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Journal articles on the topic 'Diffusion activation energy'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Divya, V. D., U. Ramamurty, and Aloke Paul. "Diffusion in Co-Ni System Studied by Multifoil Technique." Defect and Diffusion Forum 312-315 (April 2011): 466–71. http://dx.doi.org/10.4028/www.scientific.net/ddf.312-315.466.

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Diffusion couple experiments were performed in the Co-Ni binary system for determining inter-, impurity- and intrinsic-diffusion coefficients in the temperature range of 1050 - 1250°C. The activation energy and pre-exponential factor estimated for interdiffusion do not vary significantly with composition. The activation energy calculated for impurity diffusion experiments shows is higher than . Intrinsic diffusion coefficients estimated from the multifoil experiment show that Ni is the fastest diffusing species in this system.

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2

Korablev, G. A. "Calculations of activation energy of diffusion and self-diffusion." European Chemical Bulletin 7, no. 1 (2018): 23. http://dx.doi.org/10.17628/ecb.2018.7.23-29.

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3

Yang, Li, Li Xiaoyan, and Peng Yao. "The effect of vacancy on the interfacial diffusion in Cu/Sn lead-free solder joints." Soldering & Surface Mount Technology 31, no. 1 (2019): 28–39. http://dx.doi.org/10.1108/ssmt-03-2018-0010.

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Purpose The purpose of this paper is to investigate the diffusion behaviors of different atoms at the Cu/Cu3Sn interface and the vacancy formation energy, diffusion energy barrier and vacancy diffusion activation energy. Design/methodology/approach The diffusion behaviors of different atoms at the Cu/Cu3Sn interface are analyzed, and the vacancy formation energy, diffusion energy barrier and vacancy diffusion activation energy are obtained using molecular dynamics simulation. The nudged elastic band method is used to evaluate diffusion energy barrier for Cu/Cu3Sn system. Findings It is found t

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4

Wolfenstine, J., T. R. Armstrong, W. J. Weber, M. A. Boling-Risser, K. C. Goretta, and J. L. Routbort. "Elevated temperature deformation of fine-grained La0.9Sr0.1MnO3." Journal of Materials Research 11, no. 3 (1996): 657–62. http://dx.doi.org/10.1557/jmr.1996.0079.

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Compressive creep behavior of fine-grained (5 μm) La0.9Sr0.1MnO3with a relative theoretical density between 85 and 90% was investigated over the temperature range 1150–1300 °C in air. The fine grain size, brief creep transients, stress exponent close to unity, and absence of deformation-induced dislocations, suggested that the deformation was controlled by a diffusional creep mechanism. The activation energy for creep of La0.9Sr0.1MnO3was 490 kJ/mole. A comparison of the activation energy for creep of La0.9Sr0.1MnO3with existing diffusion and creep data for perovskite oxides suggested that the

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5

Liu, Shuai, Binbin Liao, Baohua Nie, et al. "First-Principles Study of Atomic Diffusion by Vacancy Defect of the L12-Al3M (M = Sc, Zr, Er, Y) Phase." Molecules 28, no. 18 (2023): 6727. http://dx.doi.org/10.3390/molecules28186727.

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Atomic diffusion by the vacancy defect of L12-Al3M (M = Sc, Zr, Er, Y) was investigated based on a first-principles calculation. The point defect formation energies were firstly evaluated. Then, the migration energy for different diffusion paths was obtained by the climbing-image nudged elastic band (CI-NEB) method. The results showed that Al atomic and M atomic diffusions through nearest-neighbor jump (NNJ) mediated by Al vacancy (VAl) were, respectively, the preferred diffusion paths in Al3M phases under both Al-rich and M-rich conditions. The other mechanisms, such as six-jump cycle (6JC) a

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6

Штапенко, Э. Ф., В. В. Титаренко, В. А. Заблудовский та Е. О. Воронков. "Квантово-механический подход к определению энергии активации поверхностной диффузии". Физика твердого тела 62, № 11 (2020): 1943. http://dx.doi.org/10.21883/ftt.2020.11.50074.129.

