High pressure phase transformations in neodymium studied in a diamond anvil cell using diamond-coated rhenium gaskets

Diamond anvil cells are used to generate high static pressures up to several megabars (hundreds of GPa) in very small volumes of material. We have explored a technique which employs a microwave plasma chemical vapor deposited diamond layer on one side of the rhenium gasket. The high yield strength o...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Condensed matter 1999-08, Vol.11 (34), p.6515-6520
Main Authors: Akella, Jagannadham, Weir, Samuel T, Vohra, Yogesh K, Prokop, Heather, Catledge, Shane A, Chesnut, Gary N
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Crystallographic aspects of phase transformations
pressure effects
Exact sciences and technology
Metals. Metallurgy
Physics
Structure of solids and liquids
crystallography
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Diamond anvil cells are used to generate high static pressures up to several megabars (hundreds of GPa) in very small volumes of material. We have explored a technique which employs a microwave plasma chemical vapor deposited diamond layer on one side of the rhenium gasket. The high yield strength of the diamond layer prevents excessive thickness reduction of the sample in the gasket hole. As a test case, we show energy dispersive x-ray diffraction data on rare earth metal neodymium to high pressures of 153 GPa using a synchrotron source. The increased sample thickness results in an unambiguous crystal structure determination of a monoclinic phase in neodymium above 75 GPa.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/11/34/303