The determination of the solidification paths and the liquidus surface in the quasicrystalline region of the Al-Cu-Ru systems

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Description

Objective is to determine if conventional slow-growth methods will be successful for growing single quasicrystals in this system. Reaction schemes, isopleths, and a ternary liquidus diagram were constructed using DTA, XRD, microscopy, and energy dispersive spectroscopy. Results suggest a peak in the liquidus near the predicted compositions of Al{sub 65}Cu{sub 23}Ru{sub 12} or Al{sub 65}Cu{sub 20}Ru{sub 15} in the face-centered icosahedral phase field. Further study is needed to verify the existence of a congruently melting phase. There appears to be composition for which slow-growth methods will produce a single-quasicrystal. Directional solidification studies were done on 65Al25Cu10Ru.

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51 p.

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Haines, S. December 6, 1995.

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This thesis or dissertation is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 18 times . More information about this document can be viewed below.

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  • Ames Laboratory
    Publisher Info: Ames Lab., IA (United States)
    Place of Publication: Iowa

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Description

Objective is to determine if conventional slow-growth methods will be successful for growing single quasicrystals in this system. Reaction schemes, isopleths, and a ternary liquidus diagram were constructed using DTA, XRD, microscopy, and energy dispersive spectroscopy. Results suggest a peak in the liquidus near the predicted compositions of Al{sub 65}Cu{sub 23}Ru{sub 12} or Al{sub 65}Cu{sub 20}Ru{sub 15} in the face-centered icosahedral phase field. Further study is needed to verify the existence of a congruently melting phase. There appears to be composition for which slow-growth methods will produce a single-quasicrystal. Directional solidification studies were done on 65Al25Cu10Ru.

Physical Description

51 p.

Notes

OSTI as DE96006808

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  • Other Information: TH: Thesis (Ph.D.)

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  • Other: DE96006808
  • Report No.: IS-T--1306
  • Grant Number: W-7405-ENG-82
  • Office of Scientific & Technical Information Report Number: 204668
  • Archival Resource Key: ark:/67531/metadc664718

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  • December 6, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 30, 2015, 7:18 p.m.

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Haines, S. The determination of the solidification paths and the liquidus surface in the quasicrystalline region of the Al-Cu-Ru systems, thesis or dissertation, December 6, 1995; Iowa. (digital.library.unt.edu/ark:/67531/metadc664718/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.