5 results match your criteria: "UPR 3346 CNRS - Universite de Poitiers - ENSMA[Affiliation]"

Elastic strain mapping of plastically deformed materials by TEM.

Ultramicroscopy

November 2024

Intitut Pprime, Département de Physique et Mécanique des Matériaux, UPR 3346 CNRS - Universite de Poitiers - ENSMA, 11 Bd Marie et Pierre Curie, Site du Futuroscope, TSA 41123, Poitiers 86073 CEDEX 9, France.

A method for mapping elastic strains by TEM in plastically deformed materials is presented. A characteristic feature of plastically deformed materials, which cannot be handled by standard strain measurement method, is the presence of orientation gradients. To circumvent this issue, we couple orientation and strain maps obtained from scanning precession electron diffraction datasets.

View Article and Find Full Text PDF

Measurements in a van der Pauw configuration often require the use of complicated mathematical expressions or implicit relations, which may be computer-time-consuming or tedious to implement in a given software. Thus, a closed-form expression is often desirable. We propose to approximate these relations by closed-form analytical functions using only basic operators that can be easily implemented.

View Article and Find Full Text PDF

A new method of Plasma Immersion Ion Implantation (PIII) and deposition (PIII and D) for treating industrial components in the batch mode has been developed. A metal tubular fixture is used to allocate the components inside, around, and along the tube, exposing only the parts of each component that are to be ion implanted to the plasma. Hollow cathode-like plasma is generated only inside the tube filled with the desired gas, by applying high negative voltage pulses to the hollow cylindrical fixture which is insulated from the vacuum chamber walls.

View Article and Find Full Text PDF

Experimental evidence of Cr magnetic moments at low temperature in Cr2A(A=Al, Ge)C.

J Phys Condens Matter

April 2014

Département de Physique et Mécanique des Matériaux, Institut P' UPR 3346 CNRS - Université de Poitiers - ENSMA, SP2MI, Téléport 2, BP 30179, 86962 Futuroscope, France.

From x-ray magnetic circular dichroism experiments performed at low temperature on Cr2AlC and Cr2GeC thin films, it is evidenced that Cr atoms carry a net magnetic moment in these ternary phases. It is shown that the Cr magnetization of the Al-based compound nearly vanished at 100 K in agreement with what has been recently observed on bulk. X-ray linear dichroism measurements performed at various angles of incidence and temperatures clearly demonstrate the existence of a charge ordering along the c axis of the structure of Cr2AlC.

View Article and Find Full Text PDF