Article
Engineering, Chemical
Masoud Shahidi Moghadam, Abdolali Fayyaz, Mohammad Ardestani
Summary: This research studied the challenges of fabricating titanium components through low-pressure powder injection moulding (LPIM). It was found that feedstock with high powder loading was not suitable for LPIM, and suitable parameters for solvent debinding were obtained by soaking the samples in n-hexane at 60 degrees C temperature. After sintering, the hardness and density of the sintered part were 490 HV and 4.11 g/cm³, respectively, with coarse alpha plates and alpha/beta colonies observed in the microstructure.
Article
Polymer Science
Alberto Basso, Yang Zhang, Jacob Kjeldahl Ploger, Jon Spangenberg, Hans Norgaard Hansen
Summary: This study explores the use of freeform injection moulding technology, highlighting the benefits of using 3D printed moulds for increased geometrical design flexibility. By injecting stainless steel powder suspension into a geometrically challenging sacrificial mould, the numerical model developed aligns well with experimental findings, offering a new approach for evaluating sacrificial inserts in high geometrical complexity powder injection moulding processes.
Article
Materials Science, Multidisciplinary
Raquel Astacio, Fatima Ternero, Jesus Cintas, Francisco G. Cuevas, Juan Manuel Montes
Summary: This paper investigates the fabrication of soft magnetic Fe parts using the medium-frequency electrical resistance sintering (MF-ERS) technique, analyzing the porosity distribution, microhardness, electrical resistivity, and hysteresis curves of the final compacts. The results are compared with those of compacts consolidated by conventional powder metallurgy (PM) route and fully dense compacts obtained by double cycle of cold pressing and furnace sintering in hydrogen atmosphere.
Article
Engineering, Industrial
Anatolii Andreiev, Kay-Peter Hoyer, Florian Hengsbach, Michael Haase, Lennart Tasche, Kristina Duschik, Mirko Schaper
Summary: The research investigates the use of a build-chamber preheating system in a standard PBF-LB machine to overcome the brittleness challenges of iron-silicon alloys, enabling defect-free and crack-free manufacturing of large-scale samples and components. The study also analyzes the influence of silicon content on the soft-magnetic and mechanical behavior of additively processed iron-silicon alloys.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Sviatoslav Vovk, Samuel Dobak, Jan Fuzer, Peter Kollar, Radovan Bures, Maria Faberova
Summary: This study investigates the magnetic properties of soft magnetic composites (SMCs) based on Fe/SiO2/ferrite at different temperatures. The results show that an increase in temperature affects the magnetic properties, necessitating consideration of the temperature effect. By analyzing energy losses and using the Statistical Theory of Losses, the magnetic properties at different ferrite contents and temperatures are studied. Frequency-temperature maps reveal a decrease in relative permeability values above 125 degrees C, associated with the Curie temperature of ferrite. It is found that the composite with 2% ferrite achieves excellent magnetic properties, with an initial relative permeability of 84 and energy loss of 57 J/m3.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Takuma Teramae, Takayuki Tanaka, Mizuki Fukuo, Kazuki Shitara, Junko Umeda, Shufeng Li, Abdulaziz Alhazaa, Katsuyoshi Kondoh
Summary: Commercial pure Ti alloys are often used in biomedical applications, but they need to be strengthened by adding alloying elements. Ti-Fe alloys modified with Zr were investigated in this study to produce high-strength, ductile, and biocompatible alloys. The addition of Zr solid solution increased lattice constants and refined grain size, leading to improved mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Coatings & Films
Sergio dos Anjos, Fernando Henrique da Costa, Edwin Sallica-Leva, Rubens Caram, Vicente Amigo, Joao Batista Fogagnolo
Summary: Laser surface treatments can improve material properties in sintered parts. Preplaced powder laser alloying results in deeper fusion zones and higher alloy dilution. Modified layers have higher hardness than substrates, and different alloy elements affect surface layer elastic modulus differently.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Min Young Lee, Yeon Jun Choi, Seok Hee Lee, Ji Hun Ahn, Bo Wha Lee
Summary: The effect of microstructural deformation on soft magnetic metal powders in a power inductor operating above 1 MHz was studied. The results showed that the core with a 20 wt% nano Fe powder content had the highest packing fraction and permeability, and the sample with the highest packing fraction had relatively low core loss compared to other samples.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Fevzi Kelen
Summary: In this study, AZ91D magnesium alloy was successfully produced by reinforcing with a combination of Ti and Ni microparticles for the first time. The optimized fabrication parameters resulted in nearly full density and pore-free microstructure. The hybrid composites showed enhanced mechanical properties and could easily meet the temperatures and stresses that automobile components are exposed to under service conditions. The low-density values of the produced hybrid composites make them a significant alternative to conventional materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Chemistry, Physical
Viktors Mironovs, Yulia Usherenko, Irina Boiko, Jekaterina Kuzmina
Summary: High strength fibers like carbon and boron are commonly used to reinforce metal matrix composite materials. The waste containing such fibers poses environmental hazards and requires careful disposal. Recycling these materials is important for cost reduction and meeting production demands.
