Article
Nanoscience & Nanotechnology
S. Raynova, F. Yang, L. Bolzoni
Summary: In this study, induction sintering is demonstrated as a promising alternative for more efficiently consolidating powder metallurgy Ti alloys, achieving high relative density and chemical homogeneity. Compared to vacuum sintered materials, induction sintered alloys have slightly lower relative density, finer microfeatures, lower oxygen content and comparable tensile behavior, making them suitable for structural engineering products manufactured at lower cost. Low-cost Fe-bearing powder metallurgy Ti alloys can have comparable properties to wrought-equivalent alloys with cost reduction achieved by reducing the intrinsic cost of the material.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(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
Materials Science, Multidisciplinary
Lipeng Gao, Guirong Li, Hongming Wang, Yuwei Yan
Summary: In this study, FeCoNi1.5CrCu/Al composites with excellent mechanical properties were successfully prepared using microwave sintering technology. It was found that the material maintained a fine and uniform microstructure during microwave heating. The mechanism of interface formation revealed the presence of an atomic diffusion layer with a BCC solid solution structure between the high entropy alloy particles and the matrix, which significantly enhanced the interfacial bonding performance.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
M. Paul, Y. Alshammari, F. Yang, L. Bolzoni
Summary: This study investigates the processing and properties of Ti-Cu-Nb alloys obtained via powder metallurgy. The studied alloys have a lamellar microstructure, which is refined by the incremental addition of Cu+Nb and a eutectoid substructure is formed for sufficiently high contents of Cu. The resistance to plastic deformation increases monotonically due to the microstructural changes, while the ductility initially increases for small additions of Cu+Nb and subsequently decreases due to the impact of the residual pores.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jiri Kozlik, Dalibor Preisler, Michaela Haasova, Josef Strasky, Tomas Chraska, Milos Janecek
Summary: The field-assisted sintering technique (FAST) was used to successfully sinter, homogenize, and age the Ti-5Al-5V-5Mo-3Cr (Ti-5553) aerospace alloy. High temperature sintering at 1500 degrees C ensured chemical homogeneity and subsequent annealing treatment at 600 degrees C produced the desired microstructure. The FAST process achieved comparable mechanical properties to conventionally processed Ti-5553 alloy.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Microscopy
Prakash Mohan, Dipen Kumar Rajak, Catalin Pruncu, Ajit Behera, Vicente Amigo-Borras, Abou Bakr Elshalakany
Summary: This study investigated the improvement of mechanical properties for titanium-based alloy by adding molybdenum. The research indicated that the percentage of beta-phase greatly affects the mechanical properties of the specimens, and the influence of molybdenum content on the microstructure variation in Ti-Mo and Ti-Zr-Mo alloys.
Article
Chemistry, Physical
Jiri Kozlik, Dalibor Preisler, Josef Strasky, Tereza Kosutova, Cinthia Antunes Correa, Jozef Vesely, Lucie Bodnarova, Frantisek Lukac, Tomas Chraska, Milos Janecek
Summary: Biomedical Ti-xNb-7Zr-0.7O alloys were manufactured using the field assisted sintering technique (FAST), with controlled oxygen content. The presence of oxygen prevented the formation of the alpha martensite phase and increased the elastic modulus and microhardness. The single phase beta Ti-29Nb-7Zr-0.7O alloy, with its low elastic modulus, is proposed for biomedical use.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Kenneth H. Eckelmeyer, A. D. Romig, Gerard M. Ludtka, Gail Mackiewicz-Ludtka, Lloyd R. Chapman
Summary: The effect of Ti content on age hardening and resulting mechanical properties is investigated in gamma-quenched U-Ti alloys. The study reveals that Ti content and initial microstructure determine the mechanisms of age hardening and the activation energy. Alloys with 0.6-1.0%Ti exhibit the best combination of strength and ductility. Alloys with high Ti content can achieve higher strength but are limited by the quench rate.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jia-Qi Zhang, Shuang Cao, Ying Liu, Mian-Mian Bao, Jing Ren, Sheng-Yi Li, Er-Lin Zhang, Jian-Jie Wang
Summary: Ti-Cu alloys exhibit strong antibacterial properties, high strength, and excellent corrosion resistance, making them suitable for orthopedic and dental implants. This study investigated the tribocorrosion behaviors of Ti-Cu alloys in simulated biological environments and compared them with cp-Ti. The results showed that Ti-Cu alloys had better corrosion resistance and wear resistance, making them potentially valuable for applications requiring wear and corrosion resistance.