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A quantum-mechanical approach is proposed for determining the activation energy of surface diffusion for adsorbed atoms of copper, nickel, zinc and iron on a copper substrate during electrocrystallization for various substrate overpotential. The calculation of the activation energy of surface diffusion is performed through the total energy of the crystal. An increase in the activation energy of surface diffusion with an increase in the surface potential is associated with an increase in the binding energy of the ad-atom with the substrate

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7

Zhang, Xi, Joseph Kulik, and Elizabeth C. Dickey. "Diffusion in SixGe1−x/Si Nanowire Heterostructures." Journal of Nanoscience and Nanotechnology 7, no. 2 (2007): 717–20. http://dx.doi.org/10.1166/jnn.2007.155.

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Si0.48Ge0.52/Si tip/nanowire heterostructures were grown by pulsed laser vaporization (PLV) at a growth temperature of 1100 °C. Ge diffusion in [111]-growth Si nanowires was studied for different post-synthesis annealing temperatures from 200 °C to 800 °C. Ge composition profiles were quantified by energy-dispersive X-ray spectroscopy in a transmission electron microscope. The compositional profiles were modeled by a limited-source diffusion model to extract temperature-dependent diffusion coefficients. The Ge diffusion coefficients followed an Arrhenius relationship with an activation energy

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8

Kublanovskii, Valeriy, and Vasyl Nikitenko. "DEPENDENCE ACTIVATION ENERGY OF THE ELECTROREDUCTION OF PALLADIUM(II) BIS-HYDROXYETHYLIMINODIACETATE COMPLEXES ON THE OVERPOTENTIAL." Ukrainian Chemistry Journal 85, no. 1 (2019): 32–37. http://dx.doi.org/10.33609/0041-6045.85.1.2019.32-37.

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The kinetic (exchange currents, apparent elect-ron transfer coefficients) and energetic (activation energies of diffusion and electron-transfer reaction) parameters of electroreduction of palladium (II) bis-hydroxyethyliminodiacetate complexes from an ele-ctrolyte containing an excess of free ligand have been determined. A method is proposed for calculating the actual activation energy of the electrode process that is controlled by mixed kinetics, based on the dif-fusion activation energy, transition reaction and the ratio of surface and volume concentrations of potenti-al-determining ions in

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9

Doremus, R. H. "Diffusion of water in crystalline and glassy oxides: Diffusion–reaction model." Journal of Materials Research 14, no. 9 (1999): 3754–58. http://dx.doi.org/10.1557/jmr.1999.0508.

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Diffusion of water in oxides is modeled as resulting from the solution and diffusion of molecular water in the oxide. This dissolved water can react and exchange with the oxide network to form immobile OH groups and different hydrogen and oxygen isotopes in the oxide. The model agrees with many experiments on water diffusion in oxides. The activation energy for diffusion of water in oxides correlates with the structural openness of the oxide, suggesting that molecular water is the diffusing species.

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10

Wu, P., Y. Zeng, and H. M. Jin. "Calculation of diffusion activation energy by thermodynamic model." Journal of Physics: Conference Series 423 (April 10, 2013): 012040. http://dx.doi.org/10.1088/1742-6596/423/1/012040.

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11

Akhter, J. I., and K. Yaldram. "Self Diffusion and Activation Energy of Liquid Palladium." International Journal of Modern Physics C 08, no. 06 (1997): 1217–21. http://dx.doi.org/10.1142/s0129183197001089.

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Molecular dynamics studies of the temperature dependence of self diffusion coefficient of palladium has been carried out using the many body potential generated by the Embedded Atom Method of Daw and Baskes. These values as well as the results for activation energy are compared with similar results for other fcc metals.

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12

Jiang, Q., S. H. Zhang, and J. C. Li. "Grain size-dependent diffusion activation energy in nanomaterials." Solid State Communications 130, no. 9 (2004): 581–84. http://dx.doi.org/10.1016/j.ssc.2004.03.033.

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13

Jannot, E., Volker Mohles, Günter Gottstein, and B. Thijsse. "Atomistic Simulation of Pipe Diffusion in AlCu Alloys." Defect and Diffusion Forum 249 (January 2006): 47–54. http://dx.doi.org/10.4028/www.scientific.net/ddf.249.47.

