Article
Engineering, Electrical & Electronic
Ganesh Shridhar Hegde, A. N. Prabhu, Suchitra Putran, Ashok Rao, K. Gurukrishna, U. Deepika Shanubhogue
Summary: Composite polycrystalline samples of (Bi0.98In0.02)(2)Te2.7Se0.3/x%Bi2Se3 were prepared using the solid-state reaction approach, with varying amounts of Bi2Se3 (x = 5%, 10%, 15%, and 20%). The composite displayed a hexagonal crystal structure (space group: R3m) according to x-ray diffraction analysis. Scanning electron microscopy revealed the presence of secondary particles on the sample surface. All samples exhibited typical semiconductor behavior across the entire temperature range. In the (Bi0.98In0.02)(2)Te2.7Se0.3 complex, bismuth was found to coordinate with six selenium atoms and there were significant selenium vacancies. Increased concentration of bismuth selenide led to a shift from a dissolution pattern to a substitutional pattern. The (Bi0.98In0.02)(2)Te2.7Se0.3/20%Bi2Se3 composition showed a two-fold decrease in electrical resistivity compared to (Bi0.98In0.02)(2)Te2.7Se0.3/5%Bi2Se3. Sintering and scattering of potential barrier resulted in the formation of granular material and increased Seebeck coefficient. A 200% increase in thermopower was observed for (Bi0.98In0.02)(2)Te2.7Se0.3/20%Bi2Se3 compared to (Bi0.98In0.02)(2)Te2.7Se0.3/5%Bi2Se3 compound.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Applied
Yanqiu Ma, Jingnan Zang, Mingmin Qing, Yulin Xiao, Huajiang Zhang, Yujie Chi, Yuan Chi
Summary: The glycosylation of egg white proteins with maltodextrin was studied. The glycosylated egg white proteins showed improved gel properties, such as increased hardness, water holding capacity, rheological parameters, and finer gel microstructures. The protein structures were unfolded due to glycosylation, as observed by changes in content of exposed sulfhydryl group and β-sheet, decreased crystallinity, thermal denaturation temperature, and enthalpy. The study provides insights into glycosylation mechanism and a convenient approach to improve the gel properties of egg white proteins.
Article
Chemistry, Applied
Yanqiu Ma, Jingnan Zang, Mingmin Qing, Yulin Xiao, Huajiang Zhang, Yujie Chi, Yuan Chi
Summary: The glycosylation of egg white proteins with maltodextrin was studied and the resulting glycosylated proteins showed improved gel properties such as increased hardness, water holding capacity, rheological parameters, and finer microstructures. The protein structures were unfolded due to extended glycosylation, as evidenced by increased exposed sulfhydryl groups and beta-sheet content, decreased crystallinity, thermal denaturation temperature, and enthalpy. The gel properties were correlated with the structural changes. Overall, this study provides insights into the mechanism of glycosylation and offers a convenient approach to enhance the gel properties of egg white proteins in the food industry.
Article
Materials Science, Multidisciplinary
Arslan Ashfaq, Rasmiah S. Almufarij, Islam Ragab, Yasir Ali, Lamiaa G. Alharbe, Elsammani Ali Shokralla, S. M. Alghamdi, Emaan Alsubhe, Ohood Albeydani, Romulo R. Macadangdang Jr, Adnan Ali
Summary: The thermoelectric material BiAgSe2 is a strong candidate for energy conversion due to its low thermal conductivity. Through phase transition, grain refinement, and post-selenization treatment, the material's Seebeck coefficient and electrical conductivity can be improved, enhancing its thermoelectric performance.
Article
Chemistry, Physical
Maxim Ozerov, Vitaly Sokolovsky, Sergey Nadezhdin, Ekaterina Zubareva, Nadezhda Zherebtsova, Nikita Stepanov, Lujun Huang, Sergey Zherebtsov
Summary: The TiZrNb metal-matrix composites reinforced by in-situ formed borides were produced using different amounts of TiB2. The composites exhibited varying microstructures and mechanical properties with the increase in boride content. Load transfer strengthening was found to be the main contributor to the overall strength of the composite. The biocompatibility evaluation suggested a decrease in the proliferation rate of mesenchymal stem cells with an increase in boride content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Iztok Naglic, Blaz Leskovar, Zoran Samardzija, Bostjan Markoli
Summary: This study investigated the influence of gallium addition on the phases formed in Al-Mn alloys during casting, revealing that an increase in gallium content led to the formation of IQCs and DQCs in the alloys. Microanalysis showed that IQCs contained more gallium and less manganese compared to DQCs.
