Auswahl der wissenschaftlichen Literatur zum Thema „Transformations ordre-désordre“
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Zeitschriftenartikel zum Thema "Transformations ordre-désordre":
Backer, H. J., und W. G. Perdok. „Transformations “Ordre-Désordre” dans les Réseaux Cristallins de Molécules Organiques, I. Propriétés physiques des molécules du Cα4, spécialement de C(SCH3)4“. Recueil des Travaux Chimiques des Pays-Bas 62, Nr. 8 (03.09.2010): 533–49. http://dx.doi.org/10.1002/recl.19430620809.
Lock, Margaret. „Les trésors perdus. Ordre/désordre social et récits de révolte des adolescents japonais“. Anthropologie et Sociétés 14, Nr. 3 (10.09.2003): 77–96. http://dx.doi.org/10.7202/015144ar.
Gagnon, Éric. „Interprétation“. Anthropen, 2018. http://dx.doi.org/10.17184/eac.anthropen.066.
Dissertationen zum Thema "Transformations ordre-désordre":
Laamyem, Abdessadeq. „Chloroadamantane-bromoadamantane : deux exemples de transitions de phase ordre-désordre“. Lille 1, 1986. http://www.theses.fr/1986LIL10077.
Stephan, Baptiste. „Etude cinétique et microstructurale de la transformation ordre-désordre dans les alliages Ni2Cr à faible teneur en fer“. Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1R004/document.
Chemical ordering in Ni-Cr alloys modifies their mechanical properties and is a potential issue for their use in pressurized water reactors. In this work, ordering kinetics have been determined by accelerated ageing on model alloys with low iron content. The Ni2Cr ordered phase appearance induces a hardness increase. Furthermore, thermoelectric power measurements have been revealed very sensitive to ordering. The iron content does not affect ordering kinetics at low temperatures (<450 °C), contrary to thermal treatments practiced on the alloys. Our results have been extrapolated to the industrial case, where the iron content is higher: ordering incubation time is estimated at 140 years at 325 °C. The nanometric size of ordered domains together with their small difference in chemical composition with the disordered matrix make their study difficult. We used advance characterizations with transmission electron microscopy to progress in their description. Thanks to the coupling of image analysis with orientation mappings, the surface proportion of ordered domains has been estimated on a control sample. Energy loss chemical maps reveal that the iron is partly segregated around ordered domains. This questions the state of order of the Ni2Cr phase, which is corroborated by quantitative microdiffractions achieved on ordered domains. At the atomic scale, analyzes show that iron substitutes preferentially for chromium in the ordered phase
Stephan, Baptiste. „Etude cinétique et microstructurale de la transformation ordre-désordre dans les alliages Ni2Cr à faible teneur en fer“. Electronic Thesis or Diss., Université de Lille (2018-2021), 2018. http://www.theses.fr/2018LILUR004.
Chemical ordering in Ni-Cr alloys modifies their mechanical properties and is a potential issue for their use in pressurized water reactors. In this work, ordering kinetics have been determined by accelerated ageing on model alloys with low iron content. The Ni2Cr ordered phase appearance induces a hardness increase. Furthermore, thermoelectric power measurements have been revealed very sensitive to ordering. The iron content does not affect ordering kinetics at low temperatures (<450 °C), contrary to thermal treatments practiced on the alloys. Our results have been extrapolated to the industrial case, where the iron content is higher: ordering incubation time is estimated at 140 years at 325 °C. The nanometric size of ordered domains together with their small difference in chemical composition with the disordered matrix make their study difficult. We used advance characterizations with transmission electron microscopy to progress in their description. Thanks to the coupling of image analysis with orientation mappings, the surface proportion of ordered domains has been estimated on a control sample. Energy loss chemical maps reveal that the iron is partly segregated around ordered domains. This questions the state of order of the Ni2Cr phase, which is corroborated by quantitative microdiffractions achieved on ordered domains. At the atomic scale, analyzes show that iron substitutes preferentially for chromium in the ordered phase
Chafi, Allal. „Les phonons : un 'mésoscope' naturel pour l'étude du désordre d'alliage“. Thesis, Metz, 2008. http://www.theses.fr/2008METZ034S/document.
We demonstrate how to overcome serious problems of understanding and classifcation of vibration spectra in semiconductor alloys, following from traditional use of the Virtual Cristal Approximation (VCA). We show that such different systems as InGaAs (1- bond!1-phonon behavior), InGaP (modifed 2-phonon) and ZnTeSe (2-bond 1-phonon) obey, in fact, the same phonon mode behavior, hence probably a universal one, of a percolation type (1-bond!2-phonon, developed in our group). The change of paradigm from the VCA (macroscopic scale) to the Percolation (mesoscopic scale) reveals a specificity of zone-center phonons, that is to provide natural insight into the alloy disorder at the unusual mesoscopic scale. In fact, we introduce a terminology, and say that these phonons behave as a true 'MESOSCOPE'. In particular, this opens up new perspectives for studying the effects of long-range spontaneous organization in mixed crystals, ranging from segregation (InGaP2) to anti-segregation (GaInAsN)
Leduc, François-Xavier. „Etude du processus de mise en ordre des tétratèdres ZnCl4, en corrélation avec la séquence de transitions de phases modulées dans K2ZnCl4“. Lille 1, 1997. http://www.theses.fr/1997LIL10106.
