Characterization of crystalline inclusions in cast bulk Zr-Cu-Ni-Al glassy alloy

Yoshihiko Yokoyama; Takeshi Shinohara; Kenzo Fukaura; Akihisa Inoue

doi:10.2320/matertrans.45.1819

Characterization of crystalline inclusions in cast bulk Zr-Cu-Ni-Al glassy alloy

Yoshihiko Yokoyama, Takeshi Shinohara, Kenzo Fukaura, Akihisa Inoue

Institute for Materials Research (IMR)

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

25 Citations (Scopus)

Abstract

In order to clarify intrinsic features of bulk glassy alloys, the structural control is the most significant factor. However, it is difficult to obtain a single glassy phase by conventional casting methods. Crystalline inclusions in Zr-based bulk glassy alloy are often seen on the fracture surface. Crystalline inclusions are easily formed in molten alloy state by inhomogeneous nucleation or impurities i.e. oxygen, magnesium dichloride and so on. In Zr₅₅Cu₃₀Ni₅Al₁₀ bulk glassy alloy, most of the crystalline inclusions are probably considered as τ₃ type intermetallic compound with typical composition of Zr₅₁Cu ₂₈Al₂₁. The morphology of the crystalline inclusions is changed by the quantity of absorbed oxygen impurities in bulk glassy alloy.

Original language	English
Pages (from-to)	1819-1823
Number of pages	5
Journal	Materials Transactions
Volume	45
Issue number	6
DOIs	https://doi.org/10.2320/matertrans.45.1819
Publication status	Published - 2004 Jun

Keywords

Crystalline inclusion
Solidified morphology
Zirconium-copper-nickel-aluminum alloy system
τ type intermetallic compound

ASJC Scopus subject areas

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

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AU - Fukaura, Kenzo

AU - Inoue, Akihisa

PY - 2004/6

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AB - In order to clarify intrinsic features of bulk glassy alloys, the structural control is the most significant factor. However, it is difficult to obtain a single glassy phase by conventional casting methods. Crystalline inclusions in Zr-based bulk glassy alloy are often seen on the fracture surface. Crystalline inclusions are easily formed in molten alloy state by inhomogeneous nucleation or impurities i.e. oxygen, magnesium dichloride and so on. In Zr55Cu30Ni5Al10 bulk glassy alloy, most of the crystalline inclusions are probably considered as τ3 type intermetallic compound with typical composition of Zr51Cu 28Al21. The morphology of the crystalline inclusions is changed by the quantity of absorbed oxygen impurities in bulk glassy alloy.

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