Application of multichannel diffusion model to analysis of hydrogen measurements in solid

Andronov, D.Yu.; Arseniev, Dmitry G.; Polyanskiy, A. M.; Polyanskiy, Vladimir A.; Yakovlev, Yu. A.

doi:10.1016/j.ijhydene.2016.10.126

Cited by 35 publications

(10 citation statements)

References 33 publications

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“…As one of the most important clean energies, H 2 is widely used in various fields such as fuel cell vehicles, aerospace industry, petrochemical industry, and electronic field [ 1 , 2 , 3 ]. In consideration of the leakage in the applications of H 2 whose explosive limit is very low, it is essential to monitor the state of hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Selective Hydrogen Gas Sensor Using the Mesoporous SnO2 Modified Layers

Xue

Zhang

et al. 2017

Sensors

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It is important to improve the sensitivities and selectivities of metal oxide semiconductor (MOS) gas sensors when they are used to monitor the state of hydrogen in aerospace industry and electronic field. In this paper, the ordered mesoporous SnO2 (m-SnO2) powders were prepared by sol-gel method, and the morphology and structure were characterized by X-ray diffraction analysis (XRD), transmission electron microscope (TEM) and Brunauer–Emmett–Teller (BET). The gas sensors were fabricated using m-SnO2 as the modified layers on the surface of commercial SnO2 (c-SnO2) by screen printing technology, and tested for gas sensing towards ethanol, benzene and hydrogen with operating temperatures ranging from 200 °C to 400 °C. Higher sensitivity was achieved by using the modified m-SnO2 layers on the c-SnO2 gas sensor, and it was found that the S(c/m2) sensor exhibited the highest response (Ra/Rg = 22.2) to 1000 ppm hydrogen at 400 °C. In this paper, the mechanism of the sensitivity and selectivity improvement of the gas sensors is also discussed.

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Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Selective Hydrogen Gas Sensor Using the Mesoporous SnO2 Modified Layers

Xue

Zhang

et al. 2017

Sensors

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“…[39]. Here we considered a symmetrical boundaries with absorption, which is also important for the relaxation in many applications, including spiny dendrites and also for example in application of multichannel diffusion of hydrogen in solids [40].…”

Section: Lmentioning

confidence: 99%

Finite-velocity diffusion on a comb

Sandev

Iomin

2018

EPL

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A Cattaneo equation for a comb structure is considered. We present a rigorous analysis of the obtained fractional diffusion equation, and corresponding solutions for the probability distribution function are obtained in the form of the Fox H-function and its infinite series. The mean square displacement along the backbone is obtained as well in terms of the infinite series of the Fox H-function. The obtained solutions describe the transition from normal diffusion to subdiffusion, which results from the comb geometry.

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“…Согласно стандарту [22], необходимо в течение 96 ч выдерживать образцы в деаэрированном водном рас-творе 5 % по массе NaCl и 0,5 % по массе CH 3 COOH. В процессе проведения теста в растворе соз-дается и поддерживается концентрация 1000 мг/л H 2 S методом барботирования газообразным се-роводородом.…”

Section: методы исследования и экспериментальные результатыunclassified

“…Исследования образцов после стандартного теста на водородное растрескивание ста-лей, согласно стандарту [22], позволили подтвердить гипотезу о том, что микрорастрескива-ние вызывает существенное изменение величины акустической анизотропии [21].…”

Section: методы исследования и экспериментальные результатыunclassified

Boundary layer of hydrogen concentration under plastic deformation

Belyaev¹,

Mansyrev²,

Polyanskiy³

et al. 2017

DREAM

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A new model of instability of uniform plastic deformation with the formation of Lüders bands on the surface of a material being deformed is experimentally confirmed. It has been found that nonuniform plastic deformations correlate with hydrogen concentration during the testing of metal specimens in the atmosphere at room temperature. The presence of additional pores and microcracks formed as a result of plastic deformation is the cause of the correlation between plastic deformations and hydrogen concentrations in aluminum alloys. The effect of the boundary layer in the distribution of hydrogen concentrations has been detected. It reflects the fact that all changes associated with mechanical and thermo-mechanical loading are localized in a thin boundary layer at the surface of a metal specimen. The wave approach to the analysis of the continuum equations and the model of the boundary layer of a bicontinuous medium containing hydrogen are used to describe the observed phenomena. The constructed model makes it possible to describe the development of plastic deformation as a wave process in the boundary layer of a bicontinuous medium. Paris, 1923, vol. 176, pp. 507-510. 4. KeywordsPenning P. Mathematics of the Portevin-Le Chatelier effect. Acta Metallurgica, 1972, vol. 20, no. 10, pp. 1169-1175. DOI: 10.1016.Lebyodkin M., Brechetz Y., Estrin Y., Kubin L. Statistical behaviour and strain localization patterns in the Portevin-Le Chatelier effect. Acta Materialia, 1996, vol. 44, no. 11, pp. 4531-4541. DOI: 10.1016/135900076-6. 6.McCormiсk P.G. A model for the Portevin-Le Chatelier effect in substitutional alloys. Acta Metallurgica, 1972, vol. 20, no. 3, pp. 351-354. DOI: 10.1016 90028-4. 7.Kalk A., Nortmann A., Schwink C. Dynamic strain ageing and the boundaries of stable plastic deformation in Cu-Mn single crystals.

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Application of multichannel diffusion model to analysis of hydrogen measurements in solid

Cited by 35 publications

References 33 publications

Highly Sensitive and Selective Hydrogen Gas Sensor Using the Mesoporous SnO2 Modified Layers

Highly Sensitive and Selective Hydrogen Gas Sensor Using the Mesoporous SnO2 Modified Layers

Finite-velocity diffusion on a comb

Boundary layer of hydrogen concentration under plastic deformation

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