak, Anna Dabrowska, Eulalia Gliscinska, Waldemar Machnowski, Pawel Kozikowski
Summary: This study assessed the use of developed nonwoven inserts with aerogel/PCM microcapsules in cold protective clothing, aiming to improve thermophysiological comfort properties. The results showed that the use of aerogel reduced the thermal conductivity of the insert, while PCM microcapsules improved heat absorption and release. Therefore, the use of aerogel and PCM in cold protective clothing is an effective solution.
Article
Energy & Fuels
Sebastian Staszko, Marzena Polka, Pawel Kozikowski
Summary: This paper presents the influence of selected flame retardant additives on heat release rate and thermokinetics properties of epoxy materials made of epoxy resin-Epidian 5. The results show that adding Mg(OH)(2) or Roflam F5 and Al(OH)(3) can reduce the heat release rate and increase the thermal decomposition temperature.
Article
Engineering, Civil
Ewa Ura-Binczyk, Krzysztof Kulikowski, Witold Chrominski, Jerzy Smolik, Malgorzata Lewandowska
Summary: AlCr and AlCrFe coatings were deposited on carbon steel C45 and titanium grade 2 substrates via magnetron sputtering. The coatings have an amorphous structure, a thickness of 3-4 μm, and are uniform in terms of thickness and chemical composition. No major defects were observed at the interface, but there was no diffusion at the interface, indicating adhesive bonding and relatively low adhesion. The coatings exhibit a hardness of about 8-10 GPa and a Young's modulus above 150 GPa, slightly higher for the steel substrate. The coatings provide good corrosion resistance for the steel substrate but underperform for the Ti grade 2.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Monika Borucka, Kamila Mizera, Jan Przybysz, Pawel Kozikowski, Agnieszka Gajek
Summary: This study provides valuable data on the specific toxic products released from commercially used flexible polyurethane foams (FPUFs) during fires. The study utilized a steady-state tube furnace to generate combustion and thermal degradation products under different fire conditions. The results show that the emission of carbon monoxide, hydrogen cyanide, and other harmful organic compounds during the degradation and combustion of FPUFs poses a serious threat to human life and health.
Article
Polymer Science
Mateusz Kaminski, Jakub M. Gac, Piotr Sobiech, Pawel Kozikowski, Tomasz Jankowski
Summary: This study investigates the dynamics of pressure drop during the filtration of three-component mixture aerosols and compares them with two and single-component aerosols. The addition of a small quantity of liquid and solid particles during the filtration of aerosols containing water mist is of particular interest. The study also compares the calculations of filter mass change during oil aerosol filtration with experimental results.
Article
Nanoscience & Nanotechnology
Pedro Henrique R. Pereira, Piotr Bazarnik, Yi Huang, Malgorzata Lewandowska, Terence G. Langdon
Summary: Experiments were conducted to investigate the flow behavior and microstructural stability of Al-3Mg-0.2Sc alloy treated with high-pressure torsion at different temperatures. The results indicate that the yield strength and microstructural stability of the alloy are influenced by the processing temperature. Additionally, evidence of dynamic strain aging was observed during annealing.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Environmental Sciences
Mateusz Kaminski, Jakub M. Gac, Piotr Sobiech, Pawel Kozikowski, Tomasz Jankowski
Summary: This study developed a methodology for calculating aerosol filtration efficiency using non-woven filters with polydispersity distribution of fiber diameters. The results show that dividing the diameter distribution into multiple ranges can minimize the error caused by the underrepresentation of the fiber distribution.
AEROSOL AND AIR QUALITY RESEARCH
(2022)
