Characterization of Ni57Zr20Ti18Al 5 amorphous powder obtained by mechanical alloying

Pee Yew Lee; Chung Kwei Lin; I. Kuan Jeng; Chien Chung Wang; Giin Shan Chen

doi:10.1016/j.matchemphys.2003.11.026

Characterization of Ni₅₇Zr₂₀Ti₁₈Al ₅ amorphous powder obtained by mechanical alloying

Pee Yew Lee, Chung Kwei Lin, I. Kuan Jeng, Chien Chung Wang, Giin Shan Chen

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

7 Citations (Scopus)

Abstract

This study examined the amorphization behavior and thermal stability of mechanically alloyed Ni₅₇Zr₂₀Ti₁₈Al ₅ alloy powders synthesized by high-energy ball milling. Complete amorphization is feasible after 5h of milling. The thermal stability of the Ni₅₇Zr₂₀Ti₁₈Al₅ amorphous powders was investigated by differential thermal analysis. As the results demonstrated, the temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (T_g) and crystallization temperature (T_x), i.e., ΔT (=T _x-T_g) is 54K for Ni₅₇Zr₂₀Ti ₁₈Al₅. The glass transition and crystallization temperatures of mechanically alloyed samples are different from those reported in the literature for samples prepared by melt spinning techniques. The different thermal stability is believed to be due to the introduction of impurities into the ball-milled samples during mechanical alloying process. The glass transition behavior in the Ni₅₇Zr₂₀Ti ₁₈Al₅ is found to be a kinetically modified thermodynamic phase transformation process.

Original language	English
Pages (from-to)	358-362
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	84
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2003.11.026
Publication status	Published - Apr 2004
Externally published	Yes

Keywords

Amorphous phase
Glass transition
Mechanical alloying
Ni-based alloys
Supercooled liquid region

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2003.11.026

Cite this

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title = "Characterization of Ni57Zr20Ti18Al 5 amorphous powder obtained by mechanical alloying",

abstract = "This study examined the amorphization behavior and thermal stability of mechanically alloyed Ni57Zr20Ti18Al 5 alloy powders synthesized by high-energy ball milling. Complete amorphization is feasible after 5h of milling. The thermal stability of the Ni57Zr20Ti18Al5 amorphous powders was investigated by differential thermal analysis. As the results demonstrated, the temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (Tg) and crystallization temperature (Tx), i.e., ΔT (=T x-Tg) is 54K for Ni57Zr20Ti 18Al5. The glass transition and crystallization temperatures of mechanically alloyed samples are different from those reported in the literature for samples prepared by melt spinning techniques. The different thermal stability is believed to be due to the introduction of impurities into the ball-milled samples during mechanical alloying process. The glass transition behavior in the Ni57Zr20Ti 18Al5 is found to be a kinetically modified thermodynamic phase transformation process.",

keywords = "Amorphous phase, Glass transition, Mechanical alloying, Ni-based alloys, Supercooled liquid region",

author = "Lee, {Pee Yew} and Lin, {Chung Kwei} and Jeng, {I. Kuan} and Wang, {Chien Chung} and Chen, {Giin Shan}",

note = "Funding Information: The authors are grateful for the financial support of this work by the National Science Council of Republic of China under Grant No. NSC 90-2216-E-019-002. The authors also thank the entire staff at NSRRC (Hsinchu, Taiwan, ROC) for the expertise assistance. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2004",

month = apr,

doi = "10.1016/j.matchemphys.2003.11.026",

language = "English",

volume = "84",

pages = "358--362",

journal = "Materials Chemistry and Physics",

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AU - Lee, Pee Yew

AU - Lin, Chung Kwei

AU - Jeng, I. Kuan

AU - Wang, Chien Chung

AU - Chen, Giin Shan

N1 - Funding Information: The authors are grateful for the financial support of this work by the National Science Council of Republic of China under Grant No. NSC 90-2216-E-019-002. The authors also thank the entire staff at NSRRC (Hsinchu, Taiwan, ROC) for the expertise assistance. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2004/4

Y1 - 2004/4

N2 - This study examined the amorphization behavior and thermal stability of mechanically alloyed Ni57Zr20Ti18Al 5 alloy powders synthesized by high-energy ball milling. Complete amorphization is feasible after 5h of milling. The thermal stability of the Ni57Zr20Ti18Al5 amorphous powders was investigated by differential thermal analysis. As the results demonstrated, the temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (Tg) and crystallization temperature (Tx), i.e., ΔT (=T x-Tg) is 54K for Ni57Zr20Ti 18Al5. The glass transition and crystallization temperatures of mechanically alloyed samples are different from those reported in the literature for samples prepared by melt spinning techniques. The different thermal stability is believed to be due to the introduction of impurities into the ball-milled samples during mechanical alloying process. The glass transition behavior in the Ni57Zr20Ti 18Al5 is found to be a kinetically modified thermodynamic phase transformation process.

AB - This study examined the amorphization behavior and thermal stability of mechanically alloyed Ni57Zr20Ti18Al 5 alloy powders synthesized by high-energy ball milling. Complete amorphization is feasible after 5h of milling. The thermal stability of the Ni57Zr20Ti18Al5 amorphous powders was investigated by differential thermal analysis. As the results demonstrated, the temperature interval of the supercooled liquid region defined by the difference between glass transition temperature (Tg) and crystallization temperature (Tx), i.e., ΔT (=T x-Tg) is 54K for Ni57Zr20Ti 18Al5. The glass transition and crystallization temperatures of mechanically alloyed samples are different from those reported in the literature for samples prepared by melt spinning techniques. The different thermal stability is believed to be due to the introduction of impurities into the ball-milled samples during mechanical alloying process. The glass transition behavior in the Ni57Zr20Ti 18Al5 is found to be a kinetically modified thermodynamic phase transformation process.

KW - Amorphