Some aspects of splat-quenching in an inert atmosphere and of the formation of non-crystalline phases in Al-17.3 at. % Cu, ... View Full Text


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Article Info

DATE

1974-05

AUTHORS

H. A. Davies, J. B. Hull

ABSTRACT

An apparatus for splat-quenching by the gun technique in a sealed, inert atmosphere is described. The importance of a low-oxygen quenching atmosphere in promoting efficient spreading of liquid particles and good thermal contact with the quenching surface is shown. A cooling rate of ∼1010 K sec−1 was estimated from the interlamellar spacing in a quenched Al-17.3 at. % Cu alloy. The process mechanisms of the gun technique are discussed with particular reference to the atomized droplet size and the effective specimen thickness for heat transfer.New non-crystalline phases are reported in electron-transparent areas of splat-quenched foils of Al-17.3 at. % Cu (eutectic composition) pure Ge and pure Te. The glassy Al-Cu phase was also observed in specimens which were chemically thinned from the thicker regions of foils; lattice image studies by high-resolution electron microscopy tentatively suggest that this phase has an amorphous, liquid-like atomic configuration. The peak positions in the electron diffraction patterns of the Ge and Te phases were compared, where possible, with those for the corresponding liquid and vapour-deposited phases. The results for Ge suggest that significant structural rearrangement took place during cooling and freezing from the liquid to give a paracrystalline, tetrahedral short-range order whereas, for Te, the liquid structure was probably largely preserved on freezing. More... »

PAGES

707-717

References to SciGraph publications

  • 1972-06. Study of a splat cooled Cu-Zr-noncrystalline phase in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1973-11. Amorphous Nickel produced by Splat Quenching in NATURE
  • 1973-03. Effect of oxygen on structural properties of quenched Ge-Te melts in JOURNAL OF MATERIALS SCIENCE
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf00761790

    DOI

    http://dx.doi.org/10.1007/bf00761790

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1038278346


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