Article
Chemistry, Physical
M. Matsuda, K. Kiwaki, H. Akamine, M. Nishida
Summary: Microstructure and crystallography of martensite variants in Ti-Pd-Hf alloy were investigated using electron microscopy. The study found that the martensitic transformation temperature decreases with increasing Hf substitution in the Ti50-xPd50Hfx alloy. Martensitic transformation was not observed in the Ti25Pd50Hf25 and Ti10Pd50Hf40 alloys, but plate-like habit-plane variants consisting of major and minor correspondence variants were observed in the Ti40Pd50Hf10, Ti35Pd50Hf15, and Ti30Pd50Hf20 alloys. The martensitic transformation temperature in the Ti50-xPd50Hfx alloy was significantly decreased by nanosized H-phase particles and solute atom clustering.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Yuki Ikeda, Masahiko Nishijima, Takanori Kiguchi, Toyohiko J. Konno
Summary: The crystal structure of martensite in Cu-27at.%Zn-9.0 at.%Al alloy was studied using HAADF-STEM and GPA, revealing changes in atomic rearrangements during martensitic transformation. The coherent interface between the phases with a slight tilt in the basal plane was also observed.
Article
Materials Science, Multidisciplinary
Y. Chen, M. Klinger, J. Duchon, P. Sittner
Summary: The study investigates the stress deformation and high temperature heating process of NiTi shape memory wire through martensitic transformation at low temperature. It is found that plastic deformation involving dislocation slip and twinning triggers the metal structure transformation in martensite, and the impact on functionality in engineering applications is discussed.
Article
Nanoscience & Nanotechnology
Jin-Sung Hong, Young-Kook Lee
Summary: The mechanism of dislocation multiplication during thermally-induced gamma austenite <-> e martensite transformation in the Fe-17Mn alloy was investigated using an in-situ transmission electron microscope. Dislocations were introduced in gamma at grain boundaries and inside the grains during thermally - induced gamma <-> e transformations. These dislocations played different roles, including constituting e martensite and returning to grain boundaries during e -> gamma reverse transformation, as well as being introduced by plastic deformation during gamma <-> e transformations.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Jiaqi Dong, Tejas Umale, Benjamin Young, Ibrahim Karaman, Kelvin Y. Xie
Summary: We investigated the structure and substructure of a solution-treated high temperature shape memory alloy using transmission electron microscopy and precession electron diffraction. It was found that the martensite plates contained high-density internal compound twins. Four martensite variants were observed, and the orientation relationships were determined. Additionally, several low-angle grain boundaries were observed near the variant interfaces.
SCRIPTA MATERIALIA
(2022)
Article
Engineering, Multidisciplinary
Yang ShuiYuan, Hong Shen, Li MingPei, Qing XinYu, Guo LiPeng, Guo YiHui, Wang CuiPing, Liu XingJun
Summary: Two Cu-Al-Mn-Fe polycrystalline alloys were studied for their microstructure, reversible martensitic transformation, mechanical properties, and shape memory effects. The alloys exhibited suitable reversible martensitic transformation temperatures and the presence of two types of martensites. The FeAl nanoparticles were found to be Fe and Mn-rich, while the martensite was Cu-rich, where full shape recovery property was observed in one of the alloys under different deformations.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Chemistry, Physical
Nadine Eissmann, Uwe Muehle, Uwe Gaitzsch, Gunnar Walther, Thomas Weissgaerber, Bernd Kieback
Summary: The effect of titanium addition beyond the solubility limit was investigated to demonstrate the precipitation hardening possibility of the Cantor alloy CoCrFeMnNi. Following appropriate heat treatment, a significant increase in hardness was detected due to nanometer-sized precipitates identified through TEM analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Lunchao Zhang, Yuan Yuan, Jun Wang, Tao Chen, Jingfeng Wang, Fusheng Pan
