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Journal articles on the topic 'Transformer thermal cycling'

Author: Grafiati

Published: 30 June 2021

Last updated: 29 July 2025

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1

Galipeau, James, and George Slama. "Characterization and Reliability Testing on an LTCC Transformer Operable to 250 °C." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, HITEC (2012): 000354–60. http://dx.doi.org/10.4071/hitec-2012-tha24.

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Environments prone to vibration and shocks can cause premature failure in small wire-wound transformers due to cracked cores and broken wires. These problems are only exacerbated by temperatures exceeding 200 °C where the heat causes organic compounds to age rapidly. As more electronics are used in harsh, high temperature environments, high reliability, compact transformers for use in power, filtering, and isolation applications are needed. To address this need monolithic low-temperature co-fired ceramic transformers were developed. In this work transformers were made from a low-temperature, c

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2

Yurkiv, Vitaliy, Yasaman AbdiSobbouhi, Qusai Alahmad, and Todd A. Kingston. "(Invited) Thermal Runaway Prediction in Li-Ion Batteries: Combining Experimental Insights with Multiphysics and Transformer-Based Models." ECS Meeting Abstracts MA2025-01, no. 8 (2025): 822. https://doi.org/10.1149/ma2025-018822mtgabs.

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Thermal runaway (TR) in commercial lithium-ion batteries (LIBs), is a critical challenge for electric vehicles (EVs) safety. This research presents a comprehensive approach to predicting and mitigating TR by integrating experimental testing, multiphysics modeling, and machine learning (ML). Experimental tests were conducted on high capacity commercial cylindrical batteries (e.g., 24 Ah) under thoroughly controlled temperature and humidity conditions, with surface temperatures monitored via FLIR infrared cameras and thermal sensors. Battery cycling was performed across a range of C-rates, inclu

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3

Gaynes, Michael, Timothy Chainer, Edward Yarmchuk, et al. "Using In situ Capacitance Measurements to Monitor the Stability of Thermal Interface Materials in Complex PCB Assemblies." International Symposium on Microelectronics 2010, no. 1 (2010): 000450–57. http://dx.doi.org/10.4071/isom-2010-wa3-paper4.

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A thermal solution for an array of voltage transformer modules which are cooled by a large area, common aluminum heat spreader for a high end server was evaluated using an in situ, capacitive bond line thermal measurement technique. The method measures the capacitance of a non-electrically conducting thermal interface material (TIM) between the electronic module and heat spreader to quantify the TIM bond line effective thickness during assembly and operation. The thermal resistance of the TIM has the same geometric dependence as the inverse of capacitance, therefore, the capacitive technique a

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4

Tokarev, Mikhail. "A Double-Bed Adsorptive Heat Transformer for Upgrading Ambient Heat: Design and First Tests." Energies 12, no. 21 (2019): 4037. http://dx.doi.org/10.3390/en12214037.

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A full scale lab prototype of an adsorptive heat transformer (AHT), consisting of two adsorbers, an evaporator, and a condenser, was designed and tested in subsequent cycles of heat upgrading. The composite LiCl/SiO2 was used as an adsorbent with methanol as an adsorbtive substance under boundary temperatures of TL/TM/TH = −30/20/30 °C. Preliminary experiments demonstrated the feasibility of the tested AHT in continuous heat generation, with specific power output of 520 W/kg over 1–1.5 h steady-state cycling. The formal and experimental thermal efficiency of the tested rig were found to be 0.5

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5

Savin, Olivian, Carmen Badina, Renaud Pollier, et al. "Effect of start and stop cycles on hydropower plants: modelling the deterioration of the equipment to evaluate the cycling cost." IOP Conference Series: Earth and Environmental Science 1136, no. 1 (2023): 012057. http://dx.doi.org/10.1088/1755-1315/1136/1/012057.

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Abstract With the high energy demand, renewable energies emerged and the deregulation of the energy market appeared in the late ’90. These types of energies are intermittent and can produce high fluctuations in the power grid because they are connected only in certain weather conditions (for example: solar energy can be produced only by day and wind energy only when it is windy). Hydropower energy is recognized for its flexibility in responding to the demands of the network in order to maintain a constant level of energy and to guarantee the security of the electrical network. Nowadays, the hy

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6

Hisada, Shota, Mitsuhiro Matsuda, Minoru Nishida, Carlo Biffi, and Ausonio Tuissi. "Microstructure and Martensitic Transformation Behavior in Thermal Cycled Equiatomic CuZr Shape Memory Alloy." Metals 9, no. 5 (2019): 580. http://dx.doi.org/10.3390/met9050580.

