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Structural study on metal hydrides under high pressure

Inquiry number

SOL-0000001020

Beamline

BL22XU (JAEA Actinide Science I)

Scientific keywords

A. Sample category inorganic material
B. Sample category (detail) metal, alloy
C. Technique X-ray diffraction
D. Technique (detail) powder diffraction
E. Particular condition high pressure (DAC), room temperature
F. Photon energy X-ray (4-40 keV)
G. Target information structural change, phase transition

Industrial keywords

level 1---Application area industrial material
level 2---Target
level 3---Target (detail)
level 4---Obtainable information d-spacing (lattice parameter), crystal structure
level 5---Technique diffraction

Classification

A80.20 metal ・material, M10.20 powder diffraction

Body text

Powder diffraction experiment with a diamond anvil cell is a powerful method for investigating structural property under high pressure. We can obtain high quality diffraction data for a very little sample in a short time by using synchrotron radiation x-ray source. We have been investigating the structural property including phase transition for rare-earth metal hydrides. Figure shows x-ray powder diffraction patterns measured for yttrium tri-hydride at pressures up to 22.6 GPa with helium pressure medium. Yttrium tri-hydride shows a transition from hcp into fcc metal lattice, which starts at about 10 GPa and is completed at 18 GPa.

Figure X-ray diffraction patterns measured for yttrium hydride under high pressure.

Source of the figure

Private communication/others

Description

machida@spring8.or.jp

Technique

Source of the figure

No figure

Required time for experimental setup

8 hour(s)

Instruments

Instrument Purpose Performance
DAC diffractometer Structural study under high pressure at room temperature P<200GPa

References

Related experimental techniques

Questionnaire

This solution is an application of a main instrument of the beamline.

Ease of measurement

Middle

Ease of analysis

Middle

How many shifts were needed for taking whole data in the figure?

Four-nine shifts

Last modified 2019-11-22 09:18