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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Detalles Bibliográficos
Publicado:	2000
Materias:	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
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13689290_v11_n3_p299_DeTendler http://hdl.handle.net/20.500.12110/paper_13689290_v11_n3_p299_DeTendler
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_13689290_v11_n3_p299_DeTendler
record_format	dspace
spelling	paper:paper_13689290_v11_n3_p299_DeTendler2025-07-30T18:48:00Z Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys 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. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13689290_v11_n3_p299_DeTendler 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 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.
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
publishDate	2000
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13689290_v11_n3_p299_DeTendler http://hdl.handle.net/20.500.12110/paper_13689290_v11_n3_p299_DeTendler
_version_	1840322239451365376

Theoretical analysis of the glass-forming behaviour of Ni-Zr and Ni-Zr-Fe alloys

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