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Equiatomic CuZr alloy undergoes a martensitic transformation from the B2 parent phase to martensitic phases (P21/m and Cm) below 150 °C. We clarified the effect of the thermal cycling on the morphology and crystallography of martensite in equiatomic CuZr alloy using a transmission electron microscopy. The 10th cycled specimens consisted of different multiple structures at the maximum temperature of differential scanning calorimetry (DSC) measurement −400 °C and 500 °C, respectively. At the maximum temperature 400 °C of DSC measurement, it is composed of the fine plate-like variants, and a lame

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7

Daróczi, Lajos, Tarek El Rasasi, and Dezső L. Beke. "Effect of Partial Thermal Cycles on Non-Chemical Free Energy Contributions in Polycrystalline Cu-Al-Be Shape Memory Alloy." Materials Science Forum 738-739 (January 2013): 38–45. http://dx.doi.org/10.4028/www.scientific.net/msf.738-739.38.

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Abstract. Thermoelasic martensitic transformations are controlled by the local equilibrium of chemical and non-chemical free energy contributions (D and E being the dissipative and elastic energies, respectively). The derivatives of non-chemical free energies ( ) as a function of the transformed martensite fraction (ξ) can be expressed from the experimental data obtained from the temperature-elongation, temperature-resistance, etc hysteresis loops. This method, developed in our laboratory, was used for the investigation of non complete, partial thermoelastic transformation cycles. In the first

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Sitepu, H., Heinz Günter Brokmeier, Daniel Chateigner, and J. P. Wright. "Crystallographic Phase Composition and Structural Analysis of Ti-Ni-Fe Shape Memory Alloy by Synchrotron Diffraction." Solid State Phenomena 105 (July 2005): 139–44. http://dx.doi.org/10.4028/www.scientific.net/ssp.105.139.

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The preferred crystallographic orientation (i.e. texture) and the non-transformed austenite can cause serious systematic errors in the structural study of the R-phase in 50.75at.%Ti- 47.75at.%Ni-1.50at.%Fe (hereafter referred to as Ti-Ni-Fe ternary) shape memory alloy. The crystal structure refinement of R-phase synchrotron high resolution powder diffraction (SRD) data using Rietveld refinement with generalized spherical harmonic (GSH) description for preferred orientation correction showed that the sample consists of minor cubic phase and the space group was 3 P [1]. The objective of the pres

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9

Wertz, Markus, Florian Fuchs, Hieronymus Hoelzig, et al. "The Influence of Surface Preparation, Chewing Simulation, and Thermal Cycling on the Phase Composition of Dental Zirconia." Materials 14, no. 9 (2021): 2133. http://dx.doi.org/10.3390/ma14092133.

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The effect of dental technical tools on the phase composition and roughness of 3/4/5 yttria-stabilized tetragonal zirconia polycrystalline (3y-/4y-/5y-TZP) for application in prosthetic dentistry was investigated. Additionally, the X-ray diffraction methods of Garvie-Nicholson and Rietveld were compared in a dental restoration context. Seven plates from two manufacturers, each fabricated from commercially available zirconia (3/4/5 mol%) for application as dental restorative material, were stressed by different dental technical tools used for grinding and polishing, as well as by chewing simula

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10

Hu, Tian Qi, Hong Tao Chen, and Ming Yu Li. "Fabrication of Cu@Sn Core-Shell Structured Particles and the Application in High Remelting Temperature Bonding." Materials Science Forum 878 (November 2016): 3–7. http://dx.doi.org/10.4028/www.scientific.net/msf.878.3.

