Article
Materials Science, Multidisciplinary
Huizi Chen, Jian Wang, Xiangchen Meng, Yuming Xie, Yulong Li, Long Wan, Yongxian Huang
Summary: Utilizing friction stir processing, an ultrafine-grained structure was achieved in Mg-Zn-Y-Zr alloy leading to extraordinary superplasticity. Grain refinement and homogeneous dispersion of precipitates were promoted by the coupled thermo-mechanical effect, resulting in an ultra-fined grains size of 1.9 +/- 0.4 μm and a superplastic elongation of 642%. Grain boundary sliding was considered as the predominant superplastic deformation mechanism in ultrafine-grained materials.
Article
Materials Science, Multidisciplinary
Danil Barilyuk, Andrey Bazlov, Natalia Arkharova, Tatyana Teplyakova, Anton Konopatsky, Sergey Prokoshkin
Summary: Four novel superelastic alloys, Ti-41Zr-12Nb, Ti-42Zr-11Nb, Ti-43Zr-10Nb, Ti-44Zr-10Nb, were obtained and studied for their microstructure and mechanical properties, showing pronounced superelastic behavior after thermomechanical treatment. Among them, Ti-41Zr-12Nb demonstrated the highest ductility and is considered one of the most promising alloys in the Ti-Zr-Nb system.
Article
Materials Science, Multidisciplinary
Mohammadreza Sadrkhah, Ghader Faraji, Somayeh Khorasani, Mohsen Mesbah
Summary: The aim of this study is to investigate the impact of microstructuring plus a surface modification method named SLActive on the mechanical properties and biocompatibility of coarse-grained (CG) titanium grade 2 through in vitro tests. SLActive is a developed method based on SLA. The study involved grain-refinement of CG-Ti grade 2 using equal channel angular pressing (ECAP), followed by the application of SLA and SLActive methods on various titanium alloys. Results showed that UFG-Ti-gr2 exhibited improved mechanical properties comparable to Ti-6Al-4 V, increased microhardness, and the roughest surface among the tested materials. MTT test demonstrated the highest cell viability and proliferation for SLActive UFG-Ti-gr2, suggesting its potential for dental implant production.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Chemistry, Physical
Murillo Romero da Silva, Piter Gargarella, Athos Henrique Plaine, Josephine Zeisig, Simon Pauly, Uta Kuehn, Claudemiro Bolfarini
Summary: In this study, the Ti-29Nb-13Ta-4.6Zr-0.070 (TNTZO) alloy was processed by high-pressure torsion (HPT) and its microstructure, phase stability, elastic behavior, mechanical properties, and deformation mechanisms were investigated. An increase in beta-phase stability, significant hardening, and a new reverse martensitic transformation mechanism were observed after severe plastic deformation. The greater hardness was attributed to microstructural refinement, high dislocation density, and stress-induced formation of the omega-phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
T. S. Orlova, D. I. Sadykov, D. V. Danilov, N. A. Enikeev, M. Yu. Murashkin
Summary: By modifying the alloy's defect structure, the elongation to failure of ultrafine-grained Al-Cu-Zr alloy can be notably increased. This phenomenon is discussed in terms of interfacial dislocation emission and interaction of dislocations with grain boundaries in different states.
Article
Biochemistry & Molecular Biology
Yuliya Y. Khrunyk, Sabrina Ehnert, Stella Grib, Anatoly G. Illarionov, Stepan Stepanov, Artemiy A. Popov, Maxim A. Ryzhkov, Sergey Belikov, Zeqian Xu, Frank Rupp, Andreas K. Nuessler
Summary: A novel low elastic modulus Ti-based alloy was synthesized and analyzed, showing lower elastic modulus and good in vitro biocompatibility compared to Ti-6Al-4V. O-2 plasma treatment significantly increased the hydrophilicity and in vitro biocompatibility of the alloy, while not inducing inflammatory responses. These results suggest that the TNZTS alloy may be a potential alternative to Ti-6Al-4V.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Yuuka Iijima, Takeshi Nagase, Aira Matsugaki, Pan Wang, Kei Ameyama, Takayoshi Nakano
Summary: By applying empirical alloy parameters and thermodynamic calculations, new noble nonequiatomic Ti-Zr-Hf-Nb-Ta-Mo high-entropy alloys for metallic biomaterials were designed. The Mo equivalent and valence electron concentration parameters were found to be useful for alloy design, including BCC structure formation in bio medium-entropy alloys and BioHEAs.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Wei Yang, Shu-Jie Pang, Guan Wang, Ying Liu, Peter K. Liaw, Tao Zhang
Summary: Ti-Zr-Hf-Nb-Ta-Sn high-entropy alloys with good mechanical properties, corrosion resistance, and biocompatibility were developed as potential biomaterials. The addition of Sn improved the compressive yield strengths and hardness of the alloys. These alloys also possessed relatively low Young's moduli. The Ti-Zr-Hf-Nb-Ta-Sn alloys with the integration of high yield strength, relatively low Young's modulus, and good corrosion resistance and biocompatibility are promising for biomedical applications.
