Phase transformations induced by mechanical alloying of Ag-28 at.-%Al alloy

R. Esquivel-Gonzalez; H. J. Dorantes-Rosales; V. M. López-Hirata; J. L. González-Velázquez; E. Contreras-Piedras; M. L. Saucedo-Muñoz; F. Hernández Santiago

doi:10.1179/174328408X389760

Phase transformations induced by mechanical alloying of Ag-28 at.-%Al alloy

R. Esquivel-Gonzalez, H. J. Dorantes-Rosales, V. M. López-Hirata, J. L. González-Velázquez, E. Contreras-Piedras, M. L. Saucedo-Muñoz, F. Hernández Santiago

Escuela Superior de Ingeniería Mecánica y Eléctrica (ESIME), Unidad Azcapotzalco

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

3 Scopus citations

Abstract

A Ag-28 at.-%Al alloy was obtained by mechanical alloying in a SPEX 8000D mill from elemental Ag and Al powders. Two vials with different internal volume and two ball powder weight ratios were used to analyse the phase evolution. Microstructural characterisation was carried out by X-ray diffraction, SEM and TEM. The sequence of phase transformation during the milling process was as follows: Ag+Al (powders) →α→α+ζ→α+ζ+μ→μ+ζ →μ. The formation of the α and ζ phases is favoured by the energy of the impacts in the early stage of milling, while the formation kinetics rate of the μ phase was faster for the higher vial volume and ball/powder weight ratio. TEM images confirm the presence of the μ phase with a nanometric grain size.

Original language	English
Pages (from-to)	53-57
Number of pages	5
Journal	Materials Science and Technology
Volume	26
Issue number	1
DOIs	https://doi.org/10.1179/174328408X389760
State	Published - 1 Jan 2010

Keywords

Ag-Al alloys
Intermetallics
Mechanical alloying
Milling parameters
Phase transformation

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title = "Phase transformations induced by mechanical alloying of Ag-28 at.-%Al alloy",

abstract = "A Ag-28 at.-%Al alloy was obtained by mechanical alloying in a SPEX 8000D mill from elemental Ag and Al powders. Two vials with different internal volume and two ball powder weight ratios were used to analyse the phase evolution. Microstructural characterisation was carried out by X-ray diffraction, SEM and TEM. The sequence of phase transformation during the milling process was as follows: Ag+Al (powders) →α→α+ζ→α+ζ+μ→μ+ζ →μ. The formation of the α and ζ phases is favoured by the energy of the impacts in the early stage of milling, while the formation kinetics rate of the μ phase was faster for the higher vial volume and ball/powder weight ratio. TEM images confirm the presence of the μ phase with a nanometric grain size.",

keywords = "Ag-Al alloys, Intermetallics, Mechanical alloying, Milling parameters, Phase transformation",

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AU - Esquivel-Gonzalez, R.

AU - Dorantes-Rosales, H. J.

AU - López-Hirata, V. M.

AU - González-Velázquez, J. L.

AU - Contreras-Piedras, E.

AU - Saucedo-Muñoz, M. L.

AU - Hernández Santiago, F.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - A Ag-28 at.-%Al alloy was obtained by mechanical alloying in a SPEX 8000D mill from elemental Ag and Al powders. Two vials with different internal volume and two ball powder weight ratios were used to analyse the phase evolution. Microstructural characterisation was carried out by X-ray diffraction, SEM and TEM. The sequence of phase transformation during the milling process was as follows: Ag+Al (powders) →α→α+ζ→α+ζ+μ→μ+ζ →μ. The formation of the α and ζ phases is favoured by the energy of the impacts in the early stage of milling, while the formation kinetics rate of the μ phase was faster for the higher vial volume and ball/powder weight ratio. TEM images confirm the presence of the μ phase with a nanometric grain size.

AB - A Ag-28 at.-%Al alloy was obtained by mechanical alloying in a SPEX 8000D mill from elemental Ag and Al powders. Two vials with different internal volume and two ball powder weight ratios were used to analyse the phase evolution. Microstructural characterisation was carried out by X-ray diffraction, SEM and TEM. The sequence of phase transformation during the milling process was as follows: Ag+Al (powders) →α→α+ζ→α+ζ+μ→μ+ζ →μ. The formation of the α and ζ phases is favoured by the energy of the impacts in the early stage of milling, while the formation kinetics rate of the μ phase was faster for the higher vial volume and ball/powder weight ratio. TEM images confirm the presence of the μ phase with a nanometric grain size.

KW - Ag-Al alloys

KW - Intermetallics

KW - Mechanical alloying

KW - Milling parameters

KW - Phase transformation

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DO - 10.1179/174328408X389760

M3 - Artículo

SN - 0267-0836

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SP - 53

EP - 57

JO - Materials Science and Technology

JF - Materials Science and Technology

IS - 1

ER -

Phase transformations induced by mechanical alloying of Ag-28 at.-%Al alloy

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Keywords

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