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A novel solder bonding material for high-temperature applications based on Cu@Sn core-shell structured particles was developed, and the fabricated Cu@Sn particles were compressed into preforms for die attachment. The reflow temperature for this bonding material could reached as low as 260°C due to the low melting temperature of the outer Sn layer. However, after reflow soldering, the resulting interconnections can withstand a high temperature of at least 415°C, outer Sn layer completely transformed into Cu-Sn intermetallic compounds (IMCs) with high remelting temperatures. The formed bondlines

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11

Zhao, Bin. "Three-Dimensional Hybrid Nanostructures of Fe3O4 Nanoparticles/Vertically-Aligned Carbon Nanotubes for High-Performance Supercapacitors." Electrochem 3, no. 3 (2022): 507–19. http://dx.doi.org/10.3390/electrochem3030035.

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A three-dimensional (3D) hybrid nanostructure of Fe3O4 nanoparticles uniformly anchored on vertically-aligned carbon nanotubes (VACNTs) was fabricated by a facile two-step method. Assisted by supercritical carbon dioxide (SCCO2), the Fe precursor was firstly absorbed on CNT surface and then transformed into Fe3O4 nanoparticles by vacuum thermal annealing. Owing to the synergetic effects of well-distributed Fe3O4 nanoparticles (~7 nm) and highly conductive VACNTs, the hybrid electrode exhibits a high specific capacitance of 364.2 F g−1 at 0.5 A g−1 within the potential range from −0.9 to +0.1 V

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12

Islam, Atikul, Ally J. Su, Zih-Ming Zeng, Pin Ju Chueh, and Ming-Hung Lin. "Capsaicin Targets tNOX (ENOX2) to Inhibit G1 Cyclin/CDK Complex, as Assessed by the Cellular Thermal Shift Assay (CETSA)." Cells 8, no. 10 (2019): 1275. http://dx.doi.org/10.3390/cells8101275.

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Capsaicin (8-methyl-N-vanillyl-6-noneamide), which is an active component in red chili peppers, is used as a chemopreventive agent that shows favorable cytotoxicity against cancer cells. Accumulating evidence indicates that capsaicin preferentially inhibits a tumor-associated NADH oxidase (tNOX, ENOX2) that is ubiquitously expressed in cancer but not in non-transformed cells. This attenuates cancer cell growth by inducing apoptosis. The capsaicin-mediated inhibition of tNOX was recently shown to prolong the cell cycle. However, the molecular events underlying this regulation have not yet been

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13

De Santis, Eleonora, Annalisa Aurora, Sara Bergamasco, Antonio Rinaldi, Rodolfo Araneo, and Giovanni Battista Appetecchi. "Ionic Liquid Electrolyte Technologies for High-Temperature Lithium Battery Systems." International Journal of Molecular Sciences 26, no. 7 (2025): 3430. https://doi.org/10.3390/ijms26073430.

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The advent of the lithium-ion batteries (LIBs) has transformed the energy storage field, leading to significant advances in electronics and electric vehicles, which continuously demand more and more performant devices. However, commercial LIB systems are still far from satisfying applications operating in arduous conditions, such as temperatures exceeding 100 °C. For instance, safety issues, materials degradation, and toxic stem development, related to volatile, flammable organic electrolytes, and thermally unstable salts (LiPF6), limit the operative temperature of conventional lithium-ion bat

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14

Zhao, Zhong-Chao, Jing Ning, Jie Su, et al. "Microstructure characterization and mechanical behaviour of laser additive manufactured ultrahigh-strength M54 steel." Materials Research Express 9, no. 3 (2022): 036506. http://dx.doi.org/10.1088/2053-1591/ac5955.

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Abstract Ultra high-strength M54 steel blocks were fabricated by laser metal deposition. The microstructure and mechanical behavior of the material were investigated systematically. The microstructure of the as-deposited M54 steel is anisotropic; the cross-section (XOY plane) has a cellular structure, whereas the longitudinal section (XOZ and YOZ planes) shows a mixture of alternating cellular and columnar forms. Compositional segregation is present at the cell walls (interdendritic regions) in the as-deposited state, resulting in retained austenite at the cell walls. The cross-sectional XOY p

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15

Enzmann, F., M. M. Miedaner, M. Kersten, et al. "3-D imaging and quantification of graupel porosity by synchrotron-based micro-tomography." Atmospheric Measurement Techniques 4, no. 10 (2011): 2225–34. http://dx.doi.org/10.5194/amt-4-2225-2011.