Article
Materials Science, Multidisciplinary
Addison J. Rayner, Stephen F. Corbin
Summary: Advanced sintering practices for MIM nickel superalloys lead to fine-grain microstructures, but the formation of carbides restricts grain growth. The study evaluates the ability to activate grain growth in MIM NiSA during SLPS using DSC, finding that time above the solidus temperature can dissolve carbides and promote grain growth. This research highlights the challenges of accessing grain growth in MIM and demonstrates the potential of SLPS to increase grain size in MIM NiSA.
MATERIALS TODAY COMMUNICATIONS
(2021)
Review
Engineering, Manufacturing
Kishor Kumar Sadhu, Nilrudra Mandal, Rashmi R. Sahoo
Summary: The demand for lightweight structural and engine materials in automobile and aerospace applications has led to the development of aluminum-based composite materials, which have properties such as high strength, stiffness, and low density. The incorporation of SiC and graphene particles has been studied to improve the properties of aluminum metal matrix composites. The reinforcement mechanisms provided by SiC and graphene have shown significant improvements in thermal and mechanical properties.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
J. O'Flynn, S. F. Corbin
Summary: By investigating the heat treatment behavior of metal injection molded (MIM) and wrought alloy 718 using DSC, microscopy, and hardness measurements, it was observed that increasing temperatures and times led to an increase in hardness due to the precipitation of gamma' and gamma. The differences in heat treatment behavior appeared to be mainly influenced by variations in chemical composition rather than processing route.
MATERIALS CHARACTERIZATION
(2021)
Article
Crystallography
Azam Beigi Kheradmand, Mohammad Reza Fattahi, Morteza Tayebi, Bejan Hamawandi
Summary: The study demonstrated that by increasing the SiC content to the optimal value of 10%, the composite material showed improved wear resistance and hardness, making it suitable for brake pad applications.
Article
Chemistry, Physical
A. Raja Annamalai, A. Muthuchamy, Muthe Srikanth, Senthilnathan Natarajan, Shashank Acharya, Anup Khisti, Chun-Ping Jen
Summary: The addition of molybdenum to the W-Ni-Fe alloy significantly affects its material properties, with the 45W-45Mo alloy showing the smallest grain size and highest mechanical strength, while the 67.5Mo alloy exhibits the highest hardness.
Article
Engineering, Manufacturing
Sergio de Juan, Elena Gordo, Antonia Jimenez-Morales, Frederic Sirois
Summary: The study found that coating carbon fiber reinforced composites with a thin copper layer can improve their performance under high current by serving as sacrificial protection. Samples treated for longer times had larger affected coating areas and lower surface delamination in the composite materials. An interesting relationship was found between charge transfer and damaged areas among all samples.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Review
Materials Science, Multidisciplinary
Monica Campos, Jose M. Torralba, Raquel de Oro, Elena Bernardo, Andrea Galan-Salazar
Summary: The Master-alloy (MA) alloy route has the potential to reduce costs in low alloyed sintered steels and introduce innovative alloy systems with Cr, Mn and Si, but meeting multiple requirements is necessary to modify the performance of steels. Efforts have been made to properly design the composition of MA, identify reducing agents, and understand their effects on wetting and liquid spreading in sintered parts for efficient development of steels.
Article
Materials Science, Multidisciplinary
E. Carreno-Morelli, P. Alveen, S. Moseley, M. Rodriguez-Arbaizar, K. Cardoso
Summary: Cemented carbide parts manufactured by "Solvent on Granules 3D-Printing" show excellent physical properties and functionality, comparable to traditional parts, and have successfully undergone concrete drilling tests.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jose M. Torralba, S. Venkatesh Kumaran
Summary: One of the main drawbacks of the powder metallurgy route for High-Entropy Alloys (HEAs) is the unavailability of fully pre-alloyed powders in the market. However, using commodity powders to produce HEAs presents a completely new and competitive scenario for obtaining viable alloys for high-performance applications.