Article
Chemistry, Physical
Wei Yang, Shujie Pang, Ying Liu, Qing Wang, Peter K. Liaw, Tao Zhang
Summary: Novel high-entropy alloys (HEAs) with excellent mechanical properties and biocompatibility have been designed and synthesized for biomedical applications, demonstrating great potential in the field.
Article
Chemistry, Physical
Meichen Hu, Li Wang, Gen Li, Qianli Huang, Yang Liu, Junyang He, Hong Wu, Min Song
Summary: This study investigates the potential of three medium entropy alloys (MEAs) as biomedical materials. The alloys exhibit a dendrite microstructure, which can be reduced through homogenization treatment. The MEAs show good compressive ductility and yield strength, as well as excellent corrosion resistance and cyto-compatibility. The Ti-Nb-Zr MEAs have promising potential in biomedical applications.
Article
Nanoscience & Nanotechnology
Murillo Romero da Silva, Piter Gargarella, Athos Henrique Plaine, Simon Pauly, Claudemiro Bolfarini
Summary: This study investigated the microstructural evolution, thermal stability, physical and mechanical properties of Gum Metal Ti-29Nb-13Ta-4.6Zr-xO with different oxygen contents prepared by high-pressure torsion (HPT). The increase in hardness was attributed to the microstructural refinement, defects formation, and stress-induced co-phase formation. Samples with higher oxygen content and deformed by HPT exhibited a Vickers microhardness of approximately 400 HV.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Nguyen Q. Chinh, Maxim Yu Murashkin, Elena Bobruk, Janos L. Labar, Jeno Gubicza, Zsolt Kovacs, Anwar Q. Ahmed, Verena Maier-Kiener, Ruslan Z. Valiev
Summary: This study discovered ultralow-temperature superplasticity in commercial 7xxx Al alloy for the first time, providing a foundation for the development of new technologies to manufacture complex-shaped metallic parts with enhanced service properties.
MATERIALS RESEARCH LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Yonghao Zhao, Yanglin Gu, Yazhou Guo
Summary: The conventional engineering stress-strain curve cannot accurately describe the true stress-strain and local deformability of the necking part of tensile specimens. By employing 3D optical measuring digital image correlation, it is possible to systematically measure the full strain field and local strain during the whole tensile process. Ultrafine-grained (UFG) Ti exhibits high plastic deformability in the necking region under a complex stress state, as revealed by finite elemental modeling and scanning electron microscopic study.
Article
Chemistry, Physical
Huang Liu, Jingxi Zhang, Chengshang Zhou, Pei Sun, Yong Liu, Zhigang Zak Fang
Summary: This paper investigates the effect of Nb alloying on the microstructure and hydrogen storage properties of Ti-Fe-Zr-Mn-Nbx alloys. The addition of 2% Nb enables a good combination of the hydrogen capacity and activation property, while Zr-rich phases play a critical role in the activation behavior. However, high Nb addition (> 4%) leads to the reduction of Zr-rich phases and deteriorates the activation kinetics. Nb addition also promotes the formation of the TiFe main phase and increases capacities at ambient temperature. The correlations between microstructure and hydrogen storage performance provide insights into tailoring hydrogen storage properties by alloying TiFe with multi-elements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Ka-Kin Wong, Hsueh-Chuan Hsu, Shih-Ching Wu, Wen-Fu Ho
Summary: Three nonequiatomic Ti-rich Ti-Zr-Nb-Mo medium-entropy alloys were developed for biomedical applications, exhibiting high yield strength, low elastic moduli, and excellent resilience. The distortion effect caused by alloying atomic radius difference contributed to the superior yield strengths of the alloys. Increasing Ti content can prevent segregation issues and reduce the elastic modulus.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Vasily Klimenov, Evgeny Kolubaev, Klopotov Anatoly, Andrey Chumaevskii, Artem Ustinov, Irina Strelkova, Valery Rubtsov, Denis Gurianov, Zeli Han, Sergey Nikonov, Andrey Batranin, Margarita Khimich
Summary: Based on the multilevel approach, the study investigated the structure and properties of titanium alloy in the high-performance additive manufacturing process using wire-feed electron beam technology. Non-destructive X-ray control, tomography, optical and scanning electron microscopy techniques were employed to analyze the structure at different scales. The mechanical properties under stress were determined through observation of deformation development using a Vic 3D laser scanning unit. The interrelations between structure and material properties, caused by the printing process and welding wire composition, were revealed through microstructural and macrostructural data analysis, as well as fractography.