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Abstract. The air bubble structure is an important parameter to determine the radiation properties of graupel and hailstones. For 3-D imaging of this structure at micron resolution, a cryo-stage was developed. This stage was used at the tomography beamline of the Swiss Light Source (SLS) synchrotron facility. The cryo-stage setup provides for the first time 3-D-data on the individual pore morphology of ice particles down to infrared wavelength resolution. In the present study, both sub-mm size natural and artificial ice particles rimed in a wind tunnel were investigated. In the natural rimed i

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16

Yang, Gon Seung, Jong Kook Lee, Woo Yang Jang, Soon Jong Jeong, and Kanryu Inoue. "Effect of Aging and Microstructure on Mechanical Rolling CuAlNi Shape Memory Alloy." Materials Science Forum 539-543 (March 2007): 3326–31. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.3326.

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CuAlNi shape memory alloy with Cu-13.5Al-4.5Ni(wt%) composition was prepared by cross-rolling method and the aging effect, phase transformation characteristics, microstructural variation were investigated. Transformation temperature was greatly increased in aged specimens at 250°C. Transformation temperature was not changed after the second reversed transformation, and Ms point was same in most specimens with third reversed transformation cycle. The variation of Ms point was not seen with aging at 100°C, but it was decreased with aging at 250°C. Transformation temperatures appear to be constan

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17

Coster, Paul, Craig Henderson, Steven Hunter, William Marshall, and Colin Pulham. "Explosives at Extreme Conditions: Polymorphism of 2,4-Dinitroanisole." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C896. http://dx.doi.org/10.1107/s2053273314091037.

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2,4-dinitroanisole (DNAN) is an energetic material, developed as an insensitive replacement for TNT in melt-cast explosive formulations. While DNAN-based formulations demonstrate greatly reduced sensitivity to accidental initiation compared to those using TNT, issues remain with the replacement of TNT with DNAN. For instance, DNAN based formulations have demonstrated catastrophic levels of irreversible growth during heat-cycling, with volume increases of up to 15% reported. [1] In order to investigate the role of polymorphism in the irreversible growth of DNAN, high-pressure and variable-tempe

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18

Park, Sanghyuk, Kwangho Park, Ji-Seop Shin та ін. "Utilizing the Intrinsic Thermal Instability of Swedenborgite Structured YBaCo4O7+δ as an Opportunity for Material Engineering in Lithium-Ion Batteries by Er and Ga Co-Doping Processes". Materials 14, № 16 (2021): 4565. http://dx.doi.org/10.3390/ma14164565.

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We firstly introduce Er and Ga co-doped swedenborgite-structured YBaCo4O7+δ (YBC) as a cathode-active material in lithium-ion batteries (LIBs), aiming at converting the phase instability of YBC at high temperatures into a strategic way of enhancing the structural stability of layered cathode-active materials. Our recent publication reported that Y0.8Er0.2BaCo3.2Ga0.8O7+δ (YEBCG) showed excellent phase stability compared to YBC in a fuel cell operating condition. By contrast, the feasibility of the LiCoO2 (LCO) phase, which is derived from swedenborgite-structured YBC-based materials, as a LIB

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19

Wang, Yunke, Guozheng Zha, Yenan Zhang, et al. "Study of the Composite Modified Positive Electrode between NCM811 and V2O5 Materials in Li-Ion Cells." Nano 16, no. 03 (2021): 2150032. http://dx.doi.org/10.1142/s1793292021500326.

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The possibility of combining the promising cathode material LiNi[Formula: see text]Co[Formula: see text]Mn[Formula: see text]O2 (NCM811) with V2O5 material with excellent conductivity as a composite cathode material for lithium-ion batteries was discussed. The fact that the mechanical and physical mixing process did not change the original structure of both NCM811 and V2O5 was confirmed by XRD. SEM and TEM show that the V2O5 particles were attached to the surface of NCM811 and filled the gaps between NCM811 particles. Furthermore, TEM image after cycling reveals that the gathering of Nano-plat

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20

Deschaseaux, Elisabeth, James O'Brien, Nachshon Siboni, Katherina Petrou, and Justin R. Seymour. "Shifts in dimethylated sulfur concentrations and microbiome composition in the red-tide causing dinoflagellate <i>Alexandrium minutum</i> during a simulated marine heatwave." Biogeosciences 16, no. 22 (2019): 4377–91. http://dx.doi.org/10.5194/bg-16-4377-2019.

