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Philippe Goudeau

Philippe Goudeau
Pprime Institute, UPR3346 CNRS-UP-ENSMA · Physics and Mechanics of Materials - PMM

Dr PhD - HDR

About

291
Publications
30,792
Reads
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4,938
Citations
Additional affiliations
October 1986 - present
French National Centre for Scientific Research
Position
  • Senior Researcher
Description
  • I am research director (DR) at the French National Center for Scientific Research (CNRS). See http://ph.goudeau.free.fr/biography.html

Publications

Publications (291)
Article
Four series of Indium Tin Oxide (ITO) thin films 600 nm thick were deposited on polyimide substrates by Xe ion beam sputtering under different deposition conditions: with or without O2 flow, and at room temperature or 100°C heated substrates. Both electrical and mechanical properties of the four different films were investigated in situ by electric...
Article
Chromium-based alloys have been developed to form chromia layers in oxidizing environments for high temperature applications, providing a good protection against further oxidation. The mechanical behavior and oxide layer growth of yttria-coated or zirconium-doped Ni28Cr alloy are presently studied under high temperature oxidation conditions. These...
Article
The delamination processes occurring in chromia scales formed on Ni-30Cr and Fe-47Cr alloys were studied. Delamination is the result of the competition between growth stresses evolution during heating, thermal stresses during cooling, and stress release phenomena, leading to high residual stress in the oxide film. Delamination in chromia has been f...
Article
An experimental method for a single layer is extended to determine the elastic properties of nanostructured W/Cu multilayers on a flexible substrate. The strain difference between the W/Cu-polyimide-W/Cu composite and the uncoated substrate, measured by dual digital image correlation, allows us to extract the effective Young’s modulus of W/Cu multi...
Article
Full-text available
Compressive residual stresses generated during thin film deposition may lead to undesirable film damage, such as delamination, buckling, and flaking, ultimately leading to the failure of the device employing the film. Understanding the residual stress generation and role in these damage mechanisms is necessary to preserve thin film integrity and op...
Article
Full-text available
Synchrotron Laue microdiffraction scanning is used for the ex situ study of the body-centered, cubic-to-tetragonal phase transformation that occurs in equiatomic polycrystalline Fe-Cr alloys at temperatures between 550 and 800 °C. Grain orientation and grain strains were scanned with a micron step resolution after annealing at 700 °C for 12 h. Furt...
Article
Full-text available
In order to clarify the mechanical features of a metal under thermal cyclic loading for the system Ni30Cr-Cr2O3, a specific study has been carried out. In the present work, the residual stresses in both the metal and the oxide layer have been investigated. An adapted method is applied to process the experimental results that were obtained by using...
Article
The viscoplastic behaviour of the model yttria-coated Ni28Cr alloy was studied under high temperature oxidation conditions for various small quantities of reactive element (RE). The main purpose was to determine the way the RE acts on the non-destructive stress relaxation mechanisms (creep) occurring in thermally grown chromia scales. After buildin...
Article
In oxidizing environments, the protection of metals and alloys against further oxidation at high temperature is provided by the oxide film itself. This protection is efficient only if the formed film adheres well to the metal (substrate), i.e., without microcracks and spalls induced by thermomechanical stresses. In this study, the residual stresses...
Article
Full-text available
In the present work, mechanical features in thermal oxide films growing on metals have been investigated during cyclic thermal loadings. An adapted model is considered to describe the stress evolution within oxide films, taking into account thermomechanical couplings. These numerical predictions are compared with experimental results obtained using...
Article
In this paper, a method to study cyclic deformations is used in a polycrystalline Ni thin film 600. nm thick with a W cap-layer of 20. nm. The Ni/W bilayer film was deposited onto compliant polyimide substrate allowing the film to be subjected to a relatively large tensile applied stress range during loading-unloading of the film/substrate composit...
Article
Full-text available
When metals or alloys are oxidized at high temperature, an oxide film generally develops. Stress induced by oxide growth may influence the structure and the protective properties of the oxide scales. Classical models (taking into account elasticity and/or viscoplasticity and/or thermal mismatches) are able to predict some stress evolution. Moreover...