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Activation energies for solute diffusion along dislocations are difficult to measure experimentally. The aim of this work is to provide insight into pipe diffusion with the help of atomistic simulations. The distribution of vacancy formation energy and the activation energy for copper migration are determined in the core of an edge dislocation in aluminum. The Dimer method is used to find activation energies for vacancy migration. The activated region around the dislocation where a very high diffusivity is observed and the activation energy for copper diffusion associated with this region are

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14

Sabioni, Antônio Claret Soares, Anne Marie Huntz, F. Silva, and François Jomard. "Study of Fe Diffusion in Cr₂O₃ by Secondary Ion Mass Spectrometry." Defect and Diffusion Forum 237-240 (April 2005): 940–45. http://dx.doi.org/10.4028/www.scientific.net/ddf.237-240.940.

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Chromia protective layers are used to prevent corrosion by oxidation of many alloys, such as the stainless steels, for instance. To check if chromia is a barrier to the outward diffusion of iron in these alloys, iron diffusion in chromia was studied in both polycrystals and oxide films formed by oxidation of Ni-30Cr alloy in the temperature range 700-1100°C at an oxygen pressure equal to 10-4 atm. An iron film of about 70 nm thick was deposited on the chromia surface, and after the diffusing treatment, the iron depth profiles were established by secondary ion mass spectrometry (SIMS). Using a

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15

Zhivoderov, A. A., and A. N. Varaksin. "Quantum mechanical activation energy of vacancy diffusion in crystals." Soviet Physics Journal 31, no. 4 (1988): 282–84. http://dx.doi.org/10.1007/bf00892633.

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16

Patil, S. F., A. V. Borhade, and Munmun Nath. "Activation energy for electrolyte diffusion of some zinc salts." Journal of Radioanalytical and Nuclear Chemistry Letters 176, no. 2 (1993): 161–67. http://dx.doi.org/10.1007/bf02163196.

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17

Vogel, Julius, Michael R. Kessler, Sriram Sundararajan, and David Grewell. "Activation energy for diffusion and welding of PLA films." Polymer Engineering & Science 52, no. 8 (2012): 1693–700. http://dx.doi.org/10.1002/pen.23120.

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18

Kirchheim, R., and X. Y. Huang. "A Relationship between Prefactor and Activation Energy for Diffusion." physica status solidi (b) 144, no. 1 (1987): 253–57. http://dx.doi.org/10.1002/pssb.2221440123.

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19

Nayak, Tapan K., and Anthony Auerbach. "Cyclic activation of endplate acetylcholine receptors." Proceedings of the National Academy of Sciences 114, no. 45 (2017): 11914–19. http://dx.doi.org/10.1073/pnas.1711228114.

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Agonists turn on receptors because they have a higher affinity for active versus resting conformations of the protein. Activation can occur by either of two pathways that connect to form a cycle: Agonists bind to resting receptors that then become active, or resting receptors activate and then bind agonists. We used mutations to construct endplate acetylcholine receptors (AChRs) having only one functional neurotransmitter-binding site and single-channel electrophysiology to measure independently binding constants for four different agonists, to both resting and active conformations of each sit

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20

Gupta, Mukul, Ajay Gupta, Sujoy Chakravarty, and Thomas Gutberlet. "Iron Self-Diffusion in Chemically Homogeneous Multilayers." Defect and Diffusion Forum 237-240 (April 2005): 548–53. http://dx.doi.org/10.4028/www.scientific.net/ddf.237-240.548.

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Iron self-diffusion measurements in amorphous and nanocrystalline chemically homogenous multilayers (CHM) of FeZr/57FeZr, (with nm range periodicity) have been studied with neutron reflectivity technique. It has been found that both the activation energy for diffusion and the pre-factor were significantly smaller as compared with bulk alloys. Effect of compressive stress on self-diffusion reveals a significant dependence on the activation energy as a function of applied stress. On the basis of the obtained results the diffusion mechanism in amorphous and nanocrystalline CHM of FeZr/57FeZr is r

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21

Journal, Baghdad Science. "Effect of Diffusion Temperature on the some Electrical Properties of CdS:In Thin Films Prepared by Vacuum Evaporation." Baghdad Science Journal 14, no. 4 (2017): 793–96. http://dx.doi.org/10.21123/bsj.14.4.793-796.

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CdS films were prepared by thermal evaporation technique at thickness 1 µm on glass substrates and these films were doped with indium (3%) by thermal diffusion method. The electrical properties of these have been investigated in the range of diffusion temperature (473-623 K)> Activation energy is increased with diffusion temperature unless at 623 K activation energy had been decreased. Hall effect results have shown that all the films n-type except at 573 and 623 K and with increase diffusion temperature both of concentration and mobility carriers were increased.

