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Groupe Matériaux Cristallins sous Contrainte "MC2"
Crystalline Materials under Stress.

Crystalline defects and deformation
mechanisms

Elementary mechanisms of plasticity

Small Scale Plasticity

Integrated circuits materials

Microstructures and mechanical
properties of alloys for aeronautic

TiAl alloys

Structural work hardening

Titanium Alloys

Nickel based superalloys

Stress and nanostructuration

Growth mechanism, relaxation,
and self-assemblage

Strain and stress measurement

Size effects in nanometer-sized objects

Metals and nanoalloys

Low dimensional oxides

Elaboration of new materials

New materials by SPS

New materials for energy




Contact :
A. Couret

managers of the MC2 group.
mots-clés :
dislocations, plasticity,
microstructure, growth,
relaxation.

 

 

 

 

 

 

MC2 Group "Crystalline Materials under Stress"
Scientific Objectives

The « Matériaux Cristallins sous Contrainte » (Crystalline materials under stress) group works to uncover the underlying mechanisms involved in strain accommodation and relaxation of materials undergoing internal stresses or submitted to applied external stresses. We aim at studying the influence of these mechanisms on the macroscopic properties which can be mechanical, electronic, optical or magnetic properties, depending on the studied material.

A wide range of materials is investigated, ranging from model materials to materials designed for industrial applications. These latter are either developed in the group using different techniques or processed by collaborating groups or industrial companies.

To reach these objectives, we have developed an approach based on complementary structural, chemical and microstructural analyses coupled with modelling at different scales.





Materials under stress

The applied stresses are either mechanical or thermal ones. The internal stress results from epitaxial growth and/or size effects. A brief presentation of the group activities and how they are distributed into 5 principal axes depending on the nature of stress is sketched below. The different kinds of investigated materials are also reported.

 





Analytical tools

Experimental techniques:
TEM (in situ, HRTEM, CBED, EFTEM, EELS, holographye…)
X-ray (XRD, SAXS, WAXS, EXAFS)
RAMAN spectroscopy and optic
Mechanical tests
Numerical simulations (ab initio, semi-empirical, finite elements)

Synthesis and processing:

Crystallo-chemistry, solid-state chemistry, soft chemistry
Spark Plasma Sintering
Magnetron Sputter deposition

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MC2 Group members

Alain Couret, manager of the MC2 group
Permanent staff :

Magali Benoit (CR)
Daniel Caillard (DR)
Marie-José Casanove (DR)
Nicolas Combe (MC)
Armand Coujou (Pr)
Alain Couret (DR)
François Demangeot (MC)
Mickaël Dollé (CR)
Joël Douin (CR)
Lise Durand (MC)
Jean Galy (DR émérite)
Christophe Gatel (MC)
Yolande Kihn (CR)
Marc Legros (CR)
Colette Levade (MC)
Frédéric Mompiou (CR)
Jean-Philippe Monchoux
Joseph Morillo (Pr)
Florence Pettinari-Sturmel (MC)
Anne Ponchet (CR)
Patrick Rozier (MC)
Christian Roucau (DR)
Hao Tang (CR)
Guy Vanderschaeve (Pr émérite)

PhD students
& Post-Doctorate members :

Anouar Benali
Marie Chassagne
Pierre-Marie Chassaing
Erwan Dumont-Botto
Nathalie Iche-Tarrat
Bouzid Kedjar
Donatien Martineau
Houria Jabbar

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Partnerships



- European Projects:

ESTEEM « Enabling Science and Technology through European Electron Microscopy” (IP3 project within the 6th Framework Programme of the European Commission) (Transnational access and Joint Research Project 5: Lab in a Microscope) (2006-2011)

European Science Foundation Program: “Highly frustrated magnetism” (2005-2010)

- ANR Projects:

SIMDIM « Simulation des Dislocations dans les Materiaux » (programme blanc, 2006-2010)
AMARAGE « Aciers MARtensitiques Alliés de nouvelle GEnération » (programme RNMP-05, 2006-2009)
CONTRA-PRECI "Précipitation, contrainte et transformation de phase" (programme blanc 2006-2008)
CRISTAL "Maîtrise de la structure granulaire des interconnections métalliques des futures générations de circuits intégrés" (programme PNANO 2006-2008).
IRIS “Innovative manufacturing Route for Intermetallic alloys by spark plasma net Shaping
Le frittage flash : une voie innovante pour l’élaboration aux cotes d’alliages intermétalliques »
(programme Matériaux Fonctionnels et Procédés Innovants 2008- 2012)
MEGAPROSE “Metallic GlAsses: PROperties and Size Effects ; Verres Métalliques : Propriétés et effets de taille » (programme jeune chercheur 2008-2012)
CERALION (programme Stockage de l’énergie : ANR-07-Stock-E-04) (2008-2010)

- County Projects:

Projet Midi-Pyrénées – Aquitaine "Drains thermiques adaptatifs cuivre allié/nanofibres de carbone" (2006-2009)
Projet Midi-Pyrénées – Aquitaine SPLASMAP « Spark plasma sintering : mise en œuvre d’un outil innovant pour l’élaboration de matériaux aéronautiques plus performants » (2007 – 2009).
Contrat Region "Fiabilité prédictive des assemblages mécatroniques » (2008-2010)

- Projects of the "Fondation de Recherche pour l’Aéronautique et l’Espace" (FRAE):

PROMITI « Approches multiéchelles des PROpriétés et des MIcrostructures des alliages de TItane ß métastables » (2008-2011)
AMFORTAS "Alliages à Mémoire de Forme pour Technologies Aéronautiques et Spatiales" (2008-2011)

- Industrial Contracts:

Contrat Collaboration avec Freescale jusqu'en 2011

- Other contracts:

Contrat du Ministère Espagnol de la Recherche : Programme de promotion de coopération internationale: MAEC-AECI (Beca del Programa III-B)(2007-2008)

- GDR :

GDR DFT++ (2006-2010)
GDR n° 2772 « Transformations de phases à l’état solide avec diffusion » (2006 – 2010)
GDR n° 3165 « Spark plasma sintering » (2008 – 2012)
GDR Nanoalliages (2008-2012)
GDR Mécano (2008-2012)

 

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