Article
Chemistry, Physical
L. Bolzoni, J. Hu, F. Yang, M. Zhang, J. Li, Z. Lu
Summary: The aim of this study was to investigate the kinetics of oxidation in Fe-bearing titanium alloys and to explore the mechanism of oxidation. The results revealed that the oxidation process was mainly controlled by the diffusion of oxygen and titanium. The formation of a non-uniform oxidation layer was observed, which is significant for understanding the oxidation behavior of Fe-bearing titanium alloys and predicting the degree of oxidation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
B. Manogar, F. Yang, L. Bolzoni
Summary: The individual addition of Nb, Fe, or Mn to Ti has been extensively studied, but the combined addition of these elements, especially in the Ti-Nb-Mn system, has not been well understood. This study investigated the microstructure and tensile properties of Ti-6Nb-x(Fe or Mn) alloys produced using powder metallurgy. It was found that Mn is a stronger eutectoid beta stabiliser than Fe, resulting in refined lamellar structures and a greater amount of stabilised beta phase. Therefore, higher tensile properties and lower ductility were achieved in ternary Ti-Nb-Mn alloys compared to Ti-Nb-Fe alloys, depending on the volumetric fraction of residual porosity and microstructural changes induced by chemical composition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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
Engineering, Chemical
L. Bolzoni, S. Raynova, F. Yang
Summary: This study presents a new alternative method for manufacturing Ti alloys from particulate materials, demonstrating that the proposed manufacturing route can produce structurally sound Ti alloys in a shorter production process. The relative density and mechanical properties of the alloy are found to increase with the sintering temperature, with the ultimate tensile strength reaching 850 MPa.
Article
Materials Science, Multidisciplinary
Balakrishnan Manogar, Fei Yang, Leandro Bolzoni
Summary: Ti-5Fe-xNb alloys were produced via powder metallurgy to investigate the relationship between mechanical behavior and microstructural changes caused by the addition of Nb. The results showed that increasing Nb content led to a decrease in alloy densification, but an increase in the volume fraction of the stabilized beta phase. The alloys exhibited finer microstructures and higher mechanical properties with increasing Nb content, but lower elongation to fracture.
Article
Chemistry, Physical
Yuchao Song, Fucheng Qiu, Dmytro Savvakin, Xiaofeng Xu, Oleksandr Stasiuk, Orest Ivasishin, Tuo Cheng
Summary: In this study, highly dense in situ reinforced Ti6Al4V/TiB composites were successfully manufactured using a hydrogen-assisted blended elemental powder metallurgy approach. By optimizing the processing parameters, composites with stable microstructures and excellent mechanical properties were obtained.
Article
Materials Science, Multidisciplinary
Huicong Li, Qi Cai, Shukui Li, Hanqing Xu
Summary: Through the preparation and investigation of the alloys, it was found that Ti-Nb-Mo-Ta alloys possess excellent mechanical properties, with the second-phase strengthening being the dominant mechanism for improving the mechanical properties of the alloys, which is of great significance for the preparation and application of the alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Yu Pan, Yucheng Yang, Qingjun Zhou, Xuanhui Qu, Peng Cao, Xin Lu
Summary: By adding a minor CaC2 oxygen-scavenger, the excessive interstitial oxygen contamination in titanium and its alloys can be effectively solved, resulting in high strength and superior ductility. This novel method offers a cost-effective way to develop high-performance titanium materials.
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
Chemistry, Physical
Qizhou Cai, Can Xu, Xu Chen, Weiguo Xi, Jingfan Cheng, Zhe Chen, Ji Chen
Summary: In this study, Mn and Mo alloyed titanium alloys were prepared using mechanical alloying and spark plasma sintering. The microstructure and electrical resistivity of Ti-Al-Mn alloys were investigated. The addition of Mo improved the microstructure and electrical resistivity of the Ti-Al-Mn-Mo alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Chemistry, Physical
Zhi Wang, Yaning Tan, Ning Li
Summary: This paper presents an overview of powder metallurgy (PM) titanium alloys, highlighting their advantages in terms of low cost, near-net-shape formability, and competitive mechanical properties compared with wrought titanium alloys. The state-of-the-art research on PM titanium alloys is discussed, including the basic fabricating processes, typical microstructure, and advanced mechanical properties. The selection criteria for the appropriate PM process for manufacturing specific components with defined material properties are also addressed. Furthermore, open and critical issues in the field of PM titanium alloy that require further research are identified.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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
Khrystyna Shliakhetka, Iryna Pohrelyuk, Halyna Chumalo, Roman Proskurnyak, Serhii Lavrys, Halyna Veselivska
Summary: This study compared the corrosion behavior of porous and non-porous titanium in acidic solutions and found that porous titanium exhibited worse electrochemical performance and corrosion rate due to the presence of pores. The corrosion mechanisms and their differences were established through microstructural analysis. The results provide valuable reference data for designing and manufacturing products in industries such as chemical and metallurgy.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Manufacturing
Vahid Fartashvand, Rezvan Abedini, Amir Abdullah
Summary: This study investigates the influence of longitudinal ultrasonic vibration on the physical/mechanical properties of sintered titanium powder samples. The results show that the application of ultrasonic vibration improves the density of fine powder sintered samples, although their compacted density is still lower than that of coarse powder samples. Additionally, coarse powder samples exhibit better dimensional stability than fine powder samples, with a decrease in shrinkage of up to 12%. The compression strength is also improved by 64% due to the application of ultrasonic vibration.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2022)
Article
Metallurgy & Metallurgical Engineering
Ilven Mutlu
Summary: A precipitation hardenable metastable-beta type Ti-Nb-Cu alloy was produced using powder metallurgy, and sinter-aging process was implemented to enhance the mechanical properties in a cost-effective manner. The effects of process parameters on mechanical properties were investigated, showing that increasing sintering temperature, cooling rate, and aging temperature can improve Young's modulus and strength values. The addition of Cu content influenced corrosion potential and current density, while metal release values remained within safe levels.