Article
Materials Science, Multidisciplinary
Elena Legostaeva, Anna Eroshenko, Vladimir A. Vavilov, Vladimir Skripnyak, Nikita Luginin, Arsenii Chulkov, Alexander V. Kozulin, Juergen Schmidt, Alexey Tolmachev, Pavel Uvarkin, Yurii Sharkeev
Summary: The microstructural investigation, mechanical properties, and energy accumulation and dissipation of the magnesium alloy Mg-2.9Y-1.3Nd were studied in the recrystallized state and after severe plastic deformation (SPD) by extrusion. The use of SPD resulted in the formation of a bimodal structure, increased yield strength, tensile strength, and plasticity, and caused substructural hardening, phase composition redistribution, and texture formation. SPD also led to a redistribution of thermal energy and reduced the strain hardening coefficient.
Article
Chemistry, Multidisciplinary
Marina Breisch, Mateusz Olejnik, Kateryna Loza, Oleg Prymak, Nina Rosenkranz, Juergen Buenger, Christina Sengstock, Manfred Koeller, Goetz Westphal, Matthias Epple
Summary: Six types of titanium dioxide particles with different sizes, shapes, and crystal structures were prepared and characterized. The cytotoxicity and induction of reactive oxygen species of these particles were assessed, and it was found that all particles except for rutile microspheres had negligible toxicity. The rough surface of rutile microspheres induced pro-inflammatory cell reactions.
Article
Nanoscience & Nanotechnology
Zeming Sun, Thomas Oseroff, Zhaslan Baraissov, Darrah K. Dare, Katrina Howard, Benjamin Francis, Ajinkya C. Hire, Nathan Sitaraman, Tomas A. Arias, Mark K. Transtrum, Richard Hennig, Michael O. Thompson, David A. Muller, Matthias U. Liepe
Summary: Researchers have reported the successful synthesis of ZrNb(CO) thin films with high critical temperatures (Tc) under ambient pressure for the first time. The films were synthesized using a low-temperature electrochemical recipe combined with thermal annealing, resulting in a material with ultra-low surface resistance. The potential of ZrNb(CO) thin films for particle accelerators and other SRF applications has been demonstrated.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Valentina Vadimovna Chebodaeva, Nikita Andreevich Luginin, Anastasiya Evgenievna Rezvanova, Natalya Valentinovna Svarovskaya, Konstantin Vladimirovich Suliz, Ludmila Yurevna Ivanova, Margarita Andreevna Khimich, Nikita Evgenievich Toropkov, Ivan Aleksandrovich Glukhov, Andrey Aleksandrovich Miller, Sergey Olegovich Kazantsev, Maksim Germanovich Krinitcyn
Summary: This paper presents a study on the microstructure, phase composition, and mechanical characteristics of Fe-Cu-HA metal-ceramic composites, with a focus on microhardness. The findings show that varying the proportion of Fe-Cu-HA powder does not significantly affect the elemental and phase compositions of the material. X-ray phase analysis reveals the presence of three phases: alpha iron, copper, and hydroxyapatite. It is observed that an increase in the polymer component leads to an increase in structural defects and microstresses. Furthermore, increasing the mechanical properties of the composite is achieved by reducing the Fe-Cu-HA powder content from 50% to 40%. Interestingly, the composite containing 45% Fe-Cu-HA powder exhibits the highest microhardness increase of approximately 26% compared to the composite with 50% Fe-Cu-HA powder, attributed to a more uniform component distribution.
Article
Engineering, Biomedical
Mariya B. Sedelnikova, Alexander D. Kashin, Pavel V. Uvarkin, Alexey I. Tolmachev, Yurii P. Sharkeev, Anna V. Ugodchikova, Nikita A. Luginin, Olga V. Bakina
Summary: In this study, porous diatomite biocoatings were created on the surface of a biodegradable Mg alloy using the method of micro-arc oxidation. The addition of ZrO2 microparticles was found to affect the structure and properties of the coatings. The coatings exhibited a porous structure and increased adhesive strength and corrosion resistance with the incorporation of ZrO2 particles.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Engineering, Multidisciplinary
N. A. Stilin, A. Holic, M. Liepe, R. D. Porter, J. Sears, Z. Sun
Summary: Development of Nb3Sn coatings has enabled efficient RF operation at 4.2 K, making it possible to use cryocoolers instead of liquid helium for cooling SRF cavities. This eliminates the need for expensive cryogenic infrastructure, making SRF technology accessible to small-scale applications. Cornell University has developed a new cavity testing assembly using a Cryomech PT420-RM cryocooler to cool a 2.6 GHz Nb3Sn cavity, achieving breakthrough performance in conduction cooled cavities. The findings provide guidance for designing a cryocooler-based cryomodule for beam energy gains.