L'observation d'une configuration ordonnée à longue portée des tétraèdres dans les phases désordonnées est l'un des résultats les plus originaux du travail. L'analyse détaillée du profil de la diffusion diffuse a révèlé la mise en ordre locale des tétraèdres à l'intérieur de clusters distribués irrégulièrement au sein d'une matrice ordonnée, dans la phase finale du processus de mise en ordre. Un ordre à longue portée des tétraèdres a été également observé dans les phases désordonnées de Rb2ZnCl4 et Cs2ZnCl4 qui présentent un degré de désordre orientationnel moins élevé que K2ZnCl4. L'arrangement de la configuration ordonnée des tétraèdres est discuté en fonction du degré de désordre des composés, et montre que les effets de volume ne sont pas la seule origine des défauts de structure
Pochet, Pascal. „Etude expérimentale et modélisation des changements de phases sous broyage à haute énergie“. Lille 1, 1997. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1997/50376-1997-37.pdf.
Wang, Yimi. „Modélisation atomique des propriétés thermodynamiques, de la diffusion et de la mise en ordre dans les alliages Fe-Ni“. Electronic Thesis or Diss., Centrale Lille Institut, 2021. http://www.theses.fr/2021CLIL0036.
We present an atomic-scale modeling of thermodynamic properties, diffusion and ordering kinetics in iron-nickel alloys of face-centered cubic structure. The model uses pair interactions that depend on temperature and local composition. These pair interactions are fitted to ab initio calculations at 0 K, and to experimental data at non-zero temperatures. The phase diagram of the system is constructed and compared to the experimental phase diagram. All known experimental diffusion coefficients are well reproduced: self-diffusion, impurity diffusion coefficients in dilute alloys, tracer and interdiffusion coefficients in concentrated alloys. The ordering kinetics in the FeNi3 alloy are studied and compared to available experiments. A good agreement is obtained for the evolution of the long-range order parameter and for the evolution of the size of the ordered domains
Roulin, Gilles. „Etude des premiers stades de mise en ordre dans les alliages martensitiques du système cuivre-aluminium“. Rouen, 1997. http://www.theses.fr/1997ROUES085.
Chbihi, Abdelahad. „Etude de l'effet d'une déformation plastique préalable sur les transformations de phases dans les alliages modèles : CuCr et FePd“. Phd thesis, Rouen, 2011. http://www.theses.fr/2011ROUED005.
The application of severe plastic deformation on metal alloys usually leads to the reduction of the grain size and the formation of a high density of defects (dislocations, vacancies, grain boundaries, etc. ), pushing systems far from thermodynamic equilibrium. This can affect the stability of microstructures and influence the mechanisms of phase transformations. The aim of this work is to understand the effect of prior plastic deformation on two kinds of phase transformations: precipitation and ordering. For this, two model alloys were chosen: CuCr1 and Fe50Pd50 For the CuCr1, the early stages of the Cr precipitation in Cu were first investigated in the undeformed state. Atom Probe Tomography and Transmission Electron Microscopy clearly show the coexistence of three kinds of Cr rich precipitates. Both their structure and composition were investigated in detail. The precipitation kinetic was modeled on the basis of thermodynamic arguments, taking into account the different energy terms, i. E. Driving force, elastic energy and interfacial energy, which come into competition during the Cr precipitation in Cu. The large deformation (by rolling) of the CuCr1 alloy leads to an acceleration of the precipitation kinetic due to the heterogeneous nucleation of Cr precipitates on dislocations. For the Fe50Pd50 alloy, the effect of plastic deformation by High Pressure Torsion on the ordering mechanism was investigated. Transmission Electron Microscopy observations showed that the ordering process in the ultrafine grained state is associated with the recrystallization. The ordered domains nucleate at grain boundaries and grow at the expense of non-recrystallized grains. It should be noted that, a record coercive field was obtained for this alloy in the nanostructured state
Chbihi, Abdelahad. „Etude de l'effet d'une déformation plastique préalable sur les transformations de phases dans les alliages modèles : CuCr et FePd“. Phd thesis, Université de Rouen, 2011. http://tel.archives-ouvertes.fr/tel-00648671.
Bücher zum Thema "Transformations ordre-désordre":
Nabarro, Frank Reginald Nunes. The physics of creep: Creep and creep-resistant alloys. London: Taylor & Francis, 1995.
Srivatsan, T. S., und Manoj Gupta. High Entropy Alloys: Innovations, Advances, and Applications. Taylor & Francis Group, 2020.
Srivatsan, T. S., und Manoj Gupta. High Entropy Alloys: Innovations, Advances, and Applications. Taylor & Francis Group, 2020.
Srivatsan, T. S., und Manoj Gupta. High Entropy Alloys: Innovations, Advances, and Applications. Taylor & Francis Group, 2020.
WUNDERLICH, B. Conformational Motion & Disorder In Low & High Molecular Mass Crystals (Advances in Polymer Science). Springer, 1988.
(Editor), Joe Horton, Ian Baker (Editor), Shuji Hanada (Editor), Ronald D. Noebe (Editor) und Dan S. Schwartz (Editor), Hrsg. High-Temperature Ordered Intermetallic Alloys VI: Symposium Held November 28-December 1, 1994, Boston, Massachusetts, U.S.A. (Materials Research Society Symposium Proceedings). Materials Research Society, 1995.