Article
Materials Science, Ceramics
Katharina Kruppa, Itzhak I. Maor, Frank Steinbach, Vadim Beilin, Meirav Mann-Lahav, Mario Wolf, Gideon S. Grader, Armin Feldhoff
Summary: Oxide-based ceramics offer promising thermoelectric materials for recycling high-temperature waste heat. In this study, electrospun nanofibers of calcium cobaltite were compacted to improve the functional performance of the material and achieve thermal stability.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Sanyukta Ghosh, Umasankar Rout, Krushna Kumari Raut, Anirudha Karati, Gerda Rogl, Peter Franz Rogl, Ernst Bauer, B. S. Murty, Ramesh Chandra Mallik
Summary: Filling the voids of a skutterudite material with suitable electropositive elements can greatly affect the power factor by altering carrier concentration. Doping and filling can further enhance the thermoelectric properties. Electropositive n-type fillers have been successfully used in Co4Sb12. In this study, Fe was substituted as a p-type dopant in S0.15Co4Sb12, resulting in the highest zT value.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Masaki Tahara, Kazuya Hasunuma, Hideki Hosoda
Summary: This study investigated the decomposition process of the isothermal alpha '' phase in beta-Ti alloys, and found that the resulting alpha + beta dual phase inherited the microstructural characteristics of the alpha ''(iso) phase. The research results indicate the existence of a strict variant selection rule between the decomposed alpha and beta phases, with a specific variant combination observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Mali Zhao, Dohyun Kim, Young Hee Lee, Heejun Yang, Suyeon Cho
Summary: This paper introduces critical advances in the field of quantum sensing of thermopower, ranging from atomic to several-hundred-nanometer scales, and discusses the roles of low-dimensionality, defects, spins, and relativistic effects in optimized power generation. Investigating the microscopic nature of thermopower in quantum materials can provide insights for the design of advanced materials for future thermoelectric applications, while quantum sensing techniques for thermopower can pave the way for practical and novel energy devices towards a sustainable society.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Applied
Indira Govindaraju, Guan-Yu Zhuo, Ishita Chakraborty, Sindhoora Kaniyala Melanthota, Sib Sankar Mal, Bhaswati Sarmah, Vishwa Jyoti Baruah, Krishna Kishore Mahato, Nirmal Mazumder
Summary: This study investigated the structural and functional characteristics of starch from ten indigenous rice varieties in Northeast India, showing variations in physicochemical properties and hydrolysis rates. Results revealed changes in starch granule shape during enzymatic hydrolysis and differences in starch crystallinity. Additionally, the research identified amylose hydrolysis and disturbances in the ordered arrangement in the crystalline part in hydrolyzed starch granules.
FOOD HYDROCOLLOIDS
(2022)
Article
Chemistry, Multidisciplinary
Natalia Morozova, Igor Korobeynikov, Nobuyoshi Miyajima, Sergey Ovsyannikov
Summary: Manipulating stress can greatly enhance the thermoelectric power factor and narrow the band gap of layered SnSe single crystals, offering a novel approach to improve the performance of thermoelectric materials.
