You are here

Pressure Self-focusing Effect and Novel Methods for Increasing the Maximum Pressure in Traditional and Rotational Diamond Anvil Cells

TitlePressure Self-focusing Effect and Novel Methods for Increasing the Maximum Pressure in Traditional and Rotational Diamond Anvil Cells
Publication TypeJournal Article
Year of Publication2017
AuthorsFeng, B, Levitas, VI
JournalScientific Reports
Volume7
Pagination45461
Date Published04
Type of ArticleArticle
ISBN Number2045-2322
Accession NumberWOS:000399985200001
Keywordscompression, deformation, mbar, megabar pressures, strain, stress, Technology - Other Topics
Abstract

The main principles of producing a region near the center of a sample, compressed in a diamond anvil cell (DAC), with a very high pressure gradient and, consequently, with high pressure are predicted theoretically. The revealed phenomenon of generating extremely high pressure gradient is called the pressure self-focusing effect. Initial analytical predictions utilized generalization of a simplified equilibrium equation. Then, the results are refined using our recent advanced model for elastoplastic material under high pressures in finite element method (FEM) simulations. The main points in producing the pressure self-focusing effect are to use beveled anvils and reach a very thin sample thickness at the center. We find that the superposition of torsion in a rotational DAC (RDAC) offers drastic enhancement of the pressure self-focusing effect and allows one to reach the same pressure under a much lower force and deformation of anvils.

DOI10.1038/srep45461
Custom 1

Not AL

Alternate JournalSci Rep