Editorial Material
Materials Science, Multidisciplinary
Jose Manuel Torralba
Article
Engineering, Manufacturing
Marius A. Wagner, Amir Hadian, Tutu Sebastian, Frank Clemens, Thomas Schweizer, Mikel Rodriguez-Arbaizar, Efrain Carreno-Morelli, Ralph Spolenak
Summary: This study presents the development of a multi-component binder system for 3D printing of 316 L stainless steel, allowing precise control of the mechanical and rheological properties of the material.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Ceramics
Eduardo Tabares, Michael Kitzmantel, Erich Neubauer, Antonia Jimenez-Morales, Sophia A. Tsipas
Summary: The research explores the feasibility of printing Ti3SiC2 and Cr2AlC using composite extrusion modeling, studying the rheological properties of the feedstocks and the impact of printing parameters on MAX phases. Microstructural analysis and final sample characterization were performed to determine the suitability of the technique for obtaining near-net shape MAX phase parts.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Beatriz Toirac, Amaya Garcia-Casas, Miguel A. Monclus, John J. Aguilera-Correa, Jaime Esteban, Antonia Jimenez-Morales
Summary: In this study, biodegradable sol-gel coatings were investigated as a carrier for preventing infection in joint prostheses. The coatings showed microscale roughness, but no evidence of chemical bonding between antibiotics and the siloxane network.
Article
Engineering, Manufacturing
Marius A. Wagner, Jona Engel, Amir Hadian, Frank Clemens, Mikel Rodriguez-Arbaizar, Efrain Carreno-Morelli, Jeffrey M. Wheeler, Ralph Spolenak
Summary: Filament extrusion-based additive manufacturing of metals provides a different microstructure compared to beam-based methods. The study shows that optimal microstructure of 316L stainless steel can be achieved through debinding and sintering under specific conditions, resulting in high density and avoiding detrimental hard phases.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Ceramics
Jose Sanchez del Rio, Alicia Paez-Pavon, Jose M. Torralba, Dariusz Garbiec, Jose S. Moya, Sonia Lopez-Esteban, Carlos Pecharroman
Summary: The feasibility of sintering Portland cement clinker powders by Spark Plasma Sintering (SPS) has been studied. Different SPSed compacts have been successfully obtained by this technique. The compacts have been characterized and it is found that slight mineralogical variations in the starting compositions may induce dramatic changes in the final mineralogical composition and morphology, affecting the properties of the SPSed compacts. The emergence of two transitory eutectic liquids is explained in a new model describing the formation of garnets, which allows for the creation of artificial garnets in the laboratory by applying low pressures, opening the door to compositions for specific applications with high added value.
CERAMICS INTERNATIONAL
(2023)
Article
Polymer Science
Xiao-Mei Yang, Guang-Zhong Yin, Olga Zafra Amoros, Maria Arroyo Hernandez, Jimena de la Vega, Jose Manuel Torralba
Summary: In this study, ZnO@PDA core-shell submicron particles were successfully synthesized using a self-polymerization method. The incorporation of ZnO@PDA in PLA effectively controlled the degradation rate and improved the mechanical properties. ZnO@PDA/PLA samples showed higher tensile strength and elongation at break, and exhibited better antibacterial activity against Gram(+) bacteria compared to pure PLA.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Alexandra Amherd Hidalgo, Thomas Ebel, Robert Frykholm, Efrain Carren-Morelli, Florian Pyczak
Summary: This study investigates the influence of oxygen on the tensile and high cycle fatigue properties of Ti-6Al-7Nb alloy processed by MIM. It is found that oxygen can be used as a strengthener, but excessive oxygen content leads to a significant decrease in ductility. The non-equilibrium microstructure plays a vital role in enhancing the strength and impairing the ductility, and it can be controlled by optimizing the cooling rate. Additionally, oxygen progressively reduces the high cycle fatigue properties of the alloy.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Polymer Science
Beatriz Toirac, John Jairo Aguilera-Correa, Aranzazu Mediero, Jaime Esteban, Antonia Jimenez-Morales
Summary: This study evaluated a novel hybrid organic-inorganic sol-gel coating in vitro, which was loaded with different concentrations of linezolid and/or cefoxitin. The coating effectively inhibited biofilm formation of Staphylococcus species without compromising cell viability and proliferation.
Article
Materials Science, Ceramics
Eduardo Tabares, Michael Kitzmantel, Erich Neubauer, Antonia Jimenez-Morales, Sophia A. Tsipas
Summary: This study evaluated the mechanical and wear properties of self-synthesized Ti3SiC2 and Cr2AlC MAX phase powders consolidated by different powder metallurgy routes. The microstructure, phase constitution, and porosity of the samples were analyzed, and the wear behavior was studied through reciprocating-sliding tests.
CERAMICS-SWITZERLAND
(2022)
Correction
Engineering, Manufacturing
Agustin Jose Torroba, Ole Koeser, Loic Calba, Laura Maestro, Efrain Carreno-Morelli, Mehdi Rahimian, Srdjan Milenkovic, Ilchat Sabirov, Javier LLorca
INTEGRATING MATERIALS AND MANUFACTURING INNOVATION
(2021)
