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Title: Hydrogen sorption characteristics of nanostructured Pd–10Rh processed by cryomilling

Abstract

Palladium and its alloys are model systems for studying solid-state storage of hydrogen. Mechanical milling is commonly used to process complex powder systems for solid-state hydrogen storage; however, milling can also be used to evolve nanostructured powder to modify hydrogen sorption characteristics. In the present study, cryomilling (mechanical attrition milling in a cryogenic liquid) is used to produce nanostructured palladium-rhodium alloy powder. Characterization of the cryomilled Pd-10Rh using electron microscopy, X-ray diffraction, and surface area analysis reveals that (i) particle morphology evolves from spherical to flattened disk-like particles; while the (ii) crystallite size decreases from several microns to less than 100 nm and (iii) dislocation density increases with increased cryomilling time. Hydrogen absorption and desorption isotherms as well as the time scales for absorption were measured for cryomilled Pd-10Rh, and correlated with observed microstructural changes induced by the cryomilling process. In short, as the microstructure of the Pd-10Rh alloy is refined by cryomilling: (i) the maximum hydrogen concentration in the α-phase increases, (ii) the pressure plateau becomes flatter, and (iii) the equilibrium hydrogen capacity at 760 Torr increases. In addition, the rate of hydrogen absorption was reduced by an order of magnitude compared to non-cryomilled (atomized) powder.

Authors:
 [1];  [2];  [2];  [2];  [1];  [1];  [2];  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Univ. of California, Davis, CA (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1126938
Alternate Identifier(s):
OSTI ID: 1251019
Report Number(s):
SAND-2014-0055J
Journal ID: ISSN 1359-6454; PII: S1359645414006703
Grant/Contract Number:  
AC04-94AL85000; 826008
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 82; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 36 MATERIALS SCIENCE; palladium; hydrogen; cryomilling

Citation Formats

Yang, Nancy, Yee, Joshua K., Zhang, Zhihui, Kurmanaeva, Lilia, Cappillino, Patrick, Stavila, Vitalie, Lavernia, Enrique J., and San Marchi, Chris. Hydrogen sorption characteristics of nanostructured Pd–10Rh processed by cryomilling. United States: N. p., 2014. Web. doi:10.1016/j.actamat.2014.08.056.
Yang, Nancy, Yee, Joshua K., Zhang, Zhihui, Kurmanaeva, Lilia, Cappillino, Patrick, Stavila, Vitalie, Lavernia, Enrique J., & San Marchi, Chris. Hydrogen sorption characteristics of nanostructured Pd–10Rh processed by cryomilling. United States. https://doi.org/10.1016/j.actamat.2014.08.056
Yang, Nancy, Yee, Joshua K., Zhang, Zhihui, Kurmanaeva, Lilia, Cappillino, Patrick, Stavila, Vitalie, Lavernia, Enrique J., and San Marchi, Chris. 2014. "Hydrogen sorption characteristics of nanostructured Pd–10Rh processed by cryomilling". United States. https://doi.org/10.1016/j.actamat.2014.08.056. https://www.osti.gov/servlets/purl/1126938.
@article{osti_1126938,
title = {Hydrogen sorption characteristics of nanostructured Pd–10Rh processed by cryomilling},
author = {Yang, Nancy and Yee, Joshua K. and Zhang, Zhihui and Kurmanaeva, Lilia and Cappillino, Patrick and Stavila, Vitalie and Lavernia, Enrique J. and San Marchi, Chris},
abstractNote = {Palladium and its alloys are model systems for studying solid-state storage of hydrogen. Mechanical milling is commonly used to process complex powder systems for solid-state hydrogen storage; however, milling can also be used to evolve nanostructured powder to modify hydrogen sorption characteristics. In the present study, cryomilling (mechanical attrition milling in a cryogenic liquid) is used to produce nanostructured palladium-rhodium alloy powder. Characterization of the cryomilled Pd-10Rh using electron microscopy, X-ray diffraction, and surface area analysis reveals that (i) particle morphology evolves from spherical to flattened disk-like particles; while the (ii) crystallite size decreases from several microns to less than 100 nm and (iii) dislocation density increases with increased cryomilling time. Hydrogen absorption and desorption isotherms as well as the time scales for absorption were measured for cryomilled Pd-10Rh, and correlated with observed microstructural changes induced by the cryomilling process. In short, as the microstructure of the Pd-10Rh alloy is refined by cryomilling: (i) the maximum hydrogen concentration in the α-phase increases, (ii) the pressure plateau becomes flatter, and (iii) the equilibrium hydrogen capacity at 760 Torr increases. In addition, the rate of hydrogen absorption was reduced by an order of magnitude compared to non-cryomilled (atomized) powder.},
doi = {10.1016/j.actamat.2014.08.056},
url = {https://www.osti.gov/biblio/1126938}, journal = {Acta Materialia},
issn = {1359-6454},
number = C,
volume = 82,
place = {United States},
year = {Fri Oct 03 00:00:00 EDT 2014},
month = {Fri Oct 03 00:00:00 EDT 2014}
}