Article
Chemistry, Physical
Zeenat Jabeen, Asadullah Dawood, Muneerah Alomar, Salman Naeem Khan, Ihsan Ali, Muhammad Asif, Waseem Abbas, Muhammad Sultan Irshad, Mukhtar Ahmad
Summary: A series of single-phase nickel-substituted magnesium spinel ferrites were synthesized using the hydrothermal technique, and their morphology, structure, magnetism, and electrochemical properties were investigated. Experimental characterization techniques confirmed the presence of a single-phase spinel structure, with a decrease in lattice parameter and clustering of nanoparticles as nickel concentration increased. Raman and FTIR spectra indicated changes in wave numbers and the shortening of Fe-O bonds. Additionally, the ferrites exhibited increased saturation magnetization, decreased coercivity, decreased specific capacitance, and increased loop size. These ferrites are promising for energy storage applications.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Takashi Takeda, Kousuke Kato, Hajime Kiyono, Naoto Hirosaki
Summary: In this study, single phase powders of green emitting Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor were successfully prepared by controlling starting compositions, annealing conditions, and reaction vessels. The emission peak shifted depending on the Eu concentration, with the highest intensity observed at 3 at%. The phosphor exhibited a small thermal quenching of luminescence intensity and showed a high internal quantum efficiency of 93% when washed with hydrochloric acid solution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
V. V. Romaka, L. Romaka, A. Horyn, Yu Stadnyk
Summary: The interaction of Yttrium and Thulium with Nickel and Antimony was studied at 870 K in the whole concentration range, resulting in the formation of several ternary compounds. The electrical resistivity and Seebeck coefficient of the YNiSb and TmNiSb half-Heusler compounds were measured and calculated, showing their behavior as doped and compensated semiconductors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Anirudha Karati, Sanyukta Ghosh, Ramesh Chandra Mallik, Rajashekhara Shabadi, B. S. Murty, U. V. Varadaraju
Summary: In this study, Sn-doped TiFe0.5Ni0.5Sb1-xSnx alloys were synthesized using vacuum arc melting and ball milling, followed by spark plasma sintering to reduce the size of secondary phases in the microstructure. The undoped sample showed a ZT value of 0.008 at 873K for both 1h and 5h BM-SPS samples.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Physics, Applied
Raju Chetty, Priyanka Jood, Masayuki Murata, Koichiro Suekuni, Michihiro Ohta
Summary: This study demonstrates the thermoelectric power generation capability of a prototype pi-shaped module composed of p-type colusite and n-type nanostructured PbTe, and evaluates the thermoelectric performance of the materials. The optimal working temperature and thermoelectric conversion efficiency for Cu26Cr2Ge6S32 and Pb0.98Ga0.02Te-3% GeTe are determined.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Sung-Gyu Kwak, Il-Ho Kim
Summary: The thermoelectric properties of off-stoichiometric tetrahedrite Cu12+mSb4S13 were investigated, and it was found that Cu deficiency improved electrical transport but had a negative effect on thermal transport, while Cu excess reduced thermal conductivity.
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Go-Eun Lee, Il-Ho Kim
Summary: In this study, solid solutions of Cu3SbS4-ySey were synthesized using MA and HP. It was found that the increase in Se content led to higher carrier concentration and mobility, while the Seebeck coefficient decreased. The power factor of the solid solutions did not improve compared with the end compounds. The solid solutions showed lower lattice thermal conductivities with increasing Se content.
KOREAN JOURNAL OF METALS AND MATERIALS
(2022)
Article
Chemistry, Physical
Anirudha Karati, Sanyukta Ghosh, M. Nagini, Ramesh Chandra Mallik, Rajashekhara Shabadi, B. S. Murty, U. V. Varadaraju
Summary: In this study, nanocrystalline Ti2NiCoSn1-xSb1+x(x = 0.3, 0.5, 0.7, 1) alloys were successfully synthesized using the powder metallurgy route. The homogeneous distribution of elements in the half-Heusler phase at a scale of few nanometers was confirmed by atom probe analysis. A combination of nanostructuring, lattice distortion, and interfacial scattering resulted in a reduction in thermal conductivity and an improvement in thermoelectric efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Anirudha Karati, Soumya Ranjan Mishra, Sanyukta Ghosh, Ramesh Chandra Mallik, Rajashekhara Shabadi, R. V. Ramanujan, Satyesh Kumar Yadav, B. S. Murty, U. V. Varadaraju
Summary: A new type of high entropy alloy Ti2NiCoSnSb with half-Heusler structure has been synthesized for the first time. It was found that the desired single-phase HH material can be obtained through dry milling, which exhibited simultaneous enhancement in the Seebeck coefficient and electrical conductivity. Moreover, the band structure calculated by density functional theory was in good agreement with the experimental results, and phase separation strongly influenced the thermoelectric properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Sanyukta Ghosh, Umasankar Rout, Krushna Kumari Raut, Anirudha Karati, Gerda Rogl, Peter Franz Rogl, Ernst Bauer, B. S. Murty, Ramesh Chandra Mallik
Summary: Filling the voids of a skutterudite material with suitable electropositive elements can greatly affect the power factor by altering carrier concentration. Doping and filling can further enhance the thermoelectric properties. Electropositive n-type fillers have been successfully used in Co4Sb12. In this study, Fe was substituted as a p-type dopant in S0.15Co4Sb12, resulting in the highest zT value.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Physics, Applied
D. Sreeshma, Amardeep Jagtap, Janani Balakrishnan, Ramesh Chandra Mallik, K. S. R. Koteswara Rao
Summary: This study analyzed defects in HgTe nanocrystals using thermal admittance spectroscopy and investigated their impact on transport properties. It was found that the trap activation energy obtained from low-temperature I-V measurements was 0.14 eV, and transport mainly occurred through these trap states. The study shed light on the importance of understanding and quantifying electrically active defects in HgTe nanocrystals for the advancement of NC-based optoelectronic devices.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Multidisciplinary
Sang Jun Park, Il-Ho Kim
Summary: In this study, Sn and Se-doped famatinite materials were synthesized and their electrical and thermoelectric properties were evaluated. Double doping with Sn and Se increased the electrical conductivity, power factor, and thermoelectric figure of merit ZT of the materials. The optimized material showed a 4.8-fold enhancement in thermoelectric performance compared to undoped famatinite.