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22

Dorofeyev, V. Yu, D. N. Sviridova, and Kh S. Kochkarova. "On the question of the applicability of G.V. Samsonov’s activated sintering concept in studying the processes of powder material deformation." Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya (Universitiesʹ Proceedings. Powder Metallurgy аnd Functional Coatings), no. 4 (December 15, 2018): 6–14. http://dx.doi.org/10.17073/1997-308x-2018-4-6-14.

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Some Yu.G. Dorofeev’s memoirs about joint work and meetings with outstanding materials science expert G.V. Samsonov are given. Meetings in Yugoslavia were of particular importance where G.V. Samsonov and M.M. Ristićtogether with other worldfamous scientists created the International Institute for the Science of Sintering. In the last years of his life, G.V. Samsonov proposed the concept of sintering activation by additives that act as electron acceptors and additionally contribute to the ionic bond in the matrix material. The paper considers the possibility of using this concept in the develop

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23

Yamanoi, Yuta, and Satoru Nakashima. "In situ High-Temperature Visible Microspectroscopy for Volcanic Materials." Applied Spectroscopy 59, no. 11 (2005): 1415–19. http://dx.doi.org/10.1366/000370205774783205.

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In situ high-temperature visible microspectroscopy has been developed in order to study color change kinetics of volcanic materials. Olivine thin sections put on a synthetic alumina plate are heated on a heating stage at 600–800 °C under a visible microspectroscope. Changes in visible absorption spectra are monitored every 60 s for 5 hours. The obtained high-temperature visible spectra showed a gradual increase with time in absorbance in the shorter wavelength region (400–600 nm). The 430 nm absorbance (ligand field transition of Fe3+) increased more with time at higher temperatures. Assuming

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24

Lanin, Vladimir Leonid. "Innovation Ultrasonic Assistant Soldering in Electronics." Journal of Electronic Research and Application 5, no. 3 (2021): 18–27. http://dx.doi.org/10.26689/jera.v5i3.1662.

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Innovative approaches in ultrasonic assistant soldering consist consists of increasing the activity of cavitation and accelerating diffusion processes at the interface between the solder and the soldering material. Besides that, it improves the effectiveness of cavitation processes in melts by saturating gas cavities with diamete rs that are smaller than the resonant sizes of cavitation germs. Gas saturation of liquids and melts raises level of cavitation pressure by 20 25%25%, that intensifies US processing of cleaning, soldering and metallization. Modelling diffusion process showed that the

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25

Widyasaputra, Reza, Adi Ruswanto, Ngatirah Ngatirah, and Sunardi Sunardi. "DEVELOPMENT OF TIME-TEMPERATURE INDICATOR FROM RED PALM OIL AND MAIZE OIL BLENDING." Jurnal Pangan dan Agroindustri 10, no. 3 (2022): 151–57. http://dx.doi.org/10.21776/ub.jpa.2022.010.03.3.

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Time-temperature indicator could be used to monitor temperature changes during storage and distribution. The time-temperature indicator with red palm oil and maize oil was evaluated to find the diffusion prediction model and the right oil blending proportion based on activation energy. This research was performed in two stages. Stage 1 was production of red palm oil and maize oil blending in five ratios: A1 (70:30), A2 (60:40), A3 (50:50), A4 (40:60), A5 (30:70) (%v/v). Stage 2 was measurement of diffusion rate, coefficient, kinetics and activation energy in photo paper medium at 4, 29, 37, 44

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26

Bezpalchuk, Volodymyr, Rafal Abdank-Kozubski, Mykola Pasichnyy, and Andriy Gusak. "Tracer Diffusion and Ordering in FCC Structures - Stochastic Kinetic Mean-Field Method vs. Kinetic Monte Carlo." Defect and Diffusion Forum 383 (February 2018): 59–65. http://dx.doi.org/10.4028/www.scientific.net/ddf.383.59.

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Recently developed method of atomistic modelling (SKMF) is applied to order-disorder transitions in FCC alloys and to tracer diffusion in the ordered L12 structure. Results correlate with Kinetic Mote-Carlo modelling. Difference of diffusion activation energies of two species is found. Activation energy of ordering is close to one of minority component diffusion.