Article
Biochemistry & Molecular Biology
Khashayar Khanlari, Qi Shi, Kefeng Li, Ke Hu, Chong Tan, Wen Zhang, Peng Cao, Ines Esma Achouri, Xin Liu
Summary: Compared to equiatomic or near-equiatomic NiTinol alloys, Ni-rich NiTi alloys are more suitable for structural applications. This research employed laser powder bed fusion to process two different grades of Ni-rich NiTi alloys, 58NiTi and 60NiTi, with varying Ni content. The microstructural study revealed inhomogeneity, cracks, and pores in the printed parts, which were partially eliminated by postprinting hot isostatic pressing. However, complete removal of these flaws was not achieved.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Kai Yao, Shewei Xin, Yi Yang, Yu Du, Jincai Dai, Ting Li, Xiaohua Min
Summary: The tensile behavior of metastable beta-type Ti-15Mo alloy with {332}<113> twinning-induced plasticity (TWIP) effect was investigated at 20K. It was found that the alloy exhibited ultrahigh strength and excellent elongation, making it a major advancement for cryogenic applications. The serrated tensile curve and multiple necking observed were attributed to the formation of twins. The presence of abundant {332}<113> twins and piled-up dislocations at twin boundaries hindered local plastic deformation and necking, resulting in simultaneous enhancement of strength and ductility. Exploiting the {332}<113> TWIP effect in body-centered cubic (BCC) structured titanium alloys is a novel strategy for cryogenic alloy development.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
L. Bolzoni, F. Yang, M. Paul
Summary: In this study, the addition of cheap alloying elements (Cu and Fe) in Ti alloys was analyzed to produce low-cost ternary Ti-Cu-Fe alloys using powder metallurgy. The results showed that the compressibility of the powder blends decreased with the increase of alloying elements, but similar relative density values could still be achieved. The addition of Cu and Fe resulted in the formation of alloys with a lamellar microstructure, and the specific chemistry of the alloy determined the features of the microstructure and the deformation and failure mechanisms of the sintered ternary Ti-xCu-xFe alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
A. Duchaussoy, M. Marteleur, P. J. Jacques, L. Choisez
Summary: This study conducts a comprehensive investigation into the mechanical properties of two beta metastable titanium alloys processed by laser powder bed fusion. It focuses on the influence of chemical homogenization and defects formation on processing parameters. The study reveals that the TRIP/TWIP mechanisms can improve the mechanical properties in the case of laser powder bed fusion.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Y. Alshammari, Y. Alkindi, B. Manogar, F. Yang, L. Bolzoni
Summary: This study investigates the effects of lean additions of zirconium on the microstructure and properties of powder metallurgy Ti-Zr alloys. It is found that incremental addition of zirconium enhances the densification and hardness, but decreases the ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
E. Panina, N. Yurchenko, S. Zherebtsov, N. Stepanov
Summary: The response of Ti40Nb30Hf15Al15 and Ti40Nb30Zr20Al10 refractory high entropy alloys to annealing was investigated in this study. Different grain sizes and phase compositions were observed after cold rolling and annealing at different temperatures, leading to varying degrees of hardness changes in the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Cun Liang, Mingxing Ma, Mingtu Jia, Stiliana Raynova, Jianqiang Yan, Deliang Zhang
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2015)
Article
Metallurgy & Metallurgical Engineering
J. Lou, B. Gabbitas, S. Raynova, F. Yang
Article
Chemistry, Physical
Jia Lou, Brian Gabbitas, Fei Yang, Stella Raynova, Huiyang Lu
JOURNAL OF ALLOYS AND COMPOUNDS
(2016)
Article
Materials Science, Multidisciplinary
Fei Yang, Stella Raynova, Ajit Singh, Qinyang Zhao, Carlos Romero, Leandro Bolzoni
Article
Materials Science, Multidisciplinary
Fei Yang, Brian Gabbitas, Martin Dore, Audrey Ogereau, Stiliana Raynova, Leandro Bolzoni
MATERIALS CHEMISTRY AND PHYSICS
(2018)
Article
Chemistry, Physical
Carlos Romero, Stella Raynova, Fei Yang, Leandro Bolzoni
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Materials Science, Multidisciplinary
Brian Gabbitas, Peng Cao, Stella Raynova, Deliang Zhang
JOURNAL OF MATERIALS SCIENCE
(2012)
Article
Nanoscience & Nanotechnology
C. Liang, M. X. Ma, M. T. Jia, S. Raynova, J. Q. Yan, D. L. Zhang
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2014)
Article
Materials Science, Multidisciplinary
F. Yang, Z. Q. Pi, Q. Y. Zhao, S. Raynova, Q. Liu, K. Sharp, M. Brandt, L. Bolzoni, M. Qian
Article
Engineering, Manufacturing
S. Raynova, M. A. Imam, F. Yang, L. Bolzoni
JOURNAL OF MANUFACTURING PROCESSES
(2019)
Article
Materials Science, Multidisciplinary
Stella Raynova, Yan Collas, Fei Yang, Leandro Bolzoni
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2019)
Proceedings Paper
Metallurgy & Metallurgical Engineering
G. Thavanayagam, D. L. Zhang, K. L. Pickering, S. Raynova
POWDER METALLURGY OF TITANIUM: POWDER PROCESSING, CONSOLIDATION AND METALLURGY OF TITANIUM
(2012)
Proceedings Paper
Metallurgy & Metallurgical Engineering
Stella Raynova, Deliang Zhang, Brian Gabbitas
POWDER METALLURGY OF TITANIUM: POWDER PROCESSING, CONSOLIDATION AND METALLURGY OF TITANIUM
(2012)
Proceedings Paper
Engineering, Mechanical
S. Raynova, D. L. Zhang, D. Polo, L. Gonthier, W. Egea, V. N. Nadakuduru
STRUCTURAL INTEGRITY AND FAILURE
(2011)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)