Diamond anvil cells

Research team: Earth and Planetary Materials.

Contacts: Sébastien MERKEL, Julien CHANTEL.

The diamond anvil cell allows the experimental study of mantle materials and the Earth's core. The sample is compressed between two diamonds having a flat surface with a diameter ranging from 10 to 700 μm. The properties of the sample are then studied by diffraction or spectroscopy. The laboratory has several cells, allowing in-situ experimentation at pressures above the megabar. For temperatures below 1500 K, the sample can be heated using a graphite furnace fitted inside the diamond cell. Samples can also be heated to temperatures of several thousand degrees by focusing on the sample of power lasers (10 to 100W, infra-red). This operation allows the activation of phase transitions with slow kinetics, to relax the constraints within the samples, and to reproduce the conditions of the interior of the planets. The laboratory does not have a laser heating system and we occasionally use assemblies installed in other laboratories or during our in-situ campaigns on large instruments.

Electro-erosion drill

Research team: Earth and Planetary Materials.

Contacts: Sébastien MERKEL, Julien CHANTEL.

Fast, accurate and centered drilling of metal joints used for diamond cell experiments.

Fluorescence and Raman spectroscopy

Research team: Earth and Planetary Materials.

Contacts: Sébastien MERKEL, Julien CHANTEL.

The fluorescence spectrum of the ruby is particularly useful for measuring the pressure applied in a diamond cell. Indeed, the rubies doped with Cr^{3 +} ions emit a spectrum whose lines are shifted with the pressure. Raman spectroscopy probes vibrations in crystals, liquids and glasses. The changes in the spectra induced by the pressure can be interpreted in terms of changes in the arrangement of atoms and the motions of these atoms.

Laser cutting machine

Research team: Earth and Planetary Materials.

Contacts: Julien CHANTEL, Sébastien MERKEL.

Description en Anglais: The system allows for fine preparation of gaskets and samples for diamond anvil cell experiments. Indeed, these experiments require metal drilling for openings with a diameter that can go down to 50 μm. The samples, themselves, of metallic or ceramic nature, have a diameter of between 10 and 30 μm.

Micro digital milling machine

Research team: Earth and Planetary Materials.

Contacts: Julien CHANTEL, Nadège HILAIRET.

This tool allows the production of prototypes or small series of metal or ceramic parts for so-called 'big volume' experiments (piston-cylinder and multi-anvils).

Micro-drill

Research team: Earth and Planetary Materials.

Contacts: Sébastien MERKEL, Julien CHANTEL.

Micromanipulator

Research team: Earth and Planetary Materials.

Contacts: Sébastien MERKEL, Julien CHANTEL.

Microwave welder under neutral atmosphere

Research team: Earth and Planetary Materials.

Contacts: Julien CHANTEL, Nadège HILAIRET.

Multianvil Press

Research team: Earth and Planetary Materials.

Contacts: Julien CHANTEL, Nadège HILAIRET.

Ø This device can generate simultaneously pressures up to 26 GPa and temperatures up to 2000°C on millimetric samples.

The applications of multianvil presses are numerous: synthesis of new materials, studies of phase equilibria, melting curves, crystal transformations, measurement of elastic or electrical properties, etc.

Piston-cylinder press

Research team: Earth and Planetary Materials.

Contacts: Nadège HILAIRET, Julien CHANTEL.

This press, with a solid confinement medium, allows experiments at pressures up to 4 GPa and temperatures of 1800 ° C, on samples pluri-millimeter to centimetric. This device contributes to the synthesis of innovative materials, the production of materials with controlled compositions and microstructures, the synthesis of synthetic rocks and the sintering of natural or synthetic rocks.

Precision tower

Research team: Earth and Planetary Materials.

Contacts: Nadège HILAIRET, Julien CHANTEL.

Ultrasonic wave velocity mesurement setup

Research team: Earth and Planetary Materials.

Contacts: Julien CHANTEL, Sébastien MERKEL.

This setup allows the measurement of elastic properties through ultrasonic wave velocity measurements.

The device is adaptable to the multianvil press, to the piston-cylinder press and to the Paris-Edinburgh type torsion module.

It will therefore allow measurements over the pressure range of 1–25 GPa. The setup consists of an arbitrary function generator (AFG31102), a pre-amplifier, a directional bridge (50 Ohm RF bridge 300kHz to 6GHz) and a digital oscilloscope (MSO54). 

Wire saw

Research team: Earth and Planetary Materials.

Contacts: Nadège HILAIRET, Julien CHANTEL.

Precision cutting (lower than 100 µm) of metals, ceramics and samples without destruction or modification of the material.