A bridge from monotectic alloys to liquid-phase-separated bulk metallic glasses: Design, microstructure and phase evolution

J. He; N. Mattern; J. Tan; J. Z. Zhao; I. Kaban; Z. Wang; L. Ratke; D. H. Kim; W. T. Kim; J. Eckert

doi:10.1016/j.actamat.2012.12.031

A bridge from monotectic alloys to liquid-phase-separated bulk metallic glasses: Design, microstructure and phase evolution

J. He, N. Mattern, J. Tan, J. Z. Zhao, I. Kaban, Z. Wang, L. Ratke, D. H. Kim, W. T. Kim, J. Eckert

Department of Materials Science and Engineering

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

62 Citations (Scopus)

Abstract

The Zr-Ce-La system is characterized by a miscibility gap and a monotectic reaction. It separates into Zr-rich and CeLa-rich liquids upon cooling through the gap. Based on this system, a new Zr-Ce-La-Al-Co monotectic system was created to synthesize liquid-phase-separated bulk metallic glasses (LPS-BMGs) by copper mold casting. A systematical investigation was performed for the effects of the relative atomic ratios of Zr:CeLa, Co:Al and Ce:La on the microstructure features and chemical compositions of the two coexistent phases. Dual atom pairs with positive heat of mixing (Zr-Ce: +12 kJ mol^-1 and Zr-La: +13 kJ mol^-1) are originally adopted to develop such LPS-BMGs. A series of in situ formed LPS-BMGs with a critical thickness of 2.5 mm has been successfully synthesized. By combining the kinetics of liquid-liquid phase separation with the formation of metallic glasses, the mechanisms of phase formation and the microstructure evolution in the rapidly cooled alloys are discussed in detail. Furthermore, a thermodynamic model is proposed for LPS-BMG design, attempting to build a bridge from monotectic/immiscible (M/I) alloys to LPS-BMGs. This work not only provides opportunities for new insights into the synthesis of LPS-BMGs and their properties but also opens new perspectives for processing and research of M/I alloys.

Original language	English
Pages (from-to)	2102-2112
Number of pages	11
Journal	Acta Materialia
Volume	61
Issue number	6
DOIs	https://doi.org/10.1016/j.actamat.2012.12.031
Publication status	Published - 2013 Apr

Bibliographical note

Funding Information:
The authors thank B. Bartusch, S. Donath, M. Frey, B. Opitz and H.X. Jiang for technical support. Helpful discussions with Prof. F.P. Dai, Dr. Y. Zhang, Dr. B.A. Sun and K.K. Song are gratefully acknowledged. Support from the Alexander von Humboldt Foundation, the National Natural Science Foundation (NNSF) of China (Grant No. 51271185 , 51031003 , 51071159 ), and the Global Research Laboratory Program of the Korean Ministry of Education, Science and Technology is gratefully acknowledged.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2012.12.031

Cite this

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title = "A bridge from monotectic alloys to liquid-phase-separated bulk metallic glasses: Design, microstructure and phase evolution",

abstract = "The Zr-Ce-La system is characterized by a miscibility gap and a monotectic reaction. It separates into Zr-rich and CeLa-rich liquids upon cooling through the gap. Based on this system, a new Zr-Ce-La-Al-Co monotectic system was created to synthesize liquid-phase-separated bulk metallic glasses (LPS-BMGs) by copper mold casting. A systematical investigation was performed for the effects of the relative atomic ratios of Zr:CeLa, Co:Al and Ce:La on the microstructure features and chemical compositions of the two coexistent phases. Dual atom pairs with positive heat of mixing (Zr-Ce: +12 kJ mol-1 and Zr-La: +13 kJ mol-1) are originally adopted to develop such LPS-BMGs. A series of in situ formed LPS-BMGs with a critical thickness of 2.5 mm has been successfully synthesized. By combining the kinetics of liquid-liquid phase separation with the formation of metallic glasses, the mechanisms of phase formation and the microstructure evolution in the rapidly cooled alloys are discussed in detail. Furthermore, a thermodynamic model is proposed for LPS-BMG design, attempting to build a bridge from monotectic/immiscible (M/I) alloys to LPS-BMGs. This work not only provides opportunities for new insights into the synthesis of LPS-BMGs and their properties but also opens new perspectives for processing and research of M/I alloys.",

author = "J. He and N. Mattern and J. Tan and Zhao, {J. Z.} and I. Kaban and Z. Wang and L. Ratke and Kim, {D. H.} and Kim, {W. T.} and J. Eckert",

