Anvil design for slip-free high pressure deformation experiments in a rotational diamond anvil cell

ABSTRACT

A rotational diamond anvil cell is the most suitable deformation apparatus with which to investigate the rheological properties of deep-Earth materials at pressures similar to those found in the lower mantle and core. However, slip between the sample and piston is still a problem, since the slip prevents the attainment of a constant strain rate and interferes with the uniform deformation of a sample. In this paper, we report that using a diamond anvil with deep grooves results in a marked improvement in the coupling between the sample and the diamond anvils.

KEYWORDS:

• Rotational diamond anvil cell
• deformation experiment
• slip
• high pressure

Acknowledgements

The authors thank S. Karato and S. Merkel for technical advice. The reconstruction program was written by Dr. Masato Hoshino (JASRI/ SPring-8, Japan). The synchrotron radiation experiments were performed at the BL47XU of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2017A1149). This paper presents the results of a joint research program carried out at the Geodynamics Research Center, Ehime University, Japan.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by Japan Society for the Promotion of Science [Grant Numbers JP15H05470, JP15H05829, JP15H05830, JP16J02747].