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2023)
Review
Materials Science, Multidisciplinary
Ramarajan Ramanathan, Ramesh Chandra Mallik, Michael Zinigrad
Summary: Perovskites have shown revolutionary impact on device performance in solar-cell technology, but their market-up is limited due to their inherent instability affected by heat, light, and moisture. This review aims to analyze the fundamental properties of perovskite solar cells and discuss various processing approaches. Future prospects for enhancing device performance are also discussed.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Ramarajan Ramanathan, Selvakumar Nagarajan, Venkataramana Bonu, Priyanka Patel, Shubhangi Jamdar, Harish C. Barshilia, Ramesh Chandra Mallik
Summary: Thin film technology offers possibilities and advancements in gas sensor devices. Sb-doped nanometer thin-SnO2 films were developed for CO/NH3 gas detection. The structural, surface, optical, and resistivity properties were investigated as a function of film thickness. ATO thin films showed enhanced response towards CO/NH3 gas detection with better stability and selectivity for CO gas. The results indicate the potential application of nanometer ATO films for enhanced gas detection.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Pragya Dixit, Sanyukta Ghosh, Ramesh Chandra Mallik, Tanmoy Maiti
Summary: This study demonstrates the potential of Ti(3)C(2)T(x)MXene in enhancing the thermoelectric performance of CoSb3 using an improved Debye-Callaway model and a four-phonon scattering mechanism. In the composite samples, the addition of MXene not only improves the electrical conductivity and figure of merit, but also enhances the hardness and load-bearing capacity of the samples.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Sanyukta Ghosh, Shubhanth Jain, Soumya Ranjan Mishra, Gerda Rogl, Peter Rogl, Ernst Bauer, B. S. Murty, A. Govindaraj, Ramesh Chandra Mallik
Summary: In this study, reduced graphene oxide (rGO) was uniformly dispersed in the In0.5Co4Sb12 bulk material by ultrasonication, which effectively reduced the lattice thermal conductivity and improved the thermoelectric efficiency.
DALTON TRANSACTIONS
(2024)
Article
Materials Science, Multidisciplinary
Ramarajan Ramanathan, Selvakumar Nagarajan, Surya Sathiyamoorthy, Balaji Manavaimaran, Harish C. Barshilia, Ramesh Chandra Mallik
Summary: A room temperature ethanol gas sensor using antimony-doped tin dioxide nanostructure thin films was prepared and characterized. The results showed that the conductivity of the films increased with Sb doping, and the films exhibited maximum resistance stability up to 350 degrees C. The response and recovery times of the sensor improved with higher Sb-doping content and ethanol exposure level.
MATERIALS ADVANCES
(2023)
Article
Materials Science, Composites
Dineshkumar Mani, Minh Canh Vu, Sebastian Anand, Jun-Beom Kim, Tae-Hyeong Jeong, Il-Ho Kim, Bong Kuk Seo, Md Akhtarul Islam, Sung-Ryong Kim
Summary: This study proposes a stretching-induced filler alignment method to improve the thermal conductivity and electromagnetic interference shielding effectiveness of self-healing polyurethane composites with liquid metal. The alignment of the filler improves the transmission of electrons and phonons, allowing for multiple reflections and absorption of electromagnetic waves, thereby enhancing the performance of the composites.