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Cited by: 9 works
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Works referenced in this record:

Nanocrystalline materials
journal, January 1989


Impact of nanostructuring on the enthalpy of formation of metal hydrides
journal, August 2008


Narrowing of the palladium-hydrogen miscibility gap in nanocrystalline palladium
journal, July 1993


Elastic and tensile behavior of nanocrystalline copper and palladium
journal, October 1997


Bulk nanostructured materials from severe plastic deformation
journal, March 2000


The Art and Science of Tailoring Materials by Nanostructuring for Advanced Properties Using SPD Techniques
journal, August 2010


Bulk Nanostructured Functional Materials By Severe Plastic Deformation
journal, August 2010


Segregation and diffusion of hydrogen in grain boundaries of palladium
journal, February 1987


Hydrogen as a probe for the average thickness of a grain boundary
journal, August 1987


Nanocrystalline metal hydrides
journal, May 1997


Hydrogen storage properties of bulk nanostructured ZK60 Mg alloy processed by Equal Channel Angular Pressing
journal, June 2011


The effect of equal channel angular pressing on hydrogen storage properties of a eutectic Mg–Ni alloy
journal, June 2007


Size effects on the hydrogen storage properties of nanostructured metal hydrides: A review
journal, January 2007


Hydrogen absorption of nanocrystalline palladium
journal, January 2002


Mechanical alloying and milling
journal, January 2001


Nanocrystalline magnesium for hydrogen storage
journal, June 1999


Synergy of hydrogen sorption in ball-milled hydrides of Mg and Mg2Ni
journal, July 1999


Mechanically milled Mg composites for hydrogen storage: the relationship between morphology and kinetics
journal, May 1998


Synthesis of nanocrystalline Zn-22 Pct Al using cryomilling
journal, February 2004


Synthesis and mechanical behavior of nanostructured materials via cryomilling
journal, January 2006


Formation of nanostructure in Al produced by a low-energy ball milling at cryogenic temperature
journal, July 2004


Deformation behavior of bimodal nanostructured 5083 Al alloys
journal, April 2005


Development of nanocrystalline structure during cryomilling of Inconel 625
journal, September 2001


In-situ hydrogen charging of Pd and Pd-Rh in the TEM
journal, August 1997


Strain Energy During Mechanical Milling: Part I. Mathematical Modeling
journal, June 2012


Processing of advanced materials using high-energy mechanical milling
journal, January 2004


Microstructure and mechanical properties of pure Cu processed by high-pressure torsion
journal, December 2008


Plastic strain-induced grain refinement at the nanometer scale in copper
journal, November 2006


A dislocation model for the minimum grain size obtainable by milling
journal, August 2003


Structural and thermodynamic properties of nanocrystalline fcc metals prepared by mechanical attrition
journal, July 1992


The Limits of Refinement by Severe Plastic Deformation
journal, November 2006


The Meaning of Size Obtained from Broadened X-ray Diffraction Peaks
journal, May 2003


Structure characteristics of nanocrystalline element selenium with different grain sizes
journal, December 1997


X-ray line broadening from filed aluminium and wolfram
journal, January 1953


Plastic deformation and hysteresis for hydrogen storage in Pd–Rh alloys
journal, February 2014


Analysis of sloping plateaux in alloys and intermetallic hydrides
journal, December 2004


Analysis of sloping plateaux in alloys and intermetallic hydrides
journal, December 2004


Surface effects in the reaction of H and D with Pd-macroscopic manifestations
journal, August 1991


Hydrogen solubility and diffusivity in defective and amorphous metals
journal, January 1988


The effect of lattice defects on hydrogen solubility in palladium
journal, September 1976


The effect of lattice defects on Hydrogen solubility in palladium
journal, September 1976


Electron microscopy of hydride precipitates in niobium
journal, October 1973


Structure and properties of nanocrystalline materials
journal, August 1994


An in situ study of the hydriding kinetics of Pd thin films
journal, January 2011


Path and mechanism of hydrogen absorption at Pd(100)
journal, April 1998


Works referencing / citing this record:

Thermally stable and strong bulk Mg–MgO in situ nanocomposites by reactive cryomilling and high-pressure consolidation
journal, January 2018