Article
This work takes place in the general context of a better understanding of materials degradation mechanisms in extreme environments. In particular, the aim of the present study was to correlate microstructural elements to growth stress magnitude evolution and stress release mechanisms for thermally grown chromia thin films on NiCr alloys. Strains in...
Article
A novel experimental approach to study the cyclic plastic deformation of thin metallic films is presented. 300 nm thick Ni films are deposited on both sides of a pre-tensile soft substrate which allows to deform the films alternately in tension and compression (approximately from +2.7 GPa down to −2 GPa) relative to the as-deposited residual stress...
Article
Thin film technology is pervasive in microelectronics, and in optical, magnetic or micro-mechanical devices. The mechanical performance of such nanoscale structure is crucial for applications since it is related to device lifetime. Furthermore, the mechanical behavior of nanostructured materials is still not well known. In this work, nanostructured...
Article
Full-text available
The determination of the state of strain in implantedmaterials is a key issue in the study of their mechanical stability. Whereas this question is nowadays relatively easily solved in the case of single crystals, it remains a challenging task in the case of polycrystallinematerials. In this paper, we take benefit of the intense and parallel beams p...
Article
Full-text available
Archaeological artefacts are often heterogeneous materials where several phases coexist in a wide grain size distribution. Most of the time, retrieving structure information at the micrometre scale is of great importance for these materials. Particularly, the organization of different phases at the micrometre scale is closely related to optical or...
Article
Full-text available
Residual macrostresses in chromia thermal oxide films which develop on a Ni-30Cr alloy have been investigated at room temperature thanks to Raman spectroscopy and X-ray diffraction. Combined with atomic force microscopy on the oxidised surface which gives morphological features at the chromia grain scale, stress release processes in the ceramic fil...
Article
Full-text available
Analytical techniques developed in the field of materials science are now widely applied to objects of art and archaeology to gain information about the material composition and structure and hence to understand the way of manufacturing artefacts. Reciprocally, ancient artefacts studies show potential important contribution in the materials science...
Article
Full-text available
In addition to the red terra sigillata production, the largest Gallic workshop (La Graufesenque) made a special type of terra sigillata, called 'marbled' by the archaeologists. Produced exclusively on this site, this pottery is characterized by a surface finish made of a mixture of yellow and red slips. Because the two slips are intimately mixed, i...
Article
Full-text available
Cet article illustre la mise en oeuvre d'essais biaxiaux de films minces d'´ epaisseur nanométrique sur supports souples (polymères). Une machine biaxiale a ´ eté développée dans ce but et est située au sein de la ligne DiffAbs du synchrotron Soleil. Le chargement de films minces est associéassociéà des techniques de mesure de déformation, comme la...
Article
Full-text available
To understand how the terra sigillata technology was transferred from Italy to Gaul, a large corpus of samples from various worskshop was studied by standard laboratory techniques (Raman spectroscopy, SEM, electron microprobe and colorimetry). Based on these results, a few representative samples were selected and investigated by synchrotron radiati...
Article
Ni-30Cr and Fe-47Cr alloys have been oxidized at 900 and 1000°C in air. The influence of the oxidation and cooling conditions on the magnitude of residual stresses present in the oxide scale as well as the existing relaxation modes are studied. A rigorous determination of the residual stresses at both macroscopic scale in the oxide film adherent to...
Article
Full-text available
Comparative studies of the mechanical behavior between copper, tungsten, and W/Cu nanocomposite based on copper dispersoïd thin films were performed under in-situ controlled tensile equi-biaxial loadings using both synchrotron X-ray diffraction and digital image correlation techniques. The films first deform elastically with the lattice strain equa...
Article
The Smart-Cut technology consists in the increasing of external temperature and pressure imposed by the diffusion of hydrogen ions within silicon substrates leading to a wafer splitting. In the present work, we studied the evolution of the stress field in the crystalline lattice of silicon, the diffusion of hydrogen ions that can lead to the growth...
Article
Synchrotron X-ray diffraction is a powerful tool to analyse the mechanical behavior of multiphase materials due to its selectivity. Simultaneous stress analysis of both phases of a W/Cu thin multilayer has been performed during a continuous biaxial loading on DiffAbs beamline at SOLEIL synchrotron (France). The use of a 2D detector with a large sam...