COMPOSITES COMMUNICATIONS
(2023)
Article
Chemistry, Physical
M. H. Abbasi, R. Tavakoli, S. G. Shabestari
Summary: The correlation between atomic-scale structure and glass-forming ability of ternary bulk metallic glasses was investigated using molecular dynamics simulation. It was found that the potential energy of the icosahedra reflects the geometric ordering, while the virial stress energy density reveals the chemical ordering. Based on this discovery, a new prediction criterion for glass-forming ability was proposed and validated using experimental data.
Article
Chemistry, Physical
Haimin Zhai, Shuai Cui, Sheng Li, Dongqing He, Bo Cheng, Xinjian Zhang, Wensheng Li, Zhornik Viktor, Uladzimir Seniuts
Summary: Laser shock peening (LSP) treatment significantly affects the phase structure and properties of titanium-based BMG materials, promoting rejuvenation and introducing heterogeneity. This leads to improved plasticity and resistance to crack propagation. LSP-1 specimen exhibits higher hardness and plasticity, reducing fatigue peeling wear caused by brittleness. However, excessive LSP results in increased susceptibility to pitting and significantly reduces tribocorrosion resistance.
Article
Chemistry, Physical
Olga A. Blatova, Maria A. Solodovnikova, Ekaterina M. Egorova, Vladislav A. Blatov
Summary: This study applied a universal geometrical-topological approach to analyze the crystal structures of intermetallic compounds deposited in the Inorganic Crystal Structure Database. By exploring the local atomic configurations, they identified different types of coordination polyhedra and proposed criteria for determining geometric instability. This research provides useful indicators for checking crystallographic information and validating structural models.
Article
Chemistry, Physical
Jose M. Torralba, Diego Iriarte, Damien Tourret, Alberto Meza
Summary: The amount of globally recycled e-waste is less than 20% of the total produced. One of the causes for this low recycling rate is the complex and expensive selective sorting of metals. However, recent research has shown that high entropy alloys (HEAs) can be made from complex alloy mixtures, reducing the dependence on pure critical metals. It has been demonstrated that e-waste can be used to produce competitive HEAs.
Article
Chemistry, Physical
M. Y. He, Y. F. Shen, N. Jia, W. Y. Xue, J. P. Li
Summary: This study successfully improved the mechanical properties of high-entropy alloys (HEAs) through phase decomposition modulation, achieving strengthening of low-cost CuFeMnNi HEAs. The annealed HEAs exhibited excellent mechanical properties, with significantly increased yield strength and maintained satisfactory elongation.
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, F. R. Pratama
Summary: In this study, the growth rate of a crystalline phase in the Al-Fe-Mn-Si metallic glass was measured in real time using transmission electron microscopy. The effective diffusion coefficient related to the slowest diffusing element (Mn) was estimated. The results showed that the growth rate of the crystalline phase was significantly faster compared to pure Al and AlFe compound.
Article
Chemistry, Physical
Zhenhua Han, Yubo Tian, Jun Yang, Jianzhao Li, Jinyang Zhang, Gang Liu, Ran Wei, Guojun Zhang
Summary: In this study, a novel medium-entropy alloy (MEA) (Fe65Ni15Cr10Co10)92Ti5Al3 with a dual heterogeneous structure was developed by adding Ti and Al to a previously reported Fe65Ni15Co10Cr10 MEA. The MEA exhibited ultra-high ultimate tensile strength and work hardening extent at room temperature. The addition of Ti and Al induced precipitation and resulted in a continuous FCC -> BCC martensitic transformation and a transformation-induced plasticity effect. The excellent mechanical properties of the alloy were attributed to the synergistic effects of hetero-deformation induced strengthening, precipitation strengthening, and TRIP.
Article
Chemistry, Physical
S. Y. Liang, L. T. Zhang, B. Wang, Y. J. Wang, E. Pineda, J. C. Qiao
Summary: This study focuses on the influence of the thermomechanical protocol on the aging or rejuvenation of glass by decoupling the thermal and mechanical processes. The results show that Labased metallic glass exhibits material hypomnesia, with a clearer rejuvenation trend observed after imposing increasing amplitude strain oscillations. There is a threshold value of the oscillation amplitude that separates the effects of the protocol into acceleration of aging or rejuvenation. This study reveals the correlation between the thermomechanical properties of metallic glass and the previous application of strain oscillations of various amplitudes, providing an effective tool for regulating the structural state of metallic glasses through a simple-operated method.
