Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys
The metastable free energy diagram of the Ni-Zr alloy at 300 K was calculated using Miedema's theory. A previous extension of the theory to ternary systems was further developed and used to calculate the free energies of the metastable amorphous phase and crystalline solid solutions of the Ni-Z...
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todo:paper_13689290_v11_n3_p299_DeTendler2023-10-03T16:11:36Z Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys De Tendler, R.H. Barbiric, D.A. Rodriguez, C. Kovacs, J.A. Pepe, M.E. Gallego, L.J. Alonso, J.A. Gibbs free energy Glass transition Intermetallics Mathematical models Nickel alloys Solid solutions Temperature Complete glass forming range Extended glass forming range Glass forming behavior Miedema theory Amorphous alloys The metastable free energy diagram of the Ni-Zr alloy at 300 K was calculated using Miedema's theory. A previous extension of the theory to ternary systems was further developed and used to calculate the free energies of the metastable amorphous phase and crystalline solid solutions of the Ni-Zr-Fe system at 300 K. The results of the calculations are compared with experimental data taken from the literature. The metastable free energy diagram of Ni-Zr is consistent with the measured glass-forming range. It allows to predict the succession of phases - amorphous alloys, crystalline solid solutions and intermetallic compounds - observed in rapidly quenched Ni-Zr alloys and in solid-state interdiffusion in Ni-Zr composites. In the ternary system Ni-Zr-Fe, intersections of the calculated free-energy surfaces of solid solutions together with that of the amorphous phase define an extended glass-forming composition range that contains the observed Ni-Zr-Fe glass compositions. The relative positions of the free-energy surfaces of the bcc solid solution and the amorphous phase and the region of metastable equilibrium between amorphous alloy and α-Zr solid solution provide the basis for interpreting the appearance of different phases in experiments on partial amorphization of Zr-rich, Ni-Zr-Fe melt-quenched alloys. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13689290_v11_n3_p299_DeTendler |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Gibbs free energy Glass transition Intermetallics Mathematical models Nickel alloys Solid solutions Temperature Complete glass forming range Extended glass forming range Glass forming behavior Miedema theory Amorphous alloys |
spellingShingle |
Gibbs free energy Glass transition Intermetallics Mathematical models Nickel alloys Solid solutions Temperature Complete glass forming range Extended glass forming range Glass forming behavior Miedema theory Amorphous alloys De Tendler, R.H. Barbiric, D.A. Rodriguez, C. Kovacs, J.A. Pepe, M.E. Gallego, L.J. Alonso, J.A. Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys |
topic_facet |
Gibbs free energy Glass transition Intermetallics Mathematical models Nickel alloys Solid solutions Temperature Complete glass forming range Extended glass forming range Glass forming behavior Miedema theory Amorphous alloys |
description |
The metastable free energy diagram of the Ni-Zr alloy at 300 K was calculated using Miedema's theory. A previous extension of the theory to ternary systems was further developed and used to calculate the free energies of the metastable amorphous phase and crystalline solid solutions of the Ni-Zr-Fe system at 300 K. The results of the calculations are compared with experimental data taken from the literature. The metastable free energy diagram of Ni-Zr is consistent with the measured glass-forming range. It allows to predict the succession of phases - amorphous alloys, crystalline solid solutions and intermetallic compounds - observed in rapidly quenched Ni-Zr alloys and in solid-state interdiffusion in Ni-Zr composites. In the ternary system Ni-Zr-Fe, intersections of the calculated free-energy surfaces of solid solutions together with that of the amorphous phase define an extended glass-forming composition range that contains the observed Ni-Zr-Fe glass compositions. The relative positions of the free-energy surfaces of the bcc solid solution and the amorphous phase and the region of metastable equilibrium between amorphous alloy and α-Zr solid solution provide the basis for interpreting the appearance of different phases in experiments on partial amorphization of Zr-rich, Ni-Zr-Fe melt-quenched alloys. |
format |
JOUR |
author |
De Tendler, R.H. Barbiric, D.A. Rodriguez, C. Kovacs, J.A. Pepe, M.E. Gallego, L.J. Alonso, J.A. |
author_facet |
De Tendler, R.H. Barbiric, D.A. Rodriguez, C. Kovacs, J.A. Pepe, M.E. Gallego, L.J. Alonso, J.A. |
author_sort |
De Tendler, R.H. |
title |
Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys |
title_short |
Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys |
title_full |
Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys |
title_fullStr |
Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys |
title_full_unstemmed |
Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys |
title_sort |
theoretical analysis of the glass-forming behaviour of ni-zr and ni-zr-fe alloys |
url |
http://hdl.handle.net/20.500.12110/paper_13689290_v11_n3_p299_DeTendler |
work_keys_str_mv |
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1782030525962125312 |