Short-range order of Zr62-xTixAl10Cu20 Ni8 bulk metallic glasses

N. Mattern; U. Kühn; H. Hermann; H. Ehrenberg; J. Neuefeind; J. Eckert

doi:10.1016/S1359-6454(01)00341-X

Short-range order of Zr_62-xTi_xAl₁₀Cu₂₀ Ni₈ bulk metallic glasses

N. Mattern, U. Kühn, H. Hermann, H. Ehrenberg, J. Neuefeind, J. Eckert

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

91 Scopus citations

Abstract

The short-range order and crystallization behavior of slowly cooled Zr_62-xTi_xAl₁₀Cu₂₀ Ni₈ bulk metallic glasses have been investigated in terms of the atomic pair correlation function as a function of Ti content x (2≤x≤7.5). The structural parameters point to the presence of chemical short-range order in these bulk glasses. An enhanced local excess free volume around the Ti atoms is concluded from density measurements. The first stage of crystallization in Zr_62-xTi_xAl₁₀Cu₂₀ Ni₈ bulk glasses is related to changes in the medium-range order while the first neighborhood is retained. The atomic pair correlation functions of the first crystallization products are similar for all titanium contents. There is no indication of any special atomic arrangement for the particular alloy forming quasicrystals upon heating (x=3). In case of Zr_54.5Ti_7.5Al₁₀Cu₂₀ Ni₈ an ultrafine microstructure consisting of clusters of 2 nm in size is formed as the first step of crystallization.

Original language	English
Pages (from-to)	305-314
Number of pages	10
Journal	Acta Materialia
Volume	50
Issue number	2
DOIs	https://doi.org/10.1016/S1359-6454(01)00341-X
State	Published - Jan 22 2002
Externally published	Yes

Keywords

Metallic glasses
Order-disorder phenomena
Phase transformations
X-ray diffraction (XRD)

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10.1016/S1359-6454(01)00341-X

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title = "Short-range order of Zr62-xTixAl10Cu20 Ni8 bulk metallic glasses",

abstract = "The short-range order and crystallization behavior of slowly cooled Zr62-xTixAl10Cu20 Ni8 bulk metallic glasses have been investigated in terms of the atomic pair correlation function as a function of Ti content x (2≤x≤7.5). The structural parameters point to the presence of chemical short-range order in these bulk glasses. An enhanced local excess free volume around the Ti atoms is concluded from density measurements. The first stage of crystallization in Zr62-xTixAl10Cu20 Ni8 bulk glasses is related to changes in the medium-range order while the first neighborhood is retained. The atomic pair correlation functions of the first crystallization products are similar for all titanium contents. There is no indication of any special atomic arrangement for the particular alloy forming quasicrystals upon heating (x=3). In case of Zr54.5Ti7.5Al10Cu20 Ni8 an ultrafine microstructure consisting of clusters of 2 nm in size is formed as the first step of crystallization.",

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AU - Mattern, N.

AU - Kühn, U.

AU - Hermann, H.

AU - Ehrenberg, H.

AU - Neuefeind, J.

AU - Eckert, J.

PY - 2002/1/22

Y1 - 2002/1/22

N2 - The short-range order and crystallization behavior of slowly cooled Zr62-xTixAl10Cu20 Ni8 bulk metallic glasses have been investigated in terms of the atomic pair correlation function as a function of Ti content x (2≤x≤7.5). The structural parameters point to the presence of chemical short-range order in these bulk glasses. An enhanced local excess free volume around the Ti atoms is concluded from density measurements. The first stage of crystallization in Zr62-xTixAl10Cu20 Ni8 bulk glasses is related to changes in the medium-range order while the first neighborhood is retained. The atomic pair correlation functions of the first crystallization products are similar for all titanium contents. There is no indication of any special atomic arrangement for the particular alloy forming quasicrystals upon heating (x=3). In case of Zr54.5Ti7.5Al10Cu20 Ni8 an ultrafine microstructure consisting of clusters of 2 nm in size is formed as the first step of crystallization.

AB - The short-range order and crystallization behavior of slowly cooled Zr62-xTixAl10Cu20 Ni8 bulk metallic glasses have been investigated in terms of the atomic pair correlation function as a function of Ti content x (2≤x≤7.5). The structural parameters point to the presence of chemical short-range order in these bulk glasses. An enhanced local excess free volume around the Ti atoms is concluded from density measurements. The first stage of crystallization in Zr62-xTixAl10Cu20 Ni8 bulk glasses is related to changes in the medium-range order while the first neighborhood is retained. The atomic pair correlation functions of the first crystallization products are similar for all titanium contents. There is no indication of any special atomic arrangement for the particular alloy forming quasicrystals upon heating (x=3). In case of Zr54.5Ti7.5Al10Cu20 Ni8 an ultrafine microstructure consisting of clusters of 2 nm in size is formed as the first step of crystallization.

KW - Metallic glasses

KW - Order-disorder phenomena

KW - Phase transformations

KW - X-ray diffraction (XRD)

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ER -

Short-range order of Zr_62-xTi_xAl₁₀Cu₂₀ Ni₈ bulk metallic glasses

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Keywords

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