Kirkuchi pattern of superalloy Astralloy

Kirkuchi pattern of superalloy Astralloy

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Credit: Y.P. LIN & J.W. STEED, UNIVERSITY OF BRISTOL/SCIENCE PHOTO LIBRARY

Caption: Convergent beam diffraction image, or Kirkuchi pattern, of a particle of gamma phase in the superalloy "Astralloy". The gamma phase gives Astralloy its high-temperature properties. Named for their Japanese inventor, Kirkuchi patterns are uniquely characteristic of a material & can be used to "fingerprint" the smallest of particles in an alloy. The pattern is created in the transmission electron microscope by using a convergent beam of electrons. The number, angles, & arrangement of the lines in the pattern all serve, in this case, to identify the gamma phase. (More information available on request). Ref: MICROCOSMOS, fig. 7.4, page 127

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Keywords: astralloy, astralo, chemical, chemistry, compound, compounds, convergent beam diffraction, electron diffraction, gamma phase, kirkuchi pattern

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