ENGINEERING RESEARCH EXPRESS
(2023)
Article
Chemistry, Multidisciplinary
Kathrin Kostka, Matthias Epple
Summary: Calcium phosphate nanoparticles were modified with polyethyleneimine or carboxymethylcellulose and coated with a silica shell terminated with azide or alkyne groups. These particles were then covalently functionalized with proteins or gold nanoparticles using click chemistry. The functionalized particles showed good dispersibility in water, were easily taken up by cells, and were not cytotoxic.
CHEMISTRY-SWITZERLAND
(2023)
Article
Physics, Applied
Zeming Sun, Zhaslan Baraissov, Ryan D. Porter, Liana Shpani, Yu-Tsun Shao, Thomas Oseroff, Michael O. Thompson, David A. Muller, Matthias U. Liepe
Summary: We demonstrate a seed-free electrochemical synthesis of Nb3Sn superconductors, which pushes the limits of their chemical and physical properties. The synthesized Nb3Sn exhibits reduced surface roughness, improved stoichiometry, and minimized impurity concentrations compared to conventional methods. The application of this Nb3Sn in large-scale 1.3 GHz SRF cavities shows the potential for high efficiency and high fields.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Nikita Luginin, Anna Eroshenko, Margarita Khimich, Konstantin Prosolov, Alexander Kashin, Pavel Uvarkin, Alexey Tolmachev, Ivan Glukhov, Alexander Panfilov, Yurii Sharkeev
Summary: In this study, we have developed a novel magnesium-based alloy with low cerium content and refined microstructure, which exhibits improved mechanical properties and corrosion resistance. This alloy shows potential for medical applications, addressing the limitations of traditional magnesium-based alloys.
Article
Nanoscience & Nanotechnology
Zeming Sun, Darrah K. Dare, Zhaslan Baraissov, David A. Muller, Michael O. Thompson, Matthias U. Liepe
Summary: It has been believed that intermetallic Nb3Sn alloys form through Sn diffusion into Nb. However, our findings of significant oxygen content in Nb3Sn led us to investigate alternative formation mechanisms. Through experiments with different oxide interfaces, we have demonstrated a thermodynamic route that challenges the conventional Sn diffusion mechanism and highlights the involvement of a SnOx intermediate phase. This new mechanism provides principles for growth optimization and synthesis of high-quality Nb3Sn superconductors.
Article
Materials Science, Multidisciplinary
Konstantin Prosolov, Vladimir Lastovka, Margarita Khimich, Ivan Glukhov, Alexander Kashin, Nikita Luginin, Yurii Sharkeev
Summary: This research investigates the incorporation of copper (Cu) into hydroxyapatite (CaP) materials and its impact on structural, mechanical, and electrochemical properties. The study observes significant changes in lattice parameters, elemental composition, and Ca/P ratio with the addition of CuO. The research also demonstrates improved hardness and corrosion resistance in the CaP coatings, suggesting potential advancements in biomedical applications.
Article
Engineering, Multidisciplinary
Alexander D. Kashin, Mariya B. Sedelnikova, Pavel V. Uvarkin, Anna V. Ugodchikova, Nikita A. Luginin, Yurii P. Sharkeev, Margarita A. Khimich, Olga V. Bakina
Summary: The micro-arc oxidation method was used to synthesize a biocompatible coating for a bioresorbable orthopedic Mg implant. The study focused on functionalizing the diatomite-based micro-arc coatings by incorporating TiO2 particles. Various properties of the coatings were examined and evaluated. The results showed the formation of a new magnesium orthosilicate phase, reduced corrosion current density, increased adhesion strength, and reduced cytotoxicity.
Article
Materials Science, Multidisciplinary
Valentina Chebodaeva, Mariya Sedelnikova, Margarita Khimich, Olga Bakina, Alexey Tolmachev, Andrey Miller, Kirill Golohvast, Aleksander Zakharenko, Vladimir Egorkin, Igor Vyaliy, Yurii Sharkeev
Summary: Porous calcium phosphate coatings with ZnO nanoparticles were prepared using the micro-arc oxidation method on a titanium substrate. The coatings showed improved physical, electrochemical, and electrical properties after modification with ZnO nanoparticles. Additionally, the antibacterial activity of the coatings increased by 99% after the addition of ZnO nanoparticles.