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27

Luniakov, Yuri V. "DFT Simulation of the Extra Me Adatom Diffusion on the Ge(111) √3×√3 1/3 ML Me Induced Surfaces." Solid State Phenomena 213 (March 2014): 12–18. http://dx.doi.org/10.4028/www.scientific.net/ssp.213.12.

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A first-principle simulation of the surface diffusion of an extra metal (Me) adatom on the corresponding 1/3 monolayer (ML) Ge (111)√3×√3 Me induced surfaces has been performed. Using the Nudged Elastic Band (NEB) optimization method, the minimum energy paths and activation energy barrier profiles for all known Me inducing √3×√3 reconstruction on a Ge(111) surface have been obtained. The value of the activation barrier is shown to depend on the adatom formation energies and the atomic radius of the diffusing metal: 0.33 eV for Pb and 0.25 eV for Sn. The Arrhenius pre-exponential factors that w

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28

de Campos, Marcos Flavio. "Diffusion Coefficients of Interest for the Simulation of Heat Treatment in Rare-Earth Transition Metal Magnets." Materials Science Forum 727-728 (August 2012): 163–68. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.163.

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In the case of the modeling of sintering and heat treatments, the diffusion coefficients are an essential input. However, experimental data in the literature about diffusion coefficients for rare-earth transition metal intermetallics is scarce. In this study, the available data concerning diffusion coefficients relevant for rare-earth transition metal magnets are reviewed and commented. Some empirical rules are discussed, for example the activation energy is affected by the size of the diffusing impurity atom. Diffusion coefficients for Dy, Nd and Fe into Nd2Fe14B are given according an Arrhen

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29

Liu, Yuan, Qin Sheng Wang, Rachel C. Thomson та Steven Kenny. "Calculation of Diffusion Coefficients in γ-Ni". Key Engineering Materials 795 (березень 2019): 15–21. http://dx.doi.org/10.4028/www.scientific.net/kem.795.15.

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A model has been developed to predict the interdiffusion behaviour of elements between a substrate and a coating. This model, however, relies on knowing accurate diffusion coefficients. However, only limited diffusion data are available in the literature. Recently, it has been demonstrated that Density Functional Theory (DFT) can be used to calculate relevant diffusion coefficients with reasonable accuracy. According to the vacancy diffusion mechanism , diffusion coefficient has an Arrhenius form. The diffusion activation energy can be written as a sum of the diffusion energy barrier and the v

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30

Gang, Ui Gu, Dae Bum Park, and Won Jong Nam. "Annealing Behavior during Heating Rate of Ultrafine-Grained 5052 Al Alloy deformed at Cryogenic Temperature." Materials Science Forum 558-559 (October 2007): 735–40. http://dx.doi.org/10.4028/www.scientific.net/msf.558-559.735.

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The microstructural evolution during thermal annealing of a cryogenic rolled 5052 Al alloy was investigated. The activation energy for annealing behavior was calculated using DSC data. For the heating rate of 16°C/min, the precipitation occurred at the annealing temperature of 150~230°C due to Mg self diffusion, recovery occurred at the annealing temperature of 230~260°C, and recrystallization proceeded at a higher temperature up to about 370°C. Both recovery and recrystallization gave rise to non-uniform, bimodal grain-size distributions, which may result from heterogeneous nanostructures. In

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31

Kondratyev, Vladimir V., Alexander G. Kesarev, and Ilya L. Lomaev. "Grain Boundary Diffusion in Nanocrystalline Materials Produced by Severe Plastic Deformation." Diffusion Foundations 5 (July 2015): 129–43. http://dx.doi.org/10.4028/www.scientific.net/df.5.129.

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The model of diffusional mass transfer in the medium with a strong spatial dependence of diffusivity and its application to the grain boundary (GB) diffusion problem is presented. A significant decrease of diffusion activation energy is shown to take place takes place in the vicinity of non-equilibrium grain boundary, which leads to the formation of a region of enhanced diffusion. The generalization of grain boundary diffusion theory is given which accounts for the diffusion enhancement near GB. An original mathematical approach is developed and general asymptotic solutions of the one-and two-

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32

Cahoon, J. R. "The "C" Factor in LeClaire's Theory of Solute Impurity Diffusion." Defect and Diffusion Forum 237-240 (April 2005): 101–6. http://dx.doi.org/10.4028/www.scientific.net/ddf.237-240.101.