Article
Metallurgy & Metallurgical Engineering
M. P. Brady, G. Muralidharan, Y. Yamamoto, B. A. Pint
OXIDATION OF METALS
(2017)
Article
Materials Science, Multidisciplinary
Kevin G. Field, Samuel A. Briggs, Xunxiang Hu, Yukinori Yamamoto, Richard H. Howard, Kumar Sridharan
JOURNAL OF NUCLEAR MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
Kevin G. Field, Samuel A. Briggs, Kumar Sridharan, Yukinori Yamamoto, Richard H. Howard
JOURNAL OF NUCLEAR MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
Kevin G. Field, Samuel A. Briggs, Kumar Sridharan, Richard H. Howard, Yukinori Yamamoto
JOURNAL OF NUCLEAR MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
T. Koyanagi, Y. Katoh, J. O. Kiggans, T. Hinoki, H. E. Khalifa, C. P. Deck, C. A. Back
JOURNAL OF NUCLEAR MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
Zhiqian Sun, Hongbin Bei, Yukinori Yamamoto
MATERIALS CHARACTERIZATION
(2017)
Article
Materials Science, Ceramics
Jacob W. McMurray, Jim O. Kiggans, Grant W. Helmreich, Kurt A. Terrani
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2018)
Article
Nuclear Science & Technology
Xiang Chen, Arunodaya Bhattacharya, Mikhail A. Sokolov, Logan N. Glowers, Yukinori Yamamoto, Tim Graening, Kory D. Linton, Yutai Katoh, Michael Rieth
FUSION ENGINEERING AND DESIGN
(2019)
Article
Nuclear Science & Technology
Adrian S. Sabau, Kazutoshi Tokunaga, Michael G. Littleton, James O. Kiggans, Charles R. Schaich, Ralph B. Dinwiddie, Daniel T. Moore, Yoshio Ueda, Yutai Katoh
FUSION SCIENCE AND TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
S. C. Finkeldei, J. O. Kiggans, R. D. Hunt, A. T. Nelson, K. A. Terrani
JOURNAL OF NUCLEAR MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Corson L. Cramer, Amy M. Elliott, James O. Kiggans, Bianca Haberl, David C. Anderson
MATERIALS & DESIGN
(2019)
Article
Materials Science, Multidisciplinary
Yukinori Yamamoto, Michael P. Brady, Qing-Qiang Ren, Jonathan D. Poplawsky, David T. Hoelzer, Michael J. Lance
Summary: This study investigates the creep-rupture behavior and microstructural response of alumina-forming austenitic alloys with different precipitation strengthening mechanisms. The results provide important insights for guiding and verifying computational alloy design and life-prediction modeling.
Article
Materials Science, Multidisciplinary
Yukinori Yamamoto, Qing-Qiang Ren, Michael P. Brady
Summary: This study evaluates the creep-rupture properties and oxidation behavior of alumina-forming austenitic (AFA) alloys under high-temperature and corrosive environments. By modifying the composition of the alloys, the study aims to optimize their performance. The results show that increasing the Cr content decreases the creep-rupture life and affects the oxidation resistance of the alloys.
Article
Nuclear Science & Technology
A. F. Rowcliffe, C. E. Kessel, Y. Katoh, L. M. Garrison, L. Tan, Y. Yamamoto, F. W. Wiffen
NUCLEAR MATERIALS AND ENERGY
(2018)
Article
Nuclear Science & Technology
K. Ibano, A. S. Sabau, K. Tokunaga, M. Akiyoshi, J. O. Kiggans, C. R. Schaich, Y. Katoh, Y. Ueda
NUCLEAR MATERIALS AND ENERGY
(2018)
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)