Structure of rapidly quenched (Cu0.5Zr0.5) 100-xAgx alloys (x = 0-40 at.%)

N. Mattern; J. H. Han; K. G. Pradeep; K. C. Kim; E. M. Park; D. H. Kim; Y. Yokoyama; D. Raabe; J. Eckert

doi:10.1016/j.jallcom.2014.04.047

Structure of rapidly quenched (Cu_0.5Zr_0.5) _100-xAg_x alloys (x = 0-40 at.%)

N. Mattern, J. H. Han, K. G. Pradeep, K. C. Kim, E. M. Park, D. H. Kim, Y. Yokoyama, D. Raabe, J. Eckert

Cooperative Research and Development Center for Advanced Materials

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

14 Citations (Scopus)

Abstract

The influence of Ag addition on the microstructure of rapidly quenched (Cu_0.5Zr_0.5)_100-xAg _x melts was investigated (x = 0-40 at.%). Fully glassy alloys were obtained for 0 ≤ x ≤ 20 at.% Ag, which are characterized by a homogeneous microstructure without any indication of phase separation. For 30 ≤ x ≤ 40 at.% Ag a composite structure is formed consisting of fcc-Ag nano-crystallites 5 nm in size and an amorphous matrix phase Cu₄₀Zr₄₀Ag ₂₀. With higher Ag-content the volume fraction of the fcc-Ag phase becomes increased mainly due to crytal growth during quenching. The primary formation of fcc-Ag for 30 ≤ x ≤ 40 at.% Ag is confirmed by the analysis of the microstructure of mold cast bulk samples which were fully crystalline. From the experimental results we conclude that the miscibility gap of the liquid phase of the ternary Ag-Cu-Zr system may occur only for x > 40 at.% Ag. For the bulk glass forming quaternary Cu₄₀Zr₄₀Al ₁₀Ag₁₀ alloy a homogeneous element distribution is observed in accordance with the microstructure of ternary (Cu _0.5Zr_0.5)_100-xAg _x glasses (x = 10, 20 at.%).

Original language	English
Pages (from-to)	285-290
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	607
DOIs	https://doi.org/10.1016/j.jallcom.2014.04.047
Publication status	Published - 2014 Sep 15

Keywords

Ag-Cu-Zr
Atom Probe Tomography
Metallic glass
Phase separation

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2014.04.047

Cite this

@article{0c4e795bb61d403b80132603cdadc5d3,

title = "Structure of rapidly quenched (Cu0.5Zr0.5) 100-xAgx alloys (x = 0-40 at.%)",

abstract = "The influence of Ag addition on the microstructure of rapidly quenched (Cu0.5Zr0.5)100-xAg x melts was investigated (x = 0-40 at.%). Fully glassy alloys were obtained for 0 ≤ x ≤ 20 at.% Ag, which are characterized by a homogeneous microstructure without any indication of phase separation. For 30 ≤ x ≤ 40 at.% Ag a composite structure is formed consisting of fcc-Ag nano-crystallites 5 nm in size and an amorphous matrix phase Cu40Zr40Ag 20. With higher Ag-content the volume fraction of the fcc-Ag phase becomes increased mainly due to crytal growth during quenching. The primary formation of fcc-Ag for 30 ≤ x ≤ 40 at.% Ag is confirmed by the analysis of the microstructure of mold cast bulk samples which were fully crystalline. From the experimental results we conclude that the miscibility gap of the liquid phase of the ternary Ag-Cu-Zr system may occur only for x > 40 at.% Ag. For the bulk glass forming quaternary Cu40Zr40Al 10Ag10 alloy a homogeneous element distribution is observed in accordance with the microstructure of ternary (Cu 0.5Zr0.5)100-xAg x glasses (x = 10, 20 at.%).",

keywords = "Ag-Cu-Zr, Atom Probe Tomography, Metallic glass, Phase separation",

author = "N. Mattern and Han, {J. H.} and Pradeep, {K. G.} and Kim, {K. C.} and Park, {E. M.} and Kim, {D. H.} and Y. Yokoyama and D. Raabe and J. Eckert",