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The "C" factor for the calculation of the relative activation energy for solute impurity diffusion using LeClaire's theory as modified by Burachynsky and Cahoon has been determined for the diffusion of several solutes in FCC Cu , FCC Fe and BCC Fe. Inclusion of the "C" factor results in good agreement between the calculated and experimental values of relative activation energy for impurity diffusion inn the solvents considered. For positive values of relative valence, Z, the value of C is given by C » 20 Z. For negative values of Z, C » 0.

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33

Lee, Ji Hun, Ye Won Kim, Do Jung Kim, Nak Kwan Chung, and Jae Kap Jung. "Comparison of Two Methods for Measuring the Temperature Dependence of H2 Permeation Parameters in Nitrile Butadiene Rubber Polymer Composites Blended with Fillers: The Volumetric Analysis Method and the Differential Pressure Method." Polymers 16, no. 2 (2024): 280. http://dx.doi.org/10.3390/polym16020280.

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Hydrogen uptake/diffusivity in nitrile butadiene rubber (NBR) blended with carbon black (CB) and silica fillers was measured with a volumetric analysis method in the 258–323 K temperature range. The temperature-dependent H2 diffusivity was obtained by assuming constant solubility with temperature variations. The logarithmic diffusivity decreased linearly with increasing reciprocal temperature. The diffusion activation energies were calculated with the Arrhenius equation. The activation energies for NBR blended with high-abrasion furnace CB and silica fillers increased linearly with increasing

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Zhao, Yingying, Jiping Wang, Lixue Zhang, Shujuan Liu, Dawei Zhang, and Xuan Wang. "Large activation energy in aged Mn-doped Sr0.4Ba0.6Nb2O6 ferroelectric ceramics." RSC Advances 7, no. 43 (2017): 26894–902. http://dx.doi.org/10.1039/c7ra03080k.

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35

Dudko, Valeriy, Rustam Kaibyshev, Andrey Belyakov, Yoshikazu Sakai, and Kaneaki Tsuzaki. "Creep Behavior of an Oxide Dispersion Strengthened Iron with Ultrafine Grain Structure." Materials Science Forum 638-642 (January 2010): 3194–99. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.3194.

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The creep behavior of oxide-bearing Fe-0.6%O steel was studied in the temperature range of 550-700°C at stresses ranging from 100 to 400 MPa. The creep data showed high values of an apparent stress exponent n close to 16 for power-law creep. In addition the apparent experimental activation energy was much higher than that for the lattice diffusion in -iron. Analysis of creep data revealed that the deformation behavior was strongly affected by the threshold stresses, which are associated with the interaction between moving dislocations and fine incoherent oxide particles. Analysis of deformat

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36

Park, Myung Beom, and Nam Hee Cho. "Determination of Diffusion Kinetic Parameters and Potential Barrier Height at the Grain Boundary of the Semiconducting SrTiO₃ Ceramics." Materials Science Forum 449-452 (March 2004): 733–36. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.733.

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The chemical and electrical characteristics of the grain boundary of the polycrystalline semiconducting SrTiO3 ceramics, which were synthesized by hot-press sintering Na-coated semiconducting SrTiO3 powders, were investigated in terms of process parameters such as sintering temperature. Diffusion kinetic parameters such as diffusion coefficients and activation energy of diffusing ions at particular heat-treatment conditions were obtained by fitting experimental data with computer-simulated results as well as electrical features near the grain boundary of the ceramics.

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Ewender, Johann, and Frank Welle. "Diffusion Coefficients of n-Alkanes and 1-Alcohols in Polyethylene Naphthalate (PEN)." International Journal of Polymer Science 2019 (February 14, 2019): 1–9. http://dx.doi.org/10.1155/2019/2748649.

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Polyethylene naphthalate (PEN) is a polyester polymer with well-known good barrier properties. PEN had been used in the food packaging area till 2012 especially as refillable bottles for soft drinks, juices, and beer. Now, PEN is mainly used in technical applications, e.g., for data storage tapes and organic light-emitting diode (OLED) applications. The aim of the study was the determination of the diffusion coefficients of organic molecules (n-alkanes, 1-alcohols) in PEN. Diffusion and partition coefficients were determined from the lag times of the permeation process of the permeants through

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Yano, Takahiko, Naoko Ikeo, Hiroyuki Watanabe, and Toshiji Mukai. "Superplastic Deformation Behavior in Dual-Phase Mg-Ca Alloy." Materials Science Forum 838-839 (January 2016): 256–60. http://dx.doi.org/10.4028/www.scientific.net/msf.838-839.256.

