Influence de l'orientation sur le mode de deformation en traction, à 295 K, de monocristaux de bismuth et d'antimoine

Alcouffe, G.; Mauduit, B. Legros-de; Lafourcade, L.

doi:10.1016/0036-9748(76)90196-4

Scripta Metallurgica

1976

DOI: 10.1016/0036-9748(76)90196-4

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Influence de l'orientation sur le mode de deformation en traction, à 295 K, de monocristaux de bismuth et d'antimoine

G. Alcouffe

B. Legros-de Mauduit

L. Lafourcade

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1979

1986

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Cited by 5 publications

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“…They were thinned by a jet electrolytic polishing and subsequently by a finish electrolytic polishing in a usual way. For the jet polishing, the electrolyte used was concentrated hydrochloric acid 20cm3 plus water 980cm3 saturated with sodium chloride (16) and the applied voltage was 35V, and for the finish polishing methyl alcohol 90cm3 plus concentrated hydrochloric acid 10cm3 (<278K) and 15V. Finally, carbon was evaporated onto both sides of specimens in order to prevent vaporization and de-wetting of the Bi during melting and growth processes.…”

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confidence: 99%

<I>In-situ</I> Observation of Melt Growth Process of Bi (11\bar1) Thin Films by means of Transmission Electron Microscopy

1986

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The dynamic behavior of the solid-liquid interface and crystal defect during the melt growth of a Bi thin foil (99.9% purity) has been observed using a transmission electron microscopy and a TV-VTR imbecame nearly straight when the cooling rate was high. Moreover, three types of the interface movement were observed during the melt growth; (a) a back-and-forth oscillation at the slow cooling rate, (b) a step-wise oscillation at the intermediate cooling rate and (c) a steady advancement at the high cooling rate. The oscillatory interface motion was found to be caused by a small fluctuation of temperatures during cooling. No facet growth was seen at any cooling rate against expectation.In the melt-grown crystals various kinds of defects were observed; (1) short and long dislocations and dislocation loops, (2) lineage defects probably composed of a dislocation array, (3) circular voids and (4) triangular defects unidentified.The formation and behavior of these defects during the melt growth and subsequent cooling processes were explained and their density and size were estimated. Among the defects introduced in crystals the following three were most dominant; short dislocations 0.1

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<I>In-situ</I> Observation of Melt Growth Process of Bi (11\bar1) Thin Films by means of Transmission Electron Microscopy

1986

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Importance of the concept of bond and binding in the physical chemistry of solids

Lafourcade

1981

Int J of Quantum Chemistry

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The nature of problems connected with binding which arise in the everyday work of experimental physicists and material scientists is illustrated by reference to two different experimental studies. (i) Sliding in crystals of group V elements is found to take place not only along planes cutting the quasimetallic bonds, but also along planes apparently cutting their "covalent" bonds, thus suggesting that a more elaborate picture of the two types of bonds and of their interrelation is necessary. (ii) The physisorption of linear pentatriacontane on alkali chlorides indicates alignment of the paraffin molecules along the [ 1 101 directions. This may be associated with polarization of methylene groups by ions in the substrate. This hypothesis must be substantiated by suitable quantum-theoretical calculations, which in turn must be based on an adequate description of the adsorption bond.

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Mise en evidence d'un nouveau systeme de glissement dans l'antimoine deforme en compression

Alcouffe

Sancho

Mauduit

et al. 1979

Scripta Metallurgica

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Influence de l'orientation sur le mode de deformation en traction, à 295 K, de monocristaux de bismuth et d'antimoine

Cited by 5 publications

References 7 publications

<I>In-situ</I> Observation of Melt Growth Process of Bi (11\bar1) Thin Films by means of Transmission Electron Microscopy

<I>In-situ</I> Observation of Melt Growth Process of Bi (11\bar1) Thin Films by means of Transmission Electron Microscopy

Importance of the concept of bond and binding in the physical chemistry of solids

Mise en evidence d'un nouveau systeme de glissement dans l'antimoine deforme en compression

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