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Abstract. The biogenic sulfur compounds dimethyl sulfide (DMS), dimethyl sulfoniopropionate (DMSP) and dimethyl sulfoxide (DMSO) are produced and transformed by diverse populations of marine microorganisms and have substantial physiological, ecological and biogeochemical importance spanning organism to global scales. Understanding the production and transformation dynamics of these compounds under shifting environmental conditions is important for predicting their roles in a changing ocean. Here, we report the physiological and biochemical response of a robust strain of Alexandrium minutum, a

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21

Shamji, Mohammed F., Odelia Ghodsizadeh, Allan H. Friedman, William J. Richardson, Ashutosh Chilkoti, and Lori A. Setton. "Development of a thermally responsive peptide for sustained deliver of solyble TNF receptor II to attenuate inflammatory events associated with radiculopathys." Clinical & Investigative Medicine 30, no. 4 (2007): 94. http://dx.doi.org/10.25011/cim.v30i4.2873.

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Background: Tumor necrosis factor alpha (TNFα) is a cytokine that may mediate inflammatory histopathology of the dorsal root ganglion following lumbar disc herniation.1 Soluble TNF receptor II (sTNFRII) competitively binds TNFa with clinical value for painful radiculopathy.2 Bioactive peptides expressed with elastin-like polypeptides (ELP) fusion partners gain a thermally responsive domain, by which they can undergo hydrophobic collapse and separate from solution to aggregate at physiological temperatures.3 Protein release from such a depot may locally sustain drug presence, an effect demonstr

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22

Alzaher, Zahra A., Fatimah A. Aldobais, Zainab Albazroun, et al. "Antifungal Efficacy and Surface Properties of Conventional and 3D-Printed Denture Base Materials Modified with Titanium Tetrafluoride (TiF4): In Vitro Study." Polymers 17, no. 10 (2025): 1403. https://doi.org/10.3390/polym17101403.

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Background: Candida albicans adhesion to denture base materials is a primary contributor to denture stomatitis. To address this issue, numerous studies have explored the incorporation of various additives into denture base resins to enhance their antifungal properties. Titanium tetrafluoride (TiF4) is an inorganic fluoride compound that has proven antimicrobial properties but has not yet been tested with denture materials. This study aimed to evaluate the effect of TiF4 addition into different denture base materials on antifungal activity, surface roughness, hardness, and color properties. Met

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23

Oka, Yuki, Jun Manabe, Hideo Daimon, Takayuki Doi, and Minoru Inaba. "Synthesis of Multicomponent Pt Alloy Catalysts for Oxygen Reduction Reaction and Durability Evaluation." ECS Meeting Abstracts MA2024-02, no. 41 (2024): 2656. https://doi.org/10.1149/ma2024-02412656mtgabs.

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Introduction In order to popularize PEFCs, it is important to increase the oxygen reduction reaction (ORR) activity and reduce the amount of expensive Pt catalyst used. It is well known that the Pt-based alloy catalysts show high ORR activity, but the problem is that the 3d transition metals are oxidatively dissolved in the PEFC cathode environment, deteriorating the ORR activity. Studies using single crystal model electrodes have reported that a high-entropy alloy (HEA) catalyst (PtFeCoNiCu) exhibits higher ORR activity and durability compared to a PtCo binary alloy catalyst [1]. Chida et al.

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24

Hartmann, Jean-Michel. "(Electronics and Photonics Division Award) Epitaxy of Group-IV Semiconductors for Nanoelectronics and Optoelectronics." ECS Meeting Abstracts MA2023-01, no. 29 (2023): 1775. http://dx.doi.org/10.1149/ma2023-01291775mtgabs.

