Formation of an icosahedral quasicrystalline phase in Zr65Al7.5Ni10M17.5 (M = Pd, Au or Pt) alloys

Akihisa Inoue; Junji Saida; Mitsuhide Matsushita; Toshio Sakurai

doi:10.2320/matertrans1989.41.362

Formation of an icosahedral quasicrystalline phase in Zr₆₅Al_7.5Ni₁₀M_17.5 (M = Pd, Au or Pt) alloys

Akihisa Inoue, Junji Saida, Mitsuhide Matsushita, Toshio Sakurai

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

79 Citations (Scopus)

Abstract

An icosahedral (I) phase was found to be formed as a metastable phase in the crystallization process of amorphous Zr₆₅Al_7.5Ni₁₀M_17.5 (M = Pd, Au or Pt) alloys. The three amorphous alloys show an endothermic reaction due to the glass transition, followed by two exothermic peaks. The first exothermic peak is due to the precipitation of an I-phase and the second one results from the transition from the I to crystalline mixed phases of Zr₄Al₃ + Zr₂Ni + Zr₂Pd (Zr₂Au or ZrPt). The I-phase consists of fine grains with a size of about 10 nm no distinct residual amorphous phase is seen. The formation of the I-phase in the new Zr-based alloy systems with a large supercooled liquid region and high glass-forming ability is important for the future development of bulk quasicrystalline alloys as basic science and engineering materials.

Original language	English
Pages (from-to)	362-365
Number of pages	4
Journal	Materials Transactions, JIM
Volume	41
Issue number	2
DOIs	https://doi.org/10.2320/matertrans1989.41.362
Publication status	Published - 2000 Feb

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abstract = "An icosahedral (I) phase was found to be formed as a metastable phase in the crystallization process of amorphous Zr65Al7.5Ni10M17.5 (M = Pd, Au or Pt) alloys. The three amorphous alloys show an endothermic reaction due to the glass transition, followed by two exothermic peaks. The first exothermic peak is due to the precipitation of an I-phase and the second one results from the transition from the I to crystalline mixed phases of Zr4Al3 + Zr2Ni + Zr2Pd (Zr2Au or ZrPt). The I-phase consists of fine grains with a size of about 10 nm no distinct residual amorphous phase is seen. The formation of the I-phase in the new Zr-based alloy systems with a large supercooled liquid region and high glass-forming ability is important for the future development of bulk quasicrystalline alloys as basic science and engineering materials.",

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AU - Sakurai, Toshio

PY - 2000/2

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N2 - An icosahedral (I) phase was found to be formed as a metastable phase in the crystallization process of amorphous Zr65Al7.5Ni10M17.5 (M = Pd, Au or Pt) alloys. The three amorphous alloys show an endothermic reaction due to the glass transition, followed by two exothermic peaks. The first exothermic peak is due to the precipitation of an I-phase and the second one results from the transition from the I to crystalline mixed phases of Zr4Al3 + Zr2Ni + Zr2Pd (Zr2Au or ZrPt). The I-phase consists of fine grains with a size of about 10 nm no distinct residual amorphous phase is seen. The formation of the I-phase in the new Zr-based alloy systems with a large supercooled liquid region and high glass-forming ability is important for the future development of bulk quasicrystalline alloys as basic science and engineering materials.

AB - An icosahedral (I) phase was found to be formed as a metastable phase in the crystallization process of amorphous Zr65Al7.5Ni10M17.5 (M = Pd, Au or Pt) alloys. The three amorphous alloys show an endothermic reaction due to the glass transition, followed by two exothermic peaks. The first exothermic peak is due to the precipitation of an I-phase and the second one results from the transition from the I to crystalline mixed phases of Zr4Al3 + Zr2Ni + Zr2Pd (Zr2Au or ZrPt). The I-phase consists of fine grains with a size of about 10 nm no distinct residual amorphous phase is seen. The formation of the I-phase in the new Zr-based alloy systems with a large supercooled liquid region and high glass-forming ability is important for the future development of bulk quasicrystalline alloys as basic science and engineering materials.

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Formation of an icosahedral quasicrystalline phase in Zr₆₅Al_7.5Ni₁₀M_17.5 (M = Pd, Au or Pt) alloys

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