Article
The GFAC (French Association for residual stress analysis) decided in 2007 to work on external reference samples for residual stress analysis by X-ray diffraction as defined in the XPA 09-285 and EN 15305-2009 standards. Seven materials are studied: ferritic steel, martensitic steel, aluminium alloy, titanium alloy, 2 types of Nickel-Chromium alloy...
Article
Full-text available
According to Cr content, ternary Al1-xCrxNy films structure evolves from hexagonal to cubic phase. Despite numerous studies on their mechanical properties in relation with the deposition process, the relationship between this phase transition and elastic properties has never been deeply studied. In this paper, the transition has been evidenced by p...
Article
To get further insight into Nitrogen stoichiometry influence which is of utmost importance since it influences the phase structure and consequently the mechanical properties of the AlCrN coatings, we carried out a systematically study of AlCrN coatings comprising coatings production, mechanical properties survey, and composition and phase structure...
Data
A biaxial device developed at DiffAbs beamline of the SOLEIL synchrotron facility has been employed to determine the applied strains in film–substrate composites using both X-ray diffraction and digital image correlation measurements. Such an experimental com-bination is used for the first time to determine the yield surface of a polycrystalline th...
Article
Nanostructured tungsten thin films have been obtained by ion beam sputtering technique stopping periodically the growing. The total thickness was maintained constant while nanostructure control was obtained using different stopping periods in order to induce film stratification. The effect of tungsten sublayers' thicknesses on film composition, res...
Article
Aluminum films 150 nm thick have been deposited on polymethylmethacrylate (PMMA) substrates by a magnetron sputtering process. Parallel straight-sided wrinkles are induced by axial compression. The evolution from straight-sided to 'telephone-cord' wrinkles is experimentally investigated using optical microscopy. Finite element modeling of instabili...
Article
This paper reports on the mechanical behaviour of nanostructured W/Cu thin films deposited on Kapton (R) under controlled biaxial loadings thanks to a biaxial testing device developed on DiffAbs beamline at SOLEIL synchrotron (Saint-Aubin, France). In situ tensile tests were carried out combining 2D synchrotron X-ray diffraction (XRD) and digital-i...
Article
Spontaneous delamination process for α-Cr2O3 thermal oxide films growing on NiCr-30 alloys is studied thanks to micro Raman spectroscopy. In particular, stress maps are performed through and around buckles developed on chromia films. Depending on the cooling rate at the end of the oxidation process, different buckle types appear which are investiga...
Article
In this paper, we have compressed a strongly {111}-fiber textured gold film deposited onto a pre-stretched polymer (Kapton) substrate. The elastic strains were measured using an in situ X-ray diffraction technique. We have performed strain analysis for two geometries called longitudinal and transverse. The Neerfeld–Hill model allows capturing with...
Book
This book presents reviews of various aspects of radiation/matter interactions, be these instrumental developments, the application of the study of the interaction of X-rays and materials to a particular scientific field, or specific methodological approaches. The overall aim of the book is to provide reference summaries for a range of specific sub...
Article
In the framework of the study of long-term storage of the spent nuclear fuel, polycrystalline UO2 samples have been implanted with He ions. The thin implanted layer, close to the free surface is subjected to elastic stresses which are studied by x-ray diffraction (micro Laue diffraction) and a mechanical modeling. A simple expression of the displac...
Article
The implantation of He ions in UO 2 polycrystals induces a strain in the implanted layer which can be characterized using Laue micro X-ray diffraction (µ-XRD). The strain tensor resulting from the ion implantation may not be reduced to a single out-of-plane strain component: it also has nonzero shear components. Their strong dependence upon crystal...
Article
An original experimental approach is presented to test under compression ultra-thin films on compliant substrates. The sputtering chamber was modified to permit deposition of the film on an untreated polyimide substrate tensily stressed by a Deben™ device. Exploration of the compression response was made possible with the film being loaded, when un...
Article
Full-text available
A prototype X‐ray pixel area detector (XPAD3.1) has been used for X‐ray diffraction experiments with synchrotron radiation. The characteristics of this detector are very attractive in terms of fast readout time, high dynamic range and high signal‐to‐noise ratio. The prototype XPAD3.1 enabled various diffraction experiments to be performed at differ...
