Magnetic susceptibilities and thermal expansion of artificial graphites
Creators
- 1. Commissariat a l'Energie Atomique, Saclay (France).Centre d'Etudes Nucleaires
- 2. Commissariat a l'Energie Atomique, Paris (France)
Description
Starting from measurements of the magnetic susceptibility made in the two principal directions of a graphite bar, the distribution function of the normals to the carbon planes in the crystallites has been evaluated. The effect of different variation in the manufacturing process on this crystalline anisotropy has been studied. From this crystalline anisotropy we have calculated the thermal expansion coefficient possessed by a compact mass of crystallites having exactly the same orientational anisotropy as the porous body consideration. The difference between this and the observed expansion coefficient leads to the determination of the expansion of the non-graphitic part of the mass which turns out to have a negative value and is also anisotropic. We have attempted to draw some conclusions from this result. (author)
Availability note (English)
Available from INIS in electronic formAbstract (French)
En partant des mesures de la susceptibilite magnetique faites dans les directions des axes principaux d'un barreau de graphite, on a calcule la fonction de distribution des perpendiculaires aux plans graphitiques dans les cristallites. On a etudie les effets que pouvaient provoquer des modifications dans le procede de fabrication sur l'anisotropie cristalline. En considerant cette anisotropie cristalline, nous avons calcule le coefficient de dilatation thermique pour un bloc compact de cristallites ayant exactement la meme anisotropie d'orientation que le corps poreux en question. La difference entre cette valeur et celle mesuree du coefficient de dilatation, nous permet de calculer la dilatation pour la partie non-graphitique du bloc, en l'occurence, on trouve une valeur negative du coefficient pour cette partie, qui est egalement anisotropique. On a essaye d'en tirer quelques conclusions. (auteur)Files
38102026.pdf
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Additional details
Additional titles
- Original title (English)
- Susceptibilites magnetiques et dilatation thermique des graphites artificiels
Publishing Information
- Imprint Pagination
- 5 p.
- Report number
- CEA-R--1459
Conference
- Title
- Proceeding of 1957 conference on carbon
- Dates
- 1957
- Place
- Buffalo (United States)
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 38102026
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ANISOTROPY; CARBON BLACK; CARTESIAN COORDINATES; CORRECTIONS; CRYSTAL STRUCTURE; DILATOMETRY; EXTRUSION; FARADAY METHOD; FERROMAGNETIC MATERIALS; GRAPHITE; IMPREGNATION; IMPURITIES; MAGNETIC FIELDS; MAGNETIC SUSCEPTIBILITY; POLYCRYSTALS; TEXTURE; THERMAL EXPANSION
- Descriptors DEC
- CARBON; COORDINATES; CRYSTALS; ELEMENTS; EXPANSION; FABRICATION; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; MATERIALS; MATERIALS WORKING; MINERALS; NONMETALS; PHYSICAL PROPERTIES; THERMAL ANALYSIS
Optional Information
- Notes
- 6 refs.