note = "Funding Information: The authors thank B. Bartusch and B. Opitz for technical assistance. Valuable discussions with O. Fabrichnaya and D. Louzguine are gratefully acknowledged. This work was supported by the Global Research Laboratory (GRL) Program of the Korea Ministry of Education, Science and Technology. Financial support of Tohoku University Sendai is acknowledged for research stay at the Institute for Materials Research (N.M.).",

year = "2014",

month = sep,

day = "15",

doi = "10.1016/j.jallcom.2014.04.047",

language = "English",

volume = "607",

pages = "285--290",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Structure of rapidly quenched (Cu0.5Zr0.5) 100-xAgx alloys (x = 0-40 at.%)

AU - Mattern, N.

AU - Han, J. H.

AU - Pradeep, K. G.

AU - Kim, K. C.

AU - Park, E. M.

AU - Kim, D. H.

AU - Yokoyama, Y.

AU - Raabe, D.

AU - Eckert, J.

N1 - Funding Information: The authors thank B. Bartusch and B. Opitz for technical assistance. Valuable discussions with O. Fabrichnaya and D. Louzguine are gratefully acknowledged. This work was supported by the Global Research Laboratory (GRL) Program of the Korea Ministry of Education, Science and Technology. Financial support of Tohoku University Sendai is acknowledged for research stay at the Institute for Materials Research (N.M.).

PY - 2014/9/15

Y1 - 2014/9/15

N2 - The influence of Ag addition on the microstructure of rapidly quenched (Cu0.5Zr0.5)100-xAg x melts was investigated (x = 0-40 at.%). Fully glassy alloys were obtained for 0 ≤ x ≤ 20 at.% Ag, which are characterized by a homogeneous microstructure without any indication of phase separation. For 30 ≤ x ≤ 40 at.% Ag a composite structure is formed consisting of fcc-Ag nano-crystallites 5 nm in size and an amorphous matrix phase Cu40Zr40Ag 20. With higher Ag-content the volume fraction of the fcc-Ag phase becomes increased mainly due to crytal growth during quenching. The primary formation of fcc-Ag for 30 ≤ x ≤ 40 at.% Ag is confirmed by the analysis of the microstructure of mold cast bulk samples which were fully crystalline. From the experimental results we conclude that the miscibility gap of the liquid phase of the ternary Ag-Cu-Zr system may occur only for x > 40 at.% Ag. For the bulk glass forming quaternary Cu40Zr40Al 10Ag10 alloy a homogeneous element distribution is observed in accordance with the microstructure of ternary (Cu 0.5Zr0.5)100-xAg x glasses (x = 10, 20 at.%).

AB - The influence of Ag addition on the microstructure of rapidly quenched (Cu0.5Zr0.5)100-xAg x melts was investigated (x = 0-40 at.%). Fully glassy alloys were obtained for 0 ≤ x ≤ 20 at.% Ag, which are characterized by a homogeneous microstructure without any indication of phase separation. For 30 ≤ x ≤ 40 at.% Ag a composite structure is formed consisting of fcc-Ag nano-crystallites 5 nm in size and an amorphous matrix phase Cu40Zr40Ag 20. With higher Ag-content the volume fraction of the fcc-Ag phase becomes increased mainly due to crytal growth during quenching. The primary formation of fcc-Ag for 30 ≤ x ≤ 40 at.% Ag is confirmed by the analysis of the microstructure of mold cast bulk samples which were fully crystalline. From the experimental results we conclude that the miscibility gap of the liquid phase of the ternary Ag-Cu-Zr system may occur only for x > 40 at.% Ag. For the bulk glass forming quaternary Cu40Zr40Al 10Ag10 alloy a homogeneous element distribution is observed in accordance with the microstructure of ternary (Cu 0.5Zr0.5)100-xAg x glasses (x = 10, 20 at.%).

KW - Ag-Cu-Zr

KW - Atom Probe Tomography

KW - Metallic glass

KW - Phase separation

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U2 - 10.1016/j.jallcom.2014.04.047

DO - 10.1016/j.jallcom.2014.04.047

M3 - Article

AN - SCOPUS:84900411894

VL - 607

SP - 285

EP - 290

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -