Nicolas Armaneti2-hmr
Nicolas Armanet
(H in Metals - fundamentals)
Pd-H system
About
17
Publications
3,538
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41
Citations
Introduction
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) my LinkedIn profile https://www.linkedin.com/in/nicolas-armanet-44117195 (ii) institution website https://v1.i2-hmr.com/about-us/members
Publications
Publications (17)
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...
It's the Abstract for the MH-2024 Conference.
Back to the basics, for the future !
If one wants to see future new applications one day (other than H storage) let’s back to the study of basic aspects of M-H systems !
We believe that M-H systems still hide many surprises to come, so that continuing the study of their basics and of their open-questions is PRIMORDIAL. We have created the i2-HMR I...
It was displayed at the bottom of our Poster, in case people don't have time to read it : this piece of paper exhibits a QR-code thanks to which it was possible to download the Poster from its RG (ResearchGate) page.
This abstract (# 47) can be found in the MH-2022 Book of Abstracts (https://www.metal-hydrogen2022.com/book-of-abstracts/) on p. 53.
The Poster (and its related paper) proposes an explanation of why logarithm of the equilibrium pressure of hydride formation (= lnP plateau) linearly depends on the reciprocal temperature (= 1/T) in the Pd-H system. That is to say why the van 't Hoff line is a line* in the range 194.5 <= T <= 565 K. The Ni-H system is also addressed ; the Nb-H syst...
This A4 page was displaced below the Poster (A0), together with the Highlights (A4).
This is the "Highlights" of our Poster https://www.researchgate.net/publication/366894374_Successful_and_Unsuccessful_High-Pressure_Attempts_to_Synthesize_PdHDx_10.
This abstract (# 46) can be found in the MH-2022 book of abstracts (see https://www.metal-hydrogen2022.com/book-of-abstracts/) on p. 52.
This Table (here in Excel format) is that present in the Poster "https://www.researchgate.net/publication/366894374_Successful_and_Unsuccessful_High-Pressure_Attempts_to_Synthesize_PdHDx_10".
This is a call to pursue the search for x > 1.0 (in PdHx) using high pressure (HP) synthesis, as well as a call to reproduce Pd-H SAVs (synthesized by HP) (and solve their crystal structure).
N.B. : note that if you want to download the Poster in PDF format, go to the "More" tab and then click on "Download". Otherwise, if you download the Poster d...
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...
Questions
Question (1)
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.
