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Saturation of tungsten surfaces with hydrogen: A density functional theory study complemented by low energy ion scattering and direct recoil spectroscopy data

Journal Article · · Acta Materialia
 [1];  [1];  [1];  [2]
  1. Aix-Marseille Univ., Marseille (France). Lab. PIIM
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Energy Innovation Dept.

In this paper, we investigate the saturation limits of hydrogen on the (110) and (100) surfaces of tungsten via Density Functional Theory (DFT) and complement our findings with experimental measurements. We present a detailed study of the various stable configurations that hydrogen can adopt upon the surfaces at coverage ratios starting below 1.0, up to the point of their experimental coverage ratios, and beyond. We provide the many low-energy configurations that exist at all coverages along with the energy landscape they form. Our findings allow us to estimate that the saturation limit on each surface exists with one monolayer of hydrogen atoms adsorbed. In the case of (110) this corresponds to a coverage ratio of one hydrogen atom per tungsten atom, while in the case of (100) a full monolayer is present at a coverage ratio of 2.0 hydrogen atoms per tungsten atoms. Preliminary Low Energy Ion Scattering (LEIS) and Direct Recoil Spectroscopy (DRS) measurements complement this work on the W(110) surface. These results and some previously published measurements obtained on the W(100) surface confirm the findings obtained by DFT. Finally, in particular, the saturation limits on each surface, the preferred adsorption sites on both surfaces up to saturation, and the reconstruction of the bare and unsaturated (100) surface.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Aix-Marseille Univ., Marseille (France)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE National Nuclear Security Administration (NNSA); European Union (EU); National Agency for Research (ANR) (France)
Grant/Contract Number:
NA0003525
OSTI ID:
1473929
Alternate ID(s):
OSTI ID: 22744440
OSTI ID: 1496397
Report Number(s):
SAND--2018-9888J; 667714
Journal Information:
Acta Materialia, Journal Name: Acta Materialia Vol. 145; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (48)

H on tungsten(110): Studied by angle resolved photoemission and inelastic electron scattering journal June 1982
Two-dimensional phases in chemisorption systems journal February 1983
Impurity effects and temperature dependence of D retention in single crystal tungsten journal March 2003
Deuterium retention in tungsten for fusion use journal October 1998
The adsorption of hydrogen on W(110) and Fe covered W(110) surfaces journal April 1997
Hydrogen diffusion and vacancies formation in tungsten: Density Functional Theory calculations and statistical models journal August 2015
Adsorption and penetration of hydrogen in W: A first principles study journal May 2011
Thermodynamic model for grain boundary effects on hydrogen solubility, diffusivity and permeability in poly-crystalline tungsten journal November 2016
Effect of post-D+-irradiation time delay and pre-TDS heating on D retention in single crystal tungsten journal December 2006
Influence of the microstructure on the deuterium retention in tungsten journal August 2011
Simulation of irradiation induced deuterium trapping in tungsten journal August 2012
Temperature dependence of deuterium retention mechanisms in tungsten journal October 2012
Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry journal August 2015
Plasma-surface interaction in the Be/W environment: Conclusions drawn from the JET-ILW for ITER journal August 2015
Thermodynamics of hydrogen-induced superabundant vacancy in tungsten journal March 2015
Macroscopic rate equation modeling of trapping/detrapping of hydrogen isotopes in tungsten materials journal December 2015
Dynamic fuel retention in tokamak wall materials: An in situ laboratory study of deuterium release from polycrystalline tungsten at room temperature journal December 2015
Experimental determination of the deuterium binding energy with vacancies in tungsten journal August 2016
Theoretical investigation on the point defect formation energies in beryllium and comparison with experiments journal August 2017
A theoretical study of hydrogen adsorption and diffusion on a W(110) surface journal July 2007
Hydrogen adsorption, absorption and diffusion on and in transition metal surfaces: A DFT study journal April 2012
Revisiting the Nonreactive Scattering of N 2 off W(100): On the Influence of the Scattering Azimuth on In-Plane Angular Distributions journal September 2014
Comparative Theoretical Study of H 2 Eley–Rideal Recombination Dynamics on W(100) and W(110) journal May 2014
H 2 Chemisorption on W(100) and W(110) Surfaces journal March 2008
Ion-driven deuterium retention in tungsten journal February 2008
Transport of hydrogen in metals with occupancy dependent trap energies journal October 2014
Theoretical analysis of deuterium retention in tungsten plasma-facing components induced by various traps via thermal desorption spectroscopy journal August 2015
Plasma wall interactions in ITER journal April 2006
Study of hydrogen isotopes behavior in tungsten by a multi trapping macroscopic rate equation model journal January 2016
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials journal September 2009
Critical concentration for hydrogen bubble formation in metals journal September 2014
Ab initio study of tungsten defects near the surface journal March 2016
Soft self-consistent pseudopotentials in a generalized eigenvalue formalism journal April 1990
Ab initio calculations of hydrogen adsorption on (100) surfaces of palladium and rhodium journal July 1994
Substrate and hydrogen phonons of the ordered p (2×1) and (2×2) phase and of the anomalous (1×1) phase of hydrogen on W(110) journal March 1996
First-principles study of H on the reconstructed W(100) surface journal February 2010
Channeling of low-energy ions on hydrogen-covered single-crystal surfaces journal March 2012
Phase Transition on Mo(100) and W(100) Surfaces journal May 1977
Space-Group Determination of the Low-Temperature W { 001 } ( 2 × 2 ) R 45 ° Surface Structure by Low-Energy-Electron Diffraction journal September 1977
Hydrogen on Tungsten(100): Adsorbate-Induced Surface Reconstruction journal November 1978
Hydrogen-Adsorption-Induced Reconstruction of Tungsten (100): Observation of Surface Vibrational Modes journal December 1978
Reconstruction of the W (001) Surface and Its Reordering by Hydrogen Adsorption, Studied by MeV Ion Scattering journal January 1979
Reconstruction of the W(110) surface induced by hydrogen adsorption journal February 1986
Hydrogen-induced phonon anomaly on the W(110) surface journal May 1992
Hydrogen Covered W(110) Surface: A Hydrogen Liquid with a Propensity for One-Dimensional Order journal August 1994
Generalized Gradient Approximation Made Simple journal October 1996
Phonons and related crystal properties from density-functional perturbation theory journal July 2001
Hydrogen in tungsten: Absorption, diffusion, vacancy trapping, and decohesion journal February 2010

Cited By (7)

Stabilization of defects by the presence of hydrogen in tungsten: simultaneous W-ion damaging and D-atom exposure journal November 2018
Energy dissipation to tungsten surfaces upon hot-atom and Eley–Rideal recombination of H 2 journal January 2018
Hydrogen interactions with low-index surface orientations of tungsten journal April 2019
Evaluation of tungsten as divertor plasma-facing material: results from ion irradiation experiments and computer simulations journal June 2019
Surface coverage dependent mechanisms for the absorption and desorption of hydrogen from the W(1 1 0) and W(1 0 0) surfaces: a density functional theory investigation journal August 2019
Experimental characterization of hydrogen adsorption sites for H/W(111) using low energy ion scattering journal December 2019
Fracture ab initio: A force-based scaling law for atomistically informed continuum models journal November 2018

Figures / Tables (9)


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