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Nanocrystalline tungsten hydrides at high pressures

DOI: 10.1103/PhysRevB.87.184117 DOI Help

Authors: Thomas Scheler (University of Edinburgh) , Feng Peng (Jilin University) , Christophe L. Guillaume (School of Physics and Centre for Science at Extreme Conditions, The University of Edinburgh) , Ross Howie (University of Edinburgh) , Yanming Ma (Jilin University) , Eugene Gregoryanz (School of Physics and Centre for Science at Extreme Conditions, The University of Edinburgh)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 87 (18)

State: Published (Approved)
Published: May 2013

Abstract: A combined experimental and theoretical study has been carried out on the synthesis and characterization of tungsten hydride at high pressures. We confirm the synthesis of tungsten monohydride at above 25 GPa and 300 K. At higher pressures, hydrogen content is found to increase and ab-initio calculations reveal the formation of overstoichiometric tungsten hydride WHn with n ∼ 1 1 3 . Synchrotron x-ray diffraction and transmission electron microscopy (TEM) measurements demonstrate the formation of a nanocrystalline microstructure upon hydrogenation. TEM micrographs show elongated grains with diameters of ∼20 nm, a structure similar to nanocrystalline diamond.

Journal Keywords: Nanocrystalline Tungsten Hydrides At High Pressures

Subject Areas: Materials, Physics, Technique Development


Instruments: I15-Extreme Conditions

Other Facilities: ID09a at the European Synchrotron Radiation Facility

Added On: 16/08/2013 13:31

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