Results 21 to 30 of about 124,157 (162)

Permeability of gas mixtures in glassy polymers with and without plasticization [PDF]

open access: yesJournal of the Serbian Chemical Society, 2021
In this research, the solubility, permeability and diffusivity of gas mixtures through glassy polymers were comprehensively studied. The diffusivity of the components in the mixture was assumed to be a function of the concentration of all components in ...
Saberi Masoud
doaj   +1 more source

Effects of microstructure characteristics on the transverse moisture diffusivity of unidirectional composite

open access: yesScience and Engineering of Composite Materials, 2023
To reveal the effects of the microstructure characteristics including fiber shape, void, fiber distribution pattern, and interphase on the transverse moisture diffusivities of unidirectional composites, the steady analysis method based on Fick’s law is ...
Wang Meng, Hang Xiaochen
doaj   +1 more source

Chemical diffusivity of boron in melts of haplogranitic composition [PDF]

open access: yes, 1993
Chemical diffusivities of B in synthetic melts of haplogranitic composition have been measured by the diffusion couple technique at 1 atm between 1200–1600°C.
Chaussidon, Marc   +2 more
core   +1 more source

The effect of using polypropylene fibers on the durability and fire resistance of concrete

open access: yesFracture and Structural Integrity, 2021
In order to study the effect of polypropylene fibers on the durability of cementitious composites, several experimental tests have been carried out in the laboratory. The composite was tested with different volume fractions of polypropylene fibers (0.05%,
Hassan Suiffi   +3 more
doaj   +1 more source

Influence of the window thermal diffusivity on the silicon wafer temperature in a rapid thermal system [PDF]

open access: yes, 2015
The heating of a silicon wafer in a rapid thermal process is studied by numerical simulation. In the model, the equations of conservation of mass and energy are solved with the finite volume method and the determination of the solutions of the radiative ...
LOGERAIS, Pierre-Olivier   +4 more
core   +1 more source

Thermodynamics And Concentration Fluctuations Of Liquid Al-Cu And Al-Zn Alloys

open access: yesArchives of Metallurgy and Materials, 2015
Thermodynamic properties of liquid Al-Cu and Al-Zn alloys are investigated using the free volume model. We also analyse local atomic arrangements and concentration fluctuations in both liquid binary alloys from the determination of the Warren-Cowley ...
Trybuła M.   +3 more
doaj   +1 more source

Modelling of fission gas release in UO2 doped fuel using transuranus code

open access: yesActa Polytechnica CTU Proceedings, 2022
The expected benefits from Cr-doped fuel are improved retention of fission gases within the pellets due to its large grain size. To demonstrate this, several experiments have been carried out by Halden reactor and Studsvik.
Jheffry Gonzalez, Martin Ševecek
doaj   +1 more source

Dependence of thermal diffusivity on particle size in Au nano-fluid [PDF]

open access: yes, 2010
In this paper we report the measurement of thermal diffusivity of gold nanofluid prepared by γ-radiation with various particle sizes ranging from 7.0 nm to 18.7 nm. The thermal lens technique is used to measure thermal diffusivity of gold nano-fluid.
Mahdi, Mohd Adzir   +7 more
core   +1 more source

A numerical-statistical approach to determining the representative elementary volume (REV) of cement paste for measuring diffusivity

open access: yesMateriales de Construccion, 2010
Concrete diffusivity is a function of its microstructure on many scales, ranging from nanometres to millimetres. Multi-scale techniques are therefore needed to model this parameter.
M. Z. Zhang, G. Ye, K. van Breugel
doaj   +1 more source

Diffusion Properties of Garcinia Fruit Acids (Garcinia atroviridis)

open access: yesWalailak Journal of Science and Technology, 2011
The diffusion properties of garcinia fruit acids (Garcinia atroviridis) were investigated in a batch reactor. The influences of two variables were studied: material thickness and extraction temperature.
Waigoon RITTIRUT, Chairat SIRIPATANA
doaj   +1 more source

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