The multi-walled carbon nanotube (MWCNT) dispersed polymethylmethacrylate (PMMA) composite membranes have been prepared for hydrogen gas permeation application. Composite membranes are characterized by Raman spectroscopy, optical microscopy, X-ray diffraction, electrical measurements and gas permeability measurements. The effect of electric field alignment of MWCNT in PMMA matrix on gas permeat...

Plasma-driven permeation (PDP) and gas-driven permeation (GDP) through a first wall candidate material F82H have been investigated using a laboratory-scale steady state plasma facility. Experiments indicate that GDP may take place in the opposite direction of PDP, which then results in an unwanted increase in edge plasma density. A hydrogen flow from the plasma side to the gas side has also bee...

Protective ultra-thin barrier lms gather increasing economic interest for controlling permeation and di usion from the biological surrounding in implanted sensor and electronic devices in future medicine. Thus, the aim of this work was the investigation of the lm thickness in uence on the gas permeation barrier of ultra-thin, cytocompatible tetrahedral amorphous carbon (ta-C:H) lms on polyimide...

In an attempt to quantify grain boundary diffusion of hydrogen in nickel, permeation in electrodeposited foil has been investigated. Pinhole-free specimens were plated from a nickel sulfamate bath onto a reusable anodized titanium cathode. The microstructure was a mixture of regions of fine grains (diameters <0.1 tm) and individual grains up to 2 tm in diameter. The specimens were subjected to ...

Diffusion and trapping of hydrogen isotopes in fusion materials need to be fully described order evaluate permeation retention reactors walls breeding blankets. Hydrogen gas experiments have been conducted on Eurofer97 with pressures ranging from 101 105 Pa temperatures between 473 K 673 K, resulting solubility K(T) (mol m−3 Pa−12)= 1.76⋅10−1exp(−0.27(eV)kBT), diffusivity D(T) (m2 s−1) =2.52⋅10...