note = "Funding Information: The authors thank B. Bartusch, S. Donath, M. Frey, B. Opitz and H.X. Jiang for technical support. Helpful discussions with Prof. F.P. Dai, Dr. Y. Zhang, Dr. B.A. Sun and K.K. Song are gratefully acknowledged. Support from the Alexander von Humboldt Foundation, the National Natural Science Foundation (NNSF) of China (Grant No. 51271185 , 51031003 , 51071159 ), and the Global Research Laboratory Program of the Korean Ministry of Education, Science and Technology is gratefully acknowledged.",

year = "2013",

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doi = "10.1016/j.actamat.2012.12.031",

language = "English",

volume = "61",

pages = "2102--2112",

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T1 - A bridge from monotectic alloys to liquid-phase-separated bulk metallic glasses

T2 - Design, microstructure and phase evolution

AU - He, J.

AU - Mattern, N.

AU - Tan, J.

AU - Zhao, J. Z.

AU - Kaban, I.

AU - Wang, Z.

AU - Ratke, L.

AU - Kim, D. H.

AU - Kim, W. T.

AU - Eckert, J.

N1 - Funding Information: The authors thank B. Bartusch, S. Donath, M. Frey, B. Opitz and H.X. Jiang for technical support. Helpful discussions with Prof. F.P. Dai, Dr. Y. Zhang, Dr. B.A. Sun and K.K. Song are gratefully acknowledged. Support from the Alexander von Humboldt Foundation, the National Natural Science Foundation (NNSF) of China (Grant No. 51271185 , 51031003 , 51071159 ), and the Global Research Laboratory Program of the Korean Ministry of Education, Science and Technology is gratefully acknowledged.

PY - 2013/4

Y1 - 2013/4

N2 - The Zr-Ce-La system is characterized by a miscibility gap and a monotectic reaction. It separates into Zr-rich and CeLa-rich liquids upon cooling through the gap. Based on this system, a new Zr-Ce-La-Al-Co monotectic system was created to synthesize liquid-phase-separated bulk metallic glasses (LPS-BMGs) by copper mold casting. A systematical investigation was performed for the effects of the relative atomic ratios of Zr:CeLa, Co:Al and Ce:La on the microstructure features and chemical compositions of the two coexistent phases. Dual atom pairs with positive heat of mixing (Zr-Ce: +12 kJ mol-1 and Zr-La: +13 kJ mol-1) are originally adopted to develop such LPS-BMGs. A series of in situ formed LPS-BMGs with a critical thickness of 2.5 mm has been successfully synthesized. By combining the kinetics of liquid-liquid phase separation with the formation of metallic glasses, the mechanisms of phase formation and the microstructure evolution in the rapidly cooled alloys are discussed in detail. Furthermore, a thermodynamic model is proposed for LPS-BMG design, attempting to build a bridge from monotectic/immiscible (M/I) alloys to LPS-BMGs. This work not only provides opportunities for new insights into the synthesis of LPS-BMGs and their properties but also opens new perspectives for processing and research of M/I alloys.

AB - The Zr-Ce-La system is characterized by a miscibility gap and a monotectic reaction. It separates into Zr-rich and CeLa-rich liquids upon cooling through the gap. Based on this system, a new Zr-Ce-La-Al-Co monotectic system was created to synthesize liquid-phase-separated bulk metallic glasses (LPS-BMGs) by copper mold casting. A systematical investigation was performed for the effects of the relative atomic ratios of Zr:CeLa, Co:Al and Ce:La on the microstructure features and chemical compositions of the two coexistent phases. Dual atom pairs with positive heat of mixing (Zr-Ce: +12 kJ mol-1 and Zr-La: +13 kJ mol-1) are originally adopted to develop such LPS-BMGs. A series of in situ formed LPS-BMGs with a critical thickness of 2.5 mm has been successfully synthesized. By combining the kinetics of liquid-liquid phase separation with the formation of metallic glasses, the mechanisms of phase formation and the microstructure evolution in the rapidly cooled alloys are discussed in detail. Furthermore, a thermodynamic model is proposed for LPS-BMG design, attempting to build a bridge from monotectic/immiscible (M/I) alloys to LPS-BMGs. This work not only provides opportunities for new insights into the synthesis of LPS-BMGs and their properties but also opens new perspectives for processing and research of M/I alloys.

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A bridge from monotectic alloys to liquid-phase-separated bulk metallic glasses: Design, microstructure and phase evolution

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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