Al-Cu-Co Single Quasicrystals Obtained by the Method of Inclined Front Crystallisation

Abstract

An Al-Cu-Co alloy was obtained by the inclined front of crystallisation method (IFC). During crystallisation the alloy delaminated into three layers, two of which were single decagonal quasicrystals of different orientations and the third one was a mixture of two phases. The first quasicrystalline layer was formed in a peritectic reaction of an earlier created single crystalline layer of an approximant (phase of the B2 structure), the second - grew directly from liquid. With the use of X-ray topography it was found that the (00001) planes of both quasicrystals are rotated of about 10 against each other.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2001
Accession Number
ADP011873

Entities

People

  • W. Bogdanowicz
  • Z. Bojarski

Organizations

  • University of Silesia in Katowice

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Chemical Composition
  • Chemistry
  • Crystal Structure
  • Crystallization
  • Crystals
  • Diagrams
  • Diffraction
  • Liquid Phases
  • Phase
  • Phase Diagrams
  • Physical Properties
  • Radiation
  • Single Crystals
  • Temperature Gradients
  • Transition Temperature
  • X Rays
  • X-Ray Diffraction

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Geodesy
  • Powder metallurgy of Titanium alloys.