Stability and diffraction features of quasicrystal and 2/1 approximant phase in an Au42In42Yb16 alloy

Alok Singh; J. Q. Guo; A. P. Tsai

doi:10.1016/j.msea.2006.02.297

Stability and diffraction features of quasicrystal and 2/1 approximant phase in an Au₄₂In₄₂Yb₁₆ alloy

Alok Singh, J. Q. Guo, A. P. Tsai

Center for Exploration of New Inorganic Materials

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

An Au₄₂In₄₂Yb₁₆ alloy has been studied by transmission electron microscopy in as-cast and melt-spun conditions. The as-cast alloy was found to contain a cubic 2/1 approximant phase (along with another crystalline phase) with lattice parameter 2.46 nm and space group P a over(3, ̄). Electron diffraction features of this phase have been described. An icosahedral quasicrystal formed on melt-spinning. Differential thermal analysis indicates that the quasicrystalline phase is stable above 525 °C, until melting. Annealing at temperature 550 °C improves the quality of the quasicrystal, while annealing at 450 °C shows transformation to a microcrystalline state. At both temperatures, a 1/1 cubic approximant phase separates out.

Original language	English
Pages (from-to)	991-994
Number of pages	4
Journal	Materials Science and Engineering A
Volume	448-451
DOIs	https://doi.org/10.1016/j.msea.2006.02.297
Publication status	Published - 2007 Mar 25

Keywords

Interfaces
Melting
Nanoparticles
Orientation relationship
Quasicrystal

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Stability and diffraction features of quasicrystal and 2/1 approximant phase in an Au42In42Yb16 alloy",

abstract = "An Au42In42Yb16 alloy has been studied by transmission electron microscopy in as-cast and melt-spun conditions. The as-cast alloy was found to contain a cubic 2/1 approximant phase (along with another crystalline phase) with lattice parameter 2.46 nm and space group P a over(3,{\= }). Electron diffraction features of this phase have been described. An icosahedral quasicrystal formed on melt-spinning. Differential thermal analysis indicates that the quasicrystalline phase is stable above 525 °C, until melting. Annealing at temperature 550 °C improves the quality of the quasicrystal, while annealing at 450 °C shows transformation to a microcrystalline state. At both temperatures, a 1/1 cubic approximant phase separates out.",

keywords = "Interfaces, Melting, Nanoparticles, Orientation relationship, Quasicrystal",

author = "Alok Singh and Guo, {J. Q.} and Tsai, {A. P.}",

note = "Funding Information: Authors are grateful to Dr. H. Takakura for useful discussions. This work is partly supported by Japan Science and Technology Corporation.",

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doi = "10.1016/j.msea.2006.02.297",

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T1 - Stability and diffraction features of quasicrystal and 2/1 approximant phase in an Au42In42Yb16 alloy

AU - Singh, Alok

AU - Guo, J. Q.

AU - Tsai, A. P.

N1 - Funding Information: Authors are grateful to Dr. H. Takakura for useful discussions. This work is partly supported by Japan Science and Technology Corporation.

PY - 2007/3/25

Y1 - 2007/3/25

N2 - An Au42In42Yb16 alloy has been studied by transmission electron microscopy in as-cast and melt-spun conditions. The as-cast alloy was found to contain a cubic 2/1 approximant phase (along with another crystalline phase) with lattice parameter 2.46 nm and space group P a over(3, ̄). Electron diffraction features of this phase have been described. An icosahedral quasicrystal formed on melt-spinning. Differential thermal analysis indicates that the quasicrystalline phase is stable above 525 °C, until melting. Annealing at temperature 550 °C improves the quality of the quasicrystal, while annealing at 450 °C shows transformation to a microcrystalline state. At both temperatures, a 1/1 cubic approximant phase separates out.

AB - An Au42In42Yb16 alloy has been studied by transmission electron microscopy in as-cast and melt-spun conditions. The as-cast alloy was found to contain a cubic 2/1 approximant phase (along with another crystalline phase) with lattice parameter 2.46 nm and space group P a over(3, ̄). Electron diffraction features of this phase have been described. An icosahedral quasicrystal formed on melt-spinning. Differential thermal analysis indicates that the quasicrystalline phase is stable above 525 °C, until melting. Annealing at temperature 550 °C improves the quality of the quasicrystal, while annealing at 450 °C shows transformation to a microcrystalline state. At both temperatures, a 1/1 cubic approximant phase separates out.

KW - Interfaces

KW - Melting

KW - Nanoparticles

KW - Orientation relationship

KW - Quasicrystal

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