You need JavaScript to view this

The influence of pressure on diffusion leading to intermetallic compounds; Influence de la pression sur les diffusions donnant naissance a des composes intermetalliques

Abstract

Some investigators A.D. LE CLAIRE, J.L. ZAMBROW, L. CASTLEMAN, have shown that the application of uniaxial pressure parallel to the direction of diffusion may notably modify the kinetics of growth of the intermediate phases which can be formed in this direction. The interpretation of this phenomenon being obscure, an attempt is made to explain it by detailed analysis of the experimental facts. The microscopic studies of the kinetics of growth of the zones formed shows particularly in the couples Uranium-Copper and Uranium-Nickel that it is influenced in a similar manner by a uniaxial pressure and a hydrostatic one. On the other hand the rate of growth of these zones increases as a function of the applied pressure in the systems Uranium-Copper, Uranium-Nickel and Uranium-Aluminium (this effect being particularly marked in Uranium-Aluminium). To determine with precision the limits of the range of stability of the intermetallic compounds, the curves of concentration penetration characteristics of the diffusion have been established by means of the CASTAING electronic microanalyser. The examination of the results indicates that when diffusion takes place without external pressure (couples U-Cu and U-Ni) or with a pressure less than 300 kg/cm{sup 2} (couple U-Al) the concentration varies notably in the  More>>
Authors:
Adda, Y; Beyeler, M; Kirianenko, A; Pernot, B [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France).Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1961
Product Type:
Technical Report
Report Number:
CEA-R-1664
Resource Relation:
Other Information: 18 refs
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; COPPER; DIFFUSION LENGTH; INTERMETALLIC COMPOUNDS; LATTICE PARAMETERS; NICKEL; PENETRATION DEPTH; PHASE DIAGRAMS; PHOTOMICROGRAPHY; PRESSURE DEPENDENCE; SELF-DIFFUSION; SOLID SOLUTIONS; STOICHIOMETRY; URANIUM; X-RAY DIFFRACTION
OSTI ID:
20953755
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R1664105036
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
17 pages
Announcement Date:
Dec 21, 2007