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Superplastic deformation behavior was investigated for a dual-phase Mg-Ca alloy. The elongation-to-failure reached more than 120% with the strain rate sensitivity, m, over 0.4. The activation energy required for the deformation was estimated to be 98 kJ/mol which is close to the activation energy for grain boundary diffusion in magnesium. Therefore, the superplastic deformation mechanism was suggested to be the grain boundary sliding rate, which is controlled by boundary diffusion.

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Jassin, E., Mursalim, Salengke, and M. Achmad. "Moisture Diffusivity and Activation Energy on Breadfruit (Artocarpus Altilis) Drying." International Journal of Innovative Science and Research Technology 7, no. 8 (2022): 488–93. https://doi.org/10.5281/zenodo.7028772.

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The diffusivity coefficient can be determined from the dimensional graph of the water content ratio versus time and the water absorption rate using the second law of Fick's diffusion equation. This study uses a heat and mass transfer model based on experimental data's Fick diffusion differential equation. It is desired that these equations can determine the governance of the equation model and the heat and mass transfer transport model and can describe the physical phenomena that occur in the drying process. This study aimed to determine the coefficient of moisture diffusivity and acti

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Malafayev, N., O. Gaponova, and T. Shkolnikova. "COMPARISON OF TEMPERATURE DEPENDENCES OF ACTIVATION ENERGIES FOR FLOW AND DIFFUSION IN PURE WATER." Bulletin of the National Technical University "KhPI". Series: Chemistry, Chemical Technology and Ecology 1, no. 7 (2022): 14–21. http://dx.doi.org/10.20998/2079-0821.2022.02.

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The problems of calculations and the nature of intermolecular interactions forces in liquids, as their activation energies, in a wide range of temperatures of the existence of the liquid phase are considered by example of pure water. The main methodological problem in standard calculations of the activation energy is the lack of conservation of the number of molecules in the system where temperature and pressure changes. The problem is solved by writing down the Arrhenius correlation and calculating the activation energy through the kinematic viscosity, for which the number of molecules in the

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Okubo, Masashi, Yoshinori Tanaka, Haoshen Zhou, Tetsuichi Kudo, and Itaru Honma. "Determination of Activation Energy for Li Ion Diffusion in Electrodes." Journal of Physical Chemistry B 113, no. 9 (2009): 2840–47. http://dx.doi.org/10.1021/jp8099576.

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KOZAKI, Tamotsu, Hiroki SATO, Atsushi FUJISHIMA, Seichi SATO, and Hiroshi OHASHI. "Activation Energy for Diffusion of Cesium in Compacted Sodium Montmorillonite." Journal of Nuclear Science and Technology 33, no. 6 (1996): 522–24. http://dx.doi.org/10.1080/18811248.1996.9731946.

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FACHINI, FERNANDO F. "LARGE-ACTIVATION-ENERGY ASYMPTOTIC ANALYSIS OF MULTICOMPONENT-FUEL DIFFUSION FLAMES." Combustion Science and Technology 177, no. 9 (2005): 1793–811. http://dx.doi.org/10.1080/00102200590959512.

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Vykhodets, V. B., T. E. Kurennykh, A. S. Lakhtin, E. A. Pastukhov, and A. Ya Fishman. "Activation energy of hydrogen, oxygen, and nitrogen diffusion in metals." Doklady Physical Chemistry 401, no. 4-6 (2005): 56–58. http://dx.doi.org/10.1007/s10634-005-0025-4.

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Li, Hai Bin, Qing Xue Huang, Jian Mei Wang, and Qin Ma. "Analysis on Diffusion Parameters of Rolling Mill Bearing Alloy-Interface." Advanced Materials Research 145 (October 2010): 177–80. http://dx.doi.org/10.4028/www.scientific.net/amr.145.177.

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In this paper, the diffusion quantity of different temperatures and unit time have been investigated basing on experimental results and theoretical analysis. The diffusing parameters of molten tin in the reaction process is investigated according to diffusing formula. The results within the range of 260～350°C indicates that the diffusing activation energy is increased with the time until the reaction ceases and it is decreased with the increasing of the temperature and substrate vacancy, but the average diffusing constant of tin increased with the temperature.

