VALAT Pascale

Maître de conférences

CNRS-Université de Poitiers-ISAE ENSMA
11 Boulevard Marie et Pierre Curie
Téléport 2, BP 30179
86962 Futuroscope Cédex
France

Equipe de recherche

Améliorations des propriétés par traitements plasma

Surfaces – Interfaces et Matériaux sous Contrainte – SIMAC

Biographie

Born in 1975, married, three children

Maiden name: VILLAIN

1998 : “Agrégation de Sciences Physiques”, Physics speciality
2002: PhD in Materials Science, University of Poitiers
2004: “Maître de conférences” (lecturer), University of Poitiers

Recherche

Simulated sample of polycystalline tungsten with an average grain diameter of 7 nm.

Analysis of elastic constants in metallic thin films and multilayers combining in situ tensile testing and x-ray diffraction
Atomistic simulation study of elastic constants in nanocrystalline bulk metals and thin films
Keywords:

- Elastic properties
- Size effects
- Metallic thin films, multilayers, small structures
- Atomistic calculations (molecular statics and dynamics with semi-empirical potentials)

Enseignement

General physics
Materials science
In charge of the “Génie des matériaux” licence speciality.

Sélection de publications

”Measuring thin film and multilayer elastic constants by coupling in situ tensile testing with x-ray diffraction”

K.F. Badawi, P. Villain, P. Goudeau, P.-O. Renault

Appl. Phys. Lett., 80, 25 (2002) 4705-4707

“Size effect on intragranular elastic constants in tungsten thin films”

P. Villain, P. Goudeau, P.-O. Renault, K.F. Badawi

Appl. Phys. Lett., 81, 23 (2002) 4365-4367

“X-ray diffraction measurement of the Poisson’s ratio in Mo sublayers of Mo/Ni multilayers”

P. Villain, P.-O. Renault, P. Goudeau, K.F. Badawi

Thin Solid Films 406 (2002) 185-189

“Measurement of the elastic constants of textured anisotropic thin films from x-ray diffraction data”

P.-O. Renault, E. Le Bourhis, P. Villain, P. Goudeau, K.F. Badawi, D. Faurie

Appl. Phys. Lett., 83, 3 (2003) 473-475

“Stress and elastic constant analysis by X-ray diffraction in thin films”

F. Badawi, P. Villain

J. Appl. Crystallography, 36 (2003) 869-879

“X-ray diffraction study of residual stress and microstructure in tungsten thin films sputter-deposited on polyimide”

P. Villain, P. Goudeau, J. Ligot, S. Benayoun, K.F. Badawi, J.-J. Hantzpergue

J. Vac. Sc. Tech. A, 21,4 (2003) 967-972

“Damaging mode study under tensile test of gold thin films on substrates by X-ray diffraction and atomic force microscopy”

P.-O. Renault, P. Villain, C. Coupeau, P. Goudeau, K.F. Badawi

Thin Solid Films, 424, 2 (2003) 267-273

“Elastic constant investigation by x-ray diffraction of in situ deformed metallic multilayers”

P. Goudeau, P. Villain, T. Girardeau, P.-O. Renault, K.F. Badawi

Scripta Mat., 50, 6 (2004) 723-727

“Atomistic calculation of size effects on elastic coefficients in nanometre-sized tungsten layers and wires”

P. Villain, P. Beauchamp, K.F. Badawi, P. Goudeau, P.-O. Renault

Scripta Mat., 50, 9 (2004) 1247-1251

“X-ray diffraction analysis of the structure and residual stresses of W/Cu multilayers”

B. Girault, P. Villain, E. le Bourhis, P. Goudeau, P.O. Renault

Surface and Coatings Tech., 201, 7 (2006) 4372-4376

“Physical origin of spontaneous interfacial alloying in immiscible W/Cu multilayers”

P. Villain, P. Goudeau, F. Badawi, G. Ouyang, G. W. Yang, V. Pélosin

Journal of Materials Science, 42, 17 (2007) 7446-7450