Citation Formats

Adda, Y, Beyeler, M, Kirianenko, A, and Pernot, B. The influence of pressure on diffusion leading to intermetallic compounds; Influence de la pression sur les diffusions donnant naissance a des composes intermetalliques. France: N. p., 1961. Web.
Adda, Y, Beyeler, M, Kirianenko, A, & Pernot, B. The influence of pressure on diffusion leading to intermetallic compounds; Influence de la pression sur les diffusions donnant naissance a des composes intermetalliques. France.
Adda, Y, Beyeler, M, Kirianenko, A, and Pernot, B. 1961. "The influence of pressure on diffusion leading to intermetallic compounds; Influence de la pression sur les diffusions donnant naissance a des composes intermetalliques." France.
@misc{etde_20953755,
title = {The influence of pressure on diffusion leading to intermetallic compounds; Influence de la pression sur les diffusions donnant naissance a des composes intermetalliques}
author = {Adda, Y, Beyeler, M, Kirianenko, A, and Pernot, B}
abstractNote = {Some investigators A.D. LE CLAIRE, J.L. ZAMBROW, L. CASTLEMAN, have shown that the application of uniaxial pressure parallel to the direction of diffusion may notably modify the kinetics of growth of the intermediate phases which can be formed in this direction. The interpretation of this phenomenon being obscure, an attempt is made to explain it by detailed analysis of the experimental facts. The microscopic studies of the kinetics of growth of the zones formed shows particularly in the couples Uranium-Copper and Uranium-Nickel that it is influenced in a similar manner by a uniaxial pressure and a hydrostatic one. On the other hand the rate of growth of these zones increases as a function of the applied pressure in the systems Uranium-Copper, Uranium-Nickel and Uranium-Aluminium (this effect being particularly marked in Uranium-Aluminium). To determine with precision the limits of the range of stability of the intermetallic compounds, the curves of concentration penetration characteristics of the diffusion have been established by means of the CASTAING electronic microanalyser. The examination of the results indicates that when diffusion takes place without external pressure (couples U-Cu and U-Ni) or with a pressure less than 300 kg/cm{sup 2} (couple U-Al) the concentration varies notably in the compounds obtained, which theoretically are stoichiometric. Thus, when crossing the zone of diffusion of one base metal to another one notes a continual passage of: UCu{sub 4.70} to UCu{sub 5.25} in the couple U-Cu; UNi{sub 4.75} to UNi{sub 5.25} in the couple U-Ni; UAl{sub 2.2} to UAl{sub 3.3} in the couple U-Al. If an uniaxial or hydrostatic pressure above 500 kg/cm{sup 2} is applied to the couples U-Cu and U-Ni, or above 1000 kg/cm{sup 2} for the couple U-Al, the composition is then constant in the zones formed. It corresponds to: UCu{sub 5} in the couple U-Cu; UNi{sub 5} in the couple U-Ni; UAl{sub 3} in the couple U-Al. These results are confirmed by an X-ray diffraction study, mainly in the U-Cu system. Experiments in progress seem to show that deviation from stoichiometry cannot be observed in alloys prepared by the classical techniques of fusion. (author) [French] Il a ete montre par A.D. LE CLAIRE, J.L. ZAMBROW et L. CASTLEMAN, que l'application d'une pression uniaxiale parallele a la direction de diffusion peut modifier de facon appreciable la cinetique de croissance des phases intermediaires qui peuvent se former dans cette direction. L'interpretation de ce phenomene prete a discussion, et on essaie donc de l'expliquer par une analyse approfondie des donnees experimentales. Il ressort des etudes microscopiques de la cinetique de croissance des zones, particulierement pour les systemes uranium-cuivre et uranium-nickel, que cette croissance est affectee de maniere similaire par une pression uniaxiale ou par une pression hydrostatique. Par contre, la vitesse de croissance de ces zones augmente en fonction de la pression appliquee pour les systemes uranium-cuivre, uranium-nickel et uranium-aluminium (cet effet etant particulierement marque dans le cas d'uranium-aluminium). Afin de determiner avec precision les limites de la gamme de stabilite des composes intermetalliques, les courbes des caracteristiques de concentration et de penetration ont ete etablies au moyen du micro-analyseur electronique de CASTAING. Les resultats montrent que lorsqu'une diffusion a lieu sans pression exterieure (les couples U-Cu et U-Ni) ou avec une pression a 300 kg/cm{sup 2} (le couple U-Al), la concentration varie de facon notable dans les composes obtenus, ceux-ci etant theoriquement stoechiometriques. On retrouve, par exemple, en traversant la zone de diffusion d'un metal a l'autre, les variations continues suivantes: UCu{sub 4,70} a UCu{sub 5.25} dans le couple U-Cu; UNi{sub 4,75} a UNi{sub 5,25} dans le couple U-Ni; UAl{sub 2,2} a UAl{sub 3,3} dans le couple U-Al. Si l'on applique une pression uni-axiale ou hydrostatique de plus de 500 kg/cm{sup 2} pour les couples U-Cu et U-Ni, ou de plus de 1000 kg/cm{sup 2} pour le couple U-Al, on trouve que la composition est constante dans les zone s formees. Celle-ci correspond a: UCu{sub 5} dans le couple U-Cu; UNi{sub 5} dans le couple U-Ni; UAI{sub 3} dans le couple U-Al. Ces resultats sont confirmes par une etude de diffraction aux rayons-X, surtout dans le cas du U-Cu. Des experiences en cours semblent montrer qu'il est impossible d'observer des deviations de stoechiometrie dans les alliages prepares par des methodes classiques. (auteur)}
place = {France}
year = {1961}
month = {Jul}
}