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Epitaxy stands for the deposition of a perfectly ordered layer on a monocrystalline substrate, which is typically, for group-IV semiconductors, bulk Si or Silicon-On-Insulator (SOI). If the layer is chemically different from the substrate and lattice parameters are not the same, epitaxy can be of two types. If the atomic columns of the substrate extend into the layer with the same in-plane lattice parameter, the layer will be pseudomorphic. The built-in strain will be compressive if the layer has a larger lattice parameter than that of the substrate or tensile if it is lower. If the layer thic

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25

Ozdemir, Niyazi, Furkan Sarsilmaz, and Nuri Orhan. "The Effect of Cementite Size and Morphology on the Abrasive Wear Behavior of UHC Steel." Journal of Tribology 130, no. 2 (2008). http://dx.doi.org/10.1115/1.2842238.

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In this study, the abrasive wear behavior of a grain refined hypereutectoid carbon steel containing 1.2% C, 4% Al, 0.20% Mo, and 0.1% Ti was investigated experimentally. Thermal cycles were applied to all specimens about ten times to obtain a fine-grained structure and to gain more softness structures, such as spheroidized cementite for these steels. After every thermal cycle, the microstructures of specimens were examined by scanning electron microscopy to determine the transformation mechanism of structure. Microstructure analyses showed that size of cementite decreased as a function of heat

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26

Nagy, András Lajos. "Friction and Wear of the Piston Ring – Cylinder Liner System with Artificially Aged Ultra-low Viscosity Engine Oils." Periodica Polytechnica Transportation Engineering, January 9, 2024. http://dx.doi.org/10.3311/pptr.22918.

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This study aims to investigate the performance of artificially aged prototype engine oils through friction and wear experiments. Experiments were performed on a piston ring – cylinder liner model system with boundary conditions derived from real-life operating conditions. The experimental design implemented two prototype oils (SAE 0W-12 and 0W-16) in unaltered and artificially aged form. An additional fully formulated off-the-shelf engine oil (SAE 0W-20) was also aged and analyzed as reference. Oil samples were artificially aged in a custom rig, to simulate long-term in-engine use through ther

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Moreno, André Luiz de Melo, Daniela Micheline dos Santos, André Pinheiro de Magalhães Bertoz, and Marcelo Coelho Goiato. "Abutment on Titanium-Base Hybrid Implant: A Literature Review." European Journal of Dentistry, October 11, 2022. http://dx.doi.org/10.1055/s-0042-1750801.

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AbstractAn increase in the use of Computer-Aided Design (CAD) and Computer-Aided Manufacturing (CAM) technologies challenges the conventional prosthetic fabrication procedures that are practical and centered on a digital workflow for the patient, especially for dental implants. Increasing workflow of digital restoration work, considering computer-used CAM for restoration technology systems and also fast/CAM for building restoration technology; fast/CAD, also known as abut-Base, has increased interest. Studies on adaptation of different restorative materials, on titanium (Ti)-base abutments, tr

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Durán‐Vinet, Benjamín, Jo‐Ann L. Stanton, Gert‐Jan Jeunen, et al. "CRISPR‐Based Environmental Biosurveillance Assisted via Artificial Intelligence Design of Guide‐RNAs." Environmental DNA 7, no. 3 (2025). https://doi.org/10.1002/edn3.70105.

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ABSTRACTEnvironmental biosecurity challenges are intensifying as climate change and human activities accelerate the spread of invasive species, disrupting ecosystem composition, function, and essential services. Environmental DNA (eDNA) has transformed traditional biosurveillance by detecting trace DNA fragments left by organisms in their surroundings, primarily by applying quantitative polymerase chain reaction (qPCR) methods. However, qPCR presents challenges, including limited portability, reliance on precise thermal cycling, and susceptibility to inhibitors. To address these challenges and

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Burra, K. G., A. K. Gupta, and S. Kerdsuwan. "Isothermal Splitting of CO2 to CO Using Cobalt-Ferrite Redox Looping." Journal of Energy Resources Technology 143, no. 3 (2020). http://dx.doi.org/10.1115/1.4048077.

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Abstract Rising atmospheric CO2 levels from significant imbalance between carbon emissions from fossil fuel utilization, especially for energy and chemicals, and natural carbon sequestration rates is known to drive-up the global temperatures and associated catastrophic climate changes, such as rising mean sea level, glacial melting, and extinction of ecosystems. Carbon capture and utilization techniques are necessary for transition from fossil fuel infrastructure to renewable energy resources to help delay the dangers of reaching to the point of positive feedback between carbon emissions and c

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