Amorphization of Ni60Nb20Zr20 by mechanical alloying

M. H. Enayati; Peter Schumacher; B. Cantor

doi:10.1016/j.msea.2003.10.061

Amorphization of Ni₆₀Nb₂₀Zr₂₀ by mechanical alloying

M. H. Enayati, Peter Schumacher, B. Cantor

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

11 Citations (Scopus)

Abstract

Elemental Ni, Nb and Zr powder mixtures with composition Ni60Nb20Zr20 were mechanically alloyed in a ball mill. The evolution of structure of the powders was investigated with a combination of X-ray diffractometry and differential scanning calorimetry and was compared with corresponding melt spun samples. Mechanical alloying of Ni60Nb20Zr20 alloy involves two consecutive amorphization reactions. Mechanical alloying first leads to the amorphization reaction between Ni and Zr layers with a strong thermodynamic driving force as well as fast kinetics for Ni-Zr amorphization compared with Ni-Nb amorphization. On further milling the kinetic requirements for a Ni-Nb amorphization reaction is fulfilled and consequently a Ni-Nb amorphous phase forms. The resulting two amorphous phases homogenize at longer milling times.

Original language	English
Pages (from-to)	812-814
Number of pages	3
Journal	Materials Science and Engineering A
Volume	375-377.2004
Issue number	July
DOIs	https://doi.org/10.1016/j.msea.2003.10.061
Publication status	E-pub ahead of print - 2 Dec 2003
Externally published	Yes

Keywords

Amorphization
Mechanical alloying
Melt spinning
Ni-Nb-Zr

Access to Document

10.1016/j.msea.2003.10.061

Cite this

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title = "Amorphization of Ni60Nb20Zr20 by mechanical alloying",

abstract = "Elemental Ni, Nb and Zr powder mixtures with composition Ni60Nb20Zr20 were mechanically alloyed in a ball mill. The evolution of structure of the powders was investigated with a combination of X-ray diffractometry and differential scanning calorimetry and was compared with corresponding melt spun samples. Mechanical alloying of Ni60Nb20Zr20 alloy involves two consecutive amorphization reactions. Mechanical alloying first leads to the amorphization reaction between Ni and Zr layers with a strong thermodynamic driving force as well as fast kinetics for Ni-Zr amorphization compared with Ni-Nb amorphization. On further milling the kinetic requirements for a Ni-Nb amorphization reaction is fulfilled and consequently a Ni-Nb amorphous phase forms. The resulting two amorphous phases homogenize at longer milling times.",

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AU - Enayati, M. H.

AU - Schumacher, Peter

AU - Cantor, B.

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N2 - Elemental Ni, Nb and Zr powder mixtures with composition Ni60Nb20Zr20 were mechanically alloyed in a ball mill. The evolution of structure of the powders was investigated with a combination of X-ray diffractometry and differential scanning calorimetry and was compared with corresponding melt spun samples. Mechanical alloying of Ni60Nb20Zr20 alloy involves two consecutive amorphization reactions. Mechanical alloying first leads to the amorphization reaction between Ni and Zr layers with a strong thermodynamic driving force as well as fast kinetics for Ni-Zr amorphization compared with Ni-Nb amorphization. On further milling the kinetic requirements for a Ni-Nb amorphization reaction is fulfilled and consequently a Ni-Nb amorphous phase forms. The resulting two amorphous phases homogenize at longer milling times.

AB - Elemental Ni, Nb and Zr powder mixtures with composition Ni60Nb20Zr20 were mechanically alloyed in a ball mill. The evolution of structure of the powders was investigated with a combination of X-ray diffractometry and differential scanning calorimetry and was compared with corresponding melt spun samples. Mechanical alloying of Ni60Nb20Zr20 alloy involves two consecutive amorphization reactions. Mechanical alloying first leads to the amorphization reaction between Ni and Zr layers with a strong thermodynamic driving force as well as fast kinetics for Ni-Zr amorphization compared with Ni-Nb amorphization. On further milling the kinetic requirements for a Ni-Nb amorphization reaction is fulfilled and consequently a Ni-Nb amorphous phase forms. The resulting two amorphous phases homogenize at longer milling times.

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KW - Mechanical alloying

KW - Melt spinning

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