Nicolas ArmanetInternational Institute for Hydrogen Materials Research | I2-HMR · Hydrogen in Metals
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My research interest : fundamentals of Metal-Hydrogen (M-H) systems. I'm focused on the Pd-H(D) system and its FCC alloys. Further details : (i) https://www.linkedin.com/in/nicolas-armanet-44117195 (ii) https://v1.i2-hmr.com/about-us/members
A series of hydrogenation/dehydrogenation cycles have been performed on palladium wire samples, stressed by a constant mechanical tension, in order to investigate the changes in electrical and mechanical properties. A large increase of palladium electrical resistivity has been reported due to the combined effects of the production of defects linked...
The strain and the electrical resistivity of a Pd sample stressed by a constant tension have been investigated through a series of hydrogenation cycles in a continuous H stoichiometry [0 x 0.8] range. The isotropic lattice expansion for both "as drawn" and "annealed" Pd sample reveals a strain of only 1% from pure Pd to PdH 0.8 in disagreement with...
The partial atomic volume of hydrogen, vH, is a fundamentally important thermodynamic parameter of interstitial metal hydrides in which dissociated H occupies interstices in the metal lattice. Such an important property should be able to be reliably calculated by a suitable theory or model in order to explain and understand its origin. In practice,...
Palladium hydride alloys are superconductors and hydrogen storage materials. One synthesis route is compression of Pd to high pressure in a hydrogen-rich environment. Here we report the evolution of the unit cell volume of PdHx synthesized by compressing Pd in a pure H2 medium to pressures from 0.2 to 8 GPa in a diamond anvil cell at room temperatu...
This picture is related to : The effect of hydrogenation/dehydrogenation cycles on palladium physical properties, Physics Letter A, 373 (2009) 3101-3108.
Left : virgin Palladium sample (wire, as drawn). Right : the same sample but after 50 cycles (hydrogenation / dehydrogenation), done electrolytically at 25 °C. Unpublished results (in 2009) from : P. Tripodi, N. Armanet, V. Asarisi, A. Avveduto, A. Marmigi, J.D. Vinko, J.-P. Biberian. This picture is linked to : The effect of hydrogenation/dehyd...
This book is not published anymore. The full reference is : "Neutron Scattering from Hydrogen in Materials" ; Proceedings of the second Summer School on Neutron Scattering : Zuoz, Switzerland, 14-20 August 1994 ; A. Furrer (ed.) ; World Scientific Singapore ; 1994. I'm looking for a scanned copy of the whole book. Thanks for your help ! Regards. Nicolas.
Hello, We have important results to be shared during the Conference MH-2018*, and unfortunately, I have no budget (at all) to attend. It is about an old mystery in the field of "H in M" ... maybe about to be unraveled ... All the details are described below in the Project log. If you're willing to support me, please don't hesitate to make a donation. Many thanks for your help ! Yours. Nico. * : MH-2018 is the major Conference in the field of "H in Metals" (M-H). The 16th International Symposium on Metal - Hydrogen systems (MH-2018), will be held in China, in October / November 2018 : http://www.mh2018.cn/dct/page/1
The proposed research framework in hydrogen embrittlement refers to the challenges and most obvious problems of how to link models, phenomenology, and morphology of hydrogen-related failures of industrial components at different scales and how to successfully translate the insights gained into outcomes of practical value to the engineering community. We are looking for partnerships and the formation of an excellent consortium consisting of complementary partners that will help us to retain our competitive edge over the long term.