Article
Chemistry, Physical
Chihui Liu, Hua Zhang, Qing Wang, Panzhi Wang, Jiadian Yang, Fanchao Meng, Xin Zhou, Lilong Zhu, Shangzhou Zhang, Liang Jiang
Summary: Thermal deformation behavior and microstructure evolution of GH141 alloy were efficiently studied using high-throughput double-cone gradient compression. Different compression temperatures resulted in a wide gradient equivalent strain distribution and gradient microstructure. The dynamic recrystallization mechanism shifted towards discontinuous dynamic recrystallization with increasing compression temperature.
Article
Chemistry, Physical
D. Dubaux, J. Zollinger, M. -C. de Weerd, J. Ghanbaja, S. Mathieu, S. Migot, P. Boulet, S. Sturm, V. Fournee, M. Sicot, J. Ledieu
Summary: We report the formation of large and highly twinned dendrites of the Al13Fe4 approximant phase embedded in an fcc Al-rich matrix. Using a rapid cooling technique, the approximant appears as a 10-fold dendrite. The grain distributions within the arm are complex and a single dendrite arm can contain up to four different orientations. Three types of twins, namely {100}, {001} and {201} twins, have been identified. A growth mechanism involving heteroepitaxial growth from a decagonal Al-Fe quasicrystalline seed is proposed to explain the formation of these specific 10-fold motifs.
Article
Chemistry, Physical
Ming Yang, Yibo Zhang, Jie Dong, Yan Huang, Zhichao Lu, Liang Wang, Xuerui Wei, Zhengdong Fu, Jinkui Zhao, Wenli Song, Wei Li, Yuntao Liu, Dong Ma
Summary: A multi-element microalloying strategy has been used to improve the microstructure and mechanical properties of CuZr-based bulk metallic glass composites. Microalloying effectively refines the CuZr phase and results in finely dispersed B2 crystallites embedded in the BMG matrix, leading to the formation of centimeter-sized BMGCs with good mechanical properties.
Article
Chemistry, Physical
Xuejie Zhu, Xuexi Zhang, Mingfang Qian, Ziyi Wang, Aibin Li, Zongning Chen, Muhammad Imran, Lin Geng
Summary: The homogeneous superelastic behavior in shape memory alloys (SMAs) is crucial for their functional and structural fatigue properties, as well as their stable elastocaloric effect (eCE). In this study, a Ti-22Nb-4Zr-2Ta plate was prepared with a strong recrystallized texture, resulting in a completely recoverable superelastic strain and narrow hysteresis. The observation of strain and temperature evolution revealed the importance of diffuse transformation and favorable texture in achieving mesoscopically homogeneous transformation and related elastocaloric effect.
Article
Chemistry, Physical
Mohammad Navazani, Sitarama Raju Kada, Daniel Fabijanic, Matthew Barnett
Summary: This study investigates the effect of Cu and Al addition on an alloy containing multiple principal elements. The results show that adding small amounts of Cu can improve the alloy's ductility and the hardness of the FCC phase can be predicted using a hybrid model. Unlike previous studies, the corrosion resistance of the alloy is not affected by Cu addition, indicating its potential for further development into a fine-grained stainless steel alloy.
Article
Chemistry, Physical
Fatemeh Azizian, Homam Naffakh-Moosavy, Fatemeh Bagheri
Summary: Novel biodegradable Zn-xCu-0.8Mn-0.4Ag alloys were prepared in this study, and the effects of Cu addition and hot extrusion process on microstructure, mechanical properties, and cytotoxicity of the alloys were investigated. The results showed that adding copper and performing a hot extrusion process can significantly improve the mechanical properties of the alloys, making them potential candidates for cardiovascular stents.
Article
Chemistry, Physical
Ivan A. Ditenberg, Denis A. Osipov, Ivan Smirnov, Konstantin V. Grinyaev
Summary: This study investigates the effect of high-temperature annealing on the structural-phase state and microhardness of Ni3Al samples obtained by spark plasma sintering after high-energy ball milling. The results show that certain annealing temperatures promote grain growth and high-density nucleation, leading to the formation of a fine-grained structural state. The study also analyzes the influence of annealing temperature on the strengthening mechanisms.