Summary: High temperature heat treatment Mg-0.69Sn-0.69Y alloy exhibited a high damping capacity (0.201 at epsilon=1 x 10-3) and a very low critical strain amplitude at room temperature (epsilon cr1=2.97 x 10-5), which can be ascribed to the combined effects of purified matrix phase and subgrain interfaces. The substructure is unstable and the damping capacity decreases with temperature increment.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Aslan Ahadi, Amir Sabet Ghorabaei, Hassan Shirazi, Mahmoud Nili-Ahmadabadi
Summary: In this study, an unprecedented thermal stability is reported in bulk coarse-grained Ti54Ni3.7Cu123Co2 after aging at 600 degrees C for 1 h. A thermomechanical processing route is proposed to achieve a uniform nanocrystalline microstructure with embedded Ti2Cu precipitates, leading to improved superelastic cyclic stability.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Xianbing Zhang, Weilin Wang, Jialin Wu, Shubin Wang, Jian Sun, Jing Yang Chung, Stephen J. Pennycook
Summary: This study designs a Ti48.9Zr32.0Nb12.6Ta6.5 MEA exhibiting {112}<111>(beta) twins at room temperature. The solution-treated (ST) samples show homogeneous chemical composition, good tensile properties, and no athermal phase. Microscopy reveals the interaction between twins and dislocations in the deformation of MEAs, contributing to work hardening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
D. D. Kuznetsov, E. I. Kuznetsova, A. V. Mashirov, A. S. Loshachenko, D. V. Danilov, V. I. Mitsiuk, A. S. Kuznetsov, V. G. Shavrov, V. V. Koledov, P. Ari-Gur
Summary: The Ni46Mn41In13 (close to 2-1-1 system) Heusler alloy was investigated through magnetization measurement at varying temperatures and magnetic fields. The magnetocaloric effect was found to have a maximum increment T-ad of -4.2 K at a temperature of 212 K and a magnetic field of 10 T during the martensitic transformation. The alloy's structure was examined using transmission electron microscopy (TEM) and revealed concentration stratification occurring through spinodal decomposition into nanoscale regions, along with the presence of martensitic and austenitic phases depending on temperature and sample thickness.
Article
Nanoscience & Nanotechnology
Peng Chen, Yunfan Liu, Na Min, Meimei Wang, Xiaorong Cai, Mingjiang Jin, Xuejun Jin
Summary: In this study, an excellent two-way shape memory effect (TWSME) with large magnitude and small cyclic degradation of NiTi wires is achieved by combining martensite deformation and nanocrystallization. The wires exhibit a maximum TWSME strain of 7.37% after being pre-deformed to 11% and maintain a stable strain of 6.88% after 20 cycles. The excellent TWSME is attributed to the dislocation structures induced by martensite deformation and the nanocrystalline strengthened matrix.
SCRIPTA MATERIALIA
(2023)
Article
Automation & Control Systems
Xiaolong Liu, Hui Liu, Jindong Tan
Summary: This article presents a numerical model for predicting actuation frequencies of SMA actuators, taking into consideration factors such as heat convection methods, bias loads, and Joule heating. Experimental verification demonstrates differences between predicted and measured frequencies, highlighting the impact of different bias loads on actuation frequency accuracy.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2021)
Article
Materials Science, Multidisciplinary
Yan Liu, Jinshan Li, Bin Tang, Lin Song, William Yi Wang, Dong Liu, Rui Yang, Hongchao Kou
Summary: The decomposition mechanism of (alpha(2) /gamma) lamellae was investigated using transmission electron microscopy (TEM) and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) techniques. The results revealed the facilitated alpha(2)->ss phase transformation and the formation of ellipsoidal omega(o) particles. The mechanism of the lath-shaped omega(o) phase was attributed to both element segregation and strain accommodation caused by the ss o precipitate in alpha(2) lamellae. These findings provide insights into the decomposition mechanism of (alpha(2)/gamma) lamellae and have implications for controlling microstructures and improving the performance of ss-solidified gamma-TiAl alloys.