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Huang, Change, Chenglei Wang, Hong Tan, et al. "Preparation and dynamic behavior of W-Mo-Y co infiltrated layer on the surface of 45 steel parts." Journal of Physics: Conference Series 2338, no. 1 (2022): 012068. http://dx.doi.org/10.1088/1742-6596/2338/1/012068.

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Abstract In this paper, W-Mo-Y co infiltration were carried out on the surface of 45 steel wedge components by plasma solid-state surface metallurgy technology. The phase, hardness, friction and wear properties before and after W-Mo co infiltration and W-Mo-Y co infiltration were systematically studied. The diffusion kinetics such as diffusion coefficient and diffusion activation energy were calculated by Fick's second diffusion law, and the effect of Y on the diffusion of W and Mo atoms in the infiltrated layer was obtained. It is found that the addition of rare earth Y element increases the

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Wen, J. B., F. X. Chen, Ke Ke Zhang, and Yong Shun Yang. "The Activation Energy of Superplastic Flow above the Critical Temperature for Steel CrWMn." Materials Science Forum 551-552 (July 2007): 341–45. http://dx.doi.org/10.4028/www.scientific.net/msf.551-552.341.

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By means of superplastic tensile test above the Ac1 temperature (γ→α transformation temperature), superplastic deformation activation energy of ultrafine-grained commercial die steel CrWMn is investigated on the basis of the Arrhenius theory equation, exp( / ) 1 ε& = Aσ m −Q RT , which indicates the resistance of the superplastic deformation. According to the Arrhenius equation, the activation energy is estimated from the log σt vs 1/T relationship at a constant of sensitivity index of strain rate. The results show that the strain rate sensitivity index is a constant and rather high at the

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Furuya, Kenji, Tetsuya Hama, Yasuhiro Oba, Akira Kouchi, Naoki Watanabe, and Yuri Aikawa. "Diffusion Activation Energy and Desorption Activation Energy for Astrochemically Relevant Species on Water Ice Show No Clear Relation." Astrophysical Journal Letters 933, no. 1 (2022): L16. http://dx.doi.org/10.3847/2041-8213/ac78e9.

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Abstract The activation energies for desorption (E des) and for surface diffusion (E sd) of adsorbed molecules on dust grains are two of the most important parameters for the chemistry in the interstellar medium. Although E des is often measured by laboratory experiments, the measurement of E sd is sparse. Due to the lack of data, astrochemical models usually assume a simple scaling relation, E sd = f E des, where f is a constant, irrespective of the adsorbed species. Here, we experimentally measure E sd for CH4, H2S, OCS, CH3OH, and CH3CN on water-ice surfaces using an ultrahigh-vacuum transm

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A., Bhattacharyya, K. Mitra M., C. Das G., and Mukherjee S. "Chlorination kinetics of copper oxide and cobalt oxide with amn1onium chloride." Journal of Indian Chemical Society Vol. 79, Oct 2002 (2002): 807–10. https://doi.org/10.5281/zenodo.5847713.

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School of Material Science and Technology, <em><sup>!'</sup></em>Department of Metallurgical Engineering, Jadavpur University, Kolkata-700 032, India <em>E-mail : </em>ab0205 @rediffmail.com          <em>Fax : </em>91-033-4137121 <em>Manuscript received 22 August 2001. revised 19 December 2001, accepted 25 April 2002</em> The kinetics of chlorination of CoO and CuO were studied using thermogravimetric technique. The kinetic results were analyzed by a suitable computer solftware involving various kinetic laws of gas-solid reaction to find the mechanism and acti

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Sudiana, I. Nyoman, Seitaro Mitsudo, Shunsuke Inagaki, La Ode Ngkoimani, Usman Rianse, and Haji Aripin. "Apparent Activation Energy in High Frequency Microwave Sintering of Alumina Ceramic." Advanced Materials Research 1123 (August 2015): 391–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1123.391.

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The observed enhancements in the high frequency microwave processing alumina compared to those in conventional method at the same sintering temperatures have been studied. Some possible mechanisms responsible for the enhancements were investigated and are discussed in this paper. The enhancements could be associated with the increase either in driving force or in apparent activation energy of diffusion. An experiment to estimate the driving force of sintering is not easy to perform because the force depends not only on the density and grain size but also on the electric field in the materials.

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