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

Mattern, N., Han, J., Pradeep, K. G., Kim, K., Park, E. M., Kim, D., et al. (2014). Structure of rapidly quenched (Cu0.5Zr0.5)100-xAgx alloys (x=0-40 at.%). Journal of Alloys and Compounds, 607, 285-290. doi:10.1016/j.jallcom.2014.04.047.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-001A-10E0-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-A609-8
Genre: Journal Article

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 Creators:
Mattern, Norbert1, Author              
Han, Junhee1, Author              
Pradeep, Konda Gokuldoss2, Author              
Kim, Kangcheol3, Author              
Park, E. M.1, Author              
Kim, Dongha3, Author              
Yokoyama, Yoshihiko4, Author              
Raabe, Dierk2, Author              
Eckert, Jürgen1, Author              
Affiliations:
1IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, 01069 Dresden, Germany, ou_persistent22              
2Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863381              
3Center for Non-crystalline Materials, Yonsei University, 134 Shinchon-dong, Seodaemun-ku, Seoul 120-749, Republic of Korea, ou_persistent22              
4Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan, ou_persistent22              

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 Abstract: The influence of Ag addition on the microstructure of rapidly quenched (Cu0.5Zr0.5)(100-x)Ag-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 Cu40Zr40Ag20. 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 Cu40Zr40Al10Ag10 alloy a homogeneous element distribution is observed in accordance with the microstructure of ternary (Cu0.5Zr0.5)(100-x)Ag-x glasses (x = 10, 20 at.%). (C) 2014 Elsevier B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2014-09-15
 Publication Status: Published in print
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Title: Journal of Alloys and Compounds
Source Genre: Journal
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Publ. Info: Lausanne, Switzerland : Elsevier
Pages: - Volume / Issue: 607 Sequence Number: - Start / End Page: 285 - 290 Identifier: ISSN: 0925-8388
CoNE: /journals/resource/954925567746