Article
Nanoscience & Nanotechnology
Baris Yavas, Cain J. Hung, Mingxuan Li, Rainer J. Hebert, S. Pamir Alpay, Mark Aindow
Summary: Laser glazing in a powder bed fusion instrument was used to evaluate the microstructure of an Al85Cu6Fe3Cr6 alloy, revealing the presence of I-phase quasicrystals, Al2Cu, and FCC Al. Laser tracks produced under different conditions showed a fine and uniform phase mixture with over 70% I-phase, a thin film of Al2Cu, and no cracking or macrosegregation. The reasons for the formation of I-phase instead of the previously reported D-phase in this alloy were discussed.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Gibin George, Jacob Hayes, Candyce N. Collins, Jason E. Davis, Lei Yu, Yulin Lin, Jianguo Wen, Daryush Ila, Zhiping Luo
Summary: This study investigates the photoluminescence and cathodoluminescence characteristics of rare-earth-doped CaF2 nanoparticles and their composite monoliths with epoxy. The results show that the luminescence intensity increases as the particle size decreases for single-doped particles, but decreases for codoped particles. Additionally, Eu2+- and Tb3+-codoped CaF2 nanoparticles exhibit red emission.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yali Zhang, Xiaosong Jiang, Hongliang Sun, Tingfeng Song, Defeng Mo, Xue Li, Zhiping Luo
Article
Polymer Science
Washat Ware, Tia Wright, Yimin Mao, Shubo Han, Jessa Guffie, Evgeny O. Danilov, Jeromy Rech, Wei You, Zhiping Luo, Bhoj Gautam
Summary: Research shows that tuning aggregation in polymer blends can optimize charge generation, which is beneficial for the design of highly efficient organic photovoltaic devices.
Review
Optics
Vineet Kumar, Zhiping Luo
Summary: This review article presents the recent advances in X-ray emission dynamics of inorganic scintillator materials, discussing the origin of scintillation and the factors influencing the decay process of different luminescence centers, focusing on the short-lived decay component. The study highlights three decay mechanisms in cross luminescence emission, exitonic emission, and dopant-activated emission.
Article
Chemistry, Physical
Sivasankara Rao Ede, Candyce N. Collins, Carlos D. Posada, Gibin George, Hui Wu, William D. Ratcliff, Yulin Lin, Jianguo Wen, Shubo Han, Zhiping Luo
Summary: The synthesis of SrCo-Fe-O oxides to enhance OER activity resulted in the discovery of Sr2Co1.5Fe0.5O6-delta as the best catalyst, demonstrating superior performance in water oxidation due to its unique intermediate structure and increased covalency of Co 3d and O 2p. This study highlights the importance of developing catalysts with specific structural features and chemical properties for improved hydrogen generation efficiency.
Article
Chemistry, Physical
Rui Shu, Xiaosong Jiang, Y. X. Zhang, Richard Wuhrer, Bing Liu, Hongliang Sun, Zhenyi Shao, Zhiping Luo
Summary: In this study, Mo-Cu-Zr ternary composites were reinforced with various types and contents of nano-carbon to find the optimal composition. The 0.8C + 0.2G-MCZ3 composite showed the best comprehensive properties, with a relative density, hardness and compressive strength of 99.7%, 343.6 HV and 953.5 MPa respectively. The synergetic effects and multiple strengthening mechanisms resulted in the improvement of the microstructure and properties of the composites.
Article
Nanoscience & Nanotechnology
Yuxiang Liu, Mingxiang Liu, Jianlei Zhang, Wei He, Zhiping Luo, Changjiang Song, Qijie Zhai
Summary: In this study, it was found that the addition of chromium had significant effects on the microstructure and mechanical properties of Fe-28Mn-9Al-1.2C alloy, with different chromium addition levels showing nonlinear impacts on yield strength and total elongation of the strips. Annealing treatment improved the yield strength of all strips, and the formation of Cr23C6 carbides at austenite grain boundaries could lower the ductility of the strips containing 9% chromium.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Zhiping Luo
Summary: This study used quantitative electron microscopy to investigate the crystalline structure of gamma-alumina and its transformation mechanism from boehmite, proposing a new tetragonal structure model and elucidating two transformation mechanisms. The experimental observations supported the reaction mechanism, which occurred through partial occupation of the dehydrated space by diffusion in the initial stage of the transformation.
