# A new compact symmetric rotational diamond anvil cell for in situ high-pressure-torsion studies

Source: [A new compact symmetric rotational diamond anvil cell for in situ high-pressure-torsion studies](<https://www.sota2.com/research/paper/68fa45fd1e209131ce91cf2e>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T05:34:54.642Z

Authors: K. K. Pandey, H. K. Poswal

Published: 2023-12-21T08:03:48.000Z

## Abstract

In situ studies under severe plastic deformation at high pressures, employing rotational/shear diamond anvil cells (RDAC), have recently gained much interest in the high-pressure community owing to their potential applications in material processing methods, mechanochemistry, geophysics, etc. These studies, combined with multi-scale computational simulations, provide important insights into the transient hierarchical microstructural evolution, structural phase transitions, and orientation relationship between parent and daughter phases and help establish the kinetics of strain-induced phase transitions under severe plastic deformation. Existing RDACs are mostly used in axial x-ray diffraction geometry due to geometrical constraints providing less reliable information about stress states and texture. Their asymmetric design also poses serious limitations to high-pressure shear studies on single crystals. To overcome these limitations, a new compact symmetric rotational diamond anvil cell has been designed and developed for in situ high-pressure torsion studies on materials. The symmetric angular opening and short working distance in this new design help obtain a more reliable crystallographic orientation distribution function and lattice strain states up to a large Q range. Here, we present the advantages of the symmetric design with a few demonstrative studies.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2312.13639>)

[PDF](<https://arxiv.org/pdf/2312.13639.pdf>)