Article
The objective of the present work is to study the elastic behaviour of composites exhibiting strong mechanical contrast components, namely, nanostructured metallic thin films deposited onto polymeric substrates. The stiff film/compliant substrate composites are submitted to complex stress fields during elaboration or applications and the use of a b...
Article
Stress release phenomena are studied for alpha-Cr(2)O(3) thermal oxide films grown on NiCr-30 alloys. The influence of specific metallurgical parameters, such as cooling rate and initial surface roughness, is investigated thanks to Raman spectroscopy. Systematic correlations are established between the residual stress level in the scales and the da...
Article
In situ biaxial tensile tests within the elastic domain were conducted with W/Cu nanocomposite thin films deposited on a polyimide cruciform substrate using a biaxial testing machine developed on the DiffAbs beamline at the Synchrotron SOLEIL. The mechanical behaviour of the nanocomposite was characterized at the micro‐ and macroscales using synchr...
Article
This paper illustrates the insights gained on the mechanical response of metal-coated soft polymer substrates using in-situ tensile testing under synchrotron x-rays. Progress made in external loading (uniaxial and biaxial) and detection capacities is reviewed since they allow scrutinizing multiphased specimens in a reasonable time frame. In general...
Article
A magnetron sputtering system was used to deposit AlCrN thin films. Chemical compositions of the films were determined by both EDXS and RBS, while structures analyses were conducted by XRD in a Seifert XRD3000 diffractometer. Macroscopic residual stresses of films were determined by curvature measurements using DEKTAK IIA profilometer, while in-gra...
Article
We present results of X-ray fluorescence (XRF) microprobe analyses of ancient ceramic cross-sections aiming at deciphering the different firing protocols used for their production. Micro-focused XRF elemental mapping, Fe chemical mapping and Fe K-edge X-ray absorption near edge structure spectroscopy were performed on pre-sigillata ceramics from so...
Article
Amorphous TiO(2) thin films were deposited by means of atomic layer deposition on Kapton substrates and then crystallized ex situ by annealing at 300 degrees C to obtain the anatase phase. The morphology, structure and microstructure of films treated for 12, 24, 72 and 90 h were investigated. The local Ti coordination changes were studied by X-ray...
Article
Full-text available
The anisotropic elastic response of supported thin films with a {111} fiber texture has been studied using an in-situ micro-tensile tester and X-ray diffractometry. It is shown which specific X-ray diffraction measurement geometries can be used to analyze the elastic strains in thin films without requiring any assumptions regarding elastic interact...
Article
We have developed a new methodology to study the effect of mechanical stress on spin waves in thin films deposited onto compliant substrates. It is based on micro-tensile tests combined with Brillouin light-scattering spectroscopy, which allows in situ probing of the magnetization dynamics of the studied film upon deformation. This paper shows from...
Article
Residual stress relaxation in sputtered ZnO films has been studied in-situ by synchrotron x-ray diffraction. The films deposited on (001) Si substrates were thermally treated from 25°C to 700°C. X-ray diffraction 2D patterns were captured continuously during the heating, plateau and cooling ramps. The corrections carried out for compensating the fu...
Article
Morphological and crystallographic structures of multilayered W/Cu nanocomposite thin films elaborated by physical vapor deposition were studied by varying copper and tungsten thicknesses. Sample examinations were performed by x-ray diffraction (XRD), grazing incidence small-angle x-ray scattering and transmission electron microscopy (TEM). Samples...
Article
Understanding the mechanical behaviour of nano-structured thin films in relation to their structure, in particular to the grain size, is of high importance for the development of technological applications. Model nanometric multilayer W/Au systems exhibiting different structures are elaborated. These films are supported by a (thin) polyimide substr...
Article
We have determined residual stresses and the layer microstructure in as-prepared Cu/W multilayers of different periods ranging from 5.2 to 20 nm by both X-ray diffraction and the curvature radius method. The magnitude of the principal in-plane stress is large in the W layers (around - 6 GPa) and small in the Cu layers (-0.5 - + 0.5 GPa). The stress...
Article
"Symmetric" and "asymmetric" x-ray diffraction measurements are proposed as a tool for quantitative and complete determination of the superlattice structure. A general procedure which takes into account the atomic structure of the sublayers as well as structural disorder are presented. The "asymmetric" geometry using the "sin2psi" method is particu...