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS
(2021)
Article
Chemistry, Physical
Mingxiang Liu, Zhiming Li, Zhiping Luo, Changjiang Song, Qijie Zhai
Summary: In an Fe-10Cr alloy, the critical cooling rate of martensitic transformation decreases by one order of magnitude when cooling from 1300 degrees C compared to cooling from 1000 degrees C. This decrease is attributed to the precursor delta ->gamma phase transition during cooling from 1300 degrees C significantly reducing the non-chemical driving force of martensitic transformation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Gibin George, Navadeep Shrivastava, Tamela L. Moore, Caressia S. Edwards, Yulin Lin, Jianguo Wen, Zhiping Luo
Summary: In this study, high-aspect-ratio AWO(4) (A = Ba, Ca, Pb and Sr) nanofibers doped with Tb and Eu ions were synthesized and their performance in UV light detection was compared. The CaWO4:5Tb-5Eu nanofibers exhibited strong photoluminescence and cathodoluminescence emissions, making them a potential fluorescent probe for UV wavelength detection. However, similar results were not observed in nanofibers of other AWO(4) compounds. Additionally, the CL intensities from CaWO4:5Tb-5Eu nanofibers showed highly linear dependences on applied voltage and current, suggesting their potential use in radiation detection.
Article
Materials Science, Multidisciplinary
Menuka Adhikari, Navadeep Shrivastava, Starfari T. McClain, Chandra M. Adhikari, Burak Guzelturk, Rabi Khanal, Bhoj Gautam, Zhiping Luo
Summary: The halide Cs2HfF6 (CHF) possesses higher mass density and chemical stability for radiation detection compared to halides Cs2HfX6. Luminescence properties and energy transfer mechanisms of rare-earth-doped CHF materials are studied. Codoped CHF material shows stable emission and higher sensitivity to radiation energy.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Girja Mani Aryal, Krishna Prasad Kandel, Ram Kumar Bhattarai, Basant Giri, Menuka Adhikari, Alisha Ware, Shubo Han, Gibin George, Zhiping Luo, Bhoj Raj Gautam, Bhanu Bhakta Neupane
Summary: In this study, multiple material properties of handmade Lokta paper from Nepal were measured and analyzed. The findings revealed that the papers are lightweight with intermediate to high strength, and the tensile strength is significantly higher along the length direction. Features of cellulose, hemicellulose, and lignin were observed in FTIR spectra, and crystalline and amorphous phases were identified in XRD data. Electron microscopy images showed a cross-linked network of fibers contributing to strength and durability.
Article
Materials Science, Multidisciplinary
Kasci D. Pelucarte, Tashi A. Hatchell, Gibin George, Sivasankara Rao Ede, Menuka Adhikari, Yulin Lin, Jianguo Wen, Zhiping Luo, Shubo Han
Summary: In this study, porous La-Sr-Co-Ni-O nanofibers with a perovskite structure were successfully prepared and utilized to develop a nonenzymatic electrochemical glucose biosensor. The biosensor exhibited high sensitivity and excellent stability towards glucose, while showing low interference response to other biomolecules. This research has great potential for practical applications in clinical testing.
MATERIALS ADVANCES
(2022)
Review
Chemistry, Physical
Sivasankara Rao Ede, Zhiping Luo
Summary: This review focuses on different doping strategies and associated OER mechanisms of state-of-the-art catalysts for improving the kinetics of the oxygen evolution reaction in electrochemical water splitting. Various doping methods have been proposed to enhance the efficiency of OER catalysts, with different materials types (oxides, non-oxides, and carbon-based catalysts) showing unique effects on the OER mechanism. Combined experimental and theoretical research provides guidelines for designing efficient catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Materials Science, Multidisciplinary
Vineet Kumar, Gibin George, Jacob Hayes, Yulin Lin, Burak Guzelturk, Jianguo Wen, Zhiping Luo
Summary: The study successfully synthesized cube-shaped nanocrystals doped with rare-earth ions via a hydrothermal method. The dopants on two different Ba2+ sites in the host lattice exhibited site-dependent luminescence characteristics. In the codoped sample, Eu3+ and Tb3+ were observed to preferably occupy two different sites in the host lattice.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.
