Phase separation in bulk-type Gd-Zr-Al-Ni metallic glass

S. W. Sohn; W. Yook; W. T. Kim; D. H. Kim

doi:10.1016/j.intermet.2011.12.021

Phase separation in bulk-type Gd-Zr-Al-Ni metallic glass

S. W. Sohn, W. Yook, W. T. Kim, D. H. Kim

Department of Materials Science and Engineering

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

29 Citations (Scopus)

Abstract

Phase separation in bulk-type metallic glass and effect of cooling rate on the phase-separated microstructure have been investigated in Zr ₃₅Gd ₂₀Al _25-xNi _20+x (x = 0, 2, 4, 8) alloys. Among the alloys investigated, molten Zr ₃₅Gd ₂₀Al ₂₃Ni ₂₂ undergoes metastable liquid phase separation in the undercooled regime and subsequently solidifies into two different Zr-rich and Gd-rich amorphous phases, which exhibit enough GFA enabling formation of 1 mm diameter phase-separating glass. The liquid melt undergoes phase separation by spinodal decomposition when the degree of undercooling is relatively large, while by nucleation and growth mechanism when the degree of undercooling is relatively low. The lower degree of undercooling results in the composition more close to the terminal composition expected from the miscibility gap.

Original language	English
Pages (from-to)	57-62
Number of pages	6
Journal	Intermetallics
Volume	23
DOIs	https://doi.org/10.1016/j.intermet.2011.12.021
Publication status	Published - 2012 Apr

Bibliographical note

Funding Information:
This work was supported by the Global Research Laboratory Program of the Korea Ministry of Education, Science and Technology. S.W. Sohn acknowledge the support from the Second Stage of Brain Korea 21 Project in 2011. Stimulating discussions with J.H. Han, N. Mattern, O. Shuleshova, J. M. Park and J. Eckert are gratefully acknowledged.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.intermet.2011.12.021

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title = "Phase separation in bulk-type Gd-Zr-Al-Ni metallic glass",

abstract = "Phase separation in bulk-type metallic glass and effect of cooling rate on the phase-separated microstructure have been investigated in Zr 35Gd 20Al 25-xNi 20+x (x = 0, 2, 4, 8) alloys. Among the alloys investigated, molten Zr 35Gd 20Al 23Ni 22 undergoes metastable liquid phase separation in the undercooled regime and subsequently solidifies into two different Zr-rich and Gd-rich amorphous phases, which exhibit enough GFA enabling formation of 1 mm diameter phase-separating glass. The liquid melt undergoes phase separation by spinodal decomposition when the degree of undercooling is relatively large, while by nucleation and growth mechanism when the degree of undercooling is relatively low. The lower degree of undercooling results in the composition more close to the terminal composition expected from the miscibility gap.",

author = "Sohn, {S. W.} and W. Yook and Kim, {W. T.} and Kim, {D. H.}",

note = "Funding Information: This work was supported by the Global Research Laboratory Program of the Korea Ministry of Education, Science and Technology. S.W. Sohn acknowledge the support from the Second Stage of Brain Korea 21 Project in 2011. Stimulating discussions with J.H. Han, N. Mattern, O. Shuleshova, J. M. Park and J. Eckert are gratefully acknowledged.",

year = "2012",

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doi = "10.1016/j.intermet.2011.12.021",

language = "English",

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journal = "Intermetallics",

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AU - Sohn, S. W.

AU - Yook, W.

AU - Kim, W. T.

AU - Kim, D. H.

N1 - Funding Information: This work was supported by the Global Research Laboratory Program of the Korea Ministry of Education, Science and Technology. S.W. Sohn acknowledge the support from the Second Stage of Brain Korea 21 Project in 2011. Stimulating discussions with J.H. Han, N. Mattern, O. Shuleshova, J. M. Park and J. Eckert are gratefully acknowledged.

PY - 2012/4

Y1 - 2012/4

N2 - Phase separation in bulk-type metallic glass and effect of cooling rate on the phase-separated microstructure have been investigated in Zr 35Gd 20Al 25-xNi 20+x (x = 0, 2, 4, 8) alloys. Among the alloys investigated, molten Zr 35Gd 20Al 23Ni 22 undergoes metastable liquid phase separation in the undercooled regime and subsequently solidifies into two different Zr-rich and Gd-rich amorphous phases, which exhibit enough GFA enabling formation of 1 mm diameter phase-separating glass. The liquid melt undergoes phase separation by spinodal decomposition when the degree of undercooling is relatively large, while by nucleation and growth mechanism when the degree of undercooling is relatively low. The lower degree of undercooling results in the composition more close to the terminal composition expected from the miscibility gap.

AB - Phase separation in bulk-type metallic glass and effect of cooling rate on the phase-separated microstructure have been investigated in Zr 35Gd 20Al 25-xNi 20+x (x = 0, 2, 4, 8) alloys. Among the alloys investigated, molten Zr 35Gd 20Al 23Ni 22 undergoes metastable liquid phase separation in the undercooled regime and subsequently solidifies into two different Zr-rich and Gd-rich amorphous phases, which exhibit enough GFA enabling formation of 1 mm diameter phase-separating glass. The liquid melt undergoes phase separation by spinodal decomposition when the degree of undercooling is relatively large, while by nucleation and growth mechanism when the degree of undercooling is relatively low. The lower degree of undercooling results in the composition more close to the terminal composition expected from the miscibility gap.

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JO - Intermetallics

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ER -

Phase separation in bulk-type Gd-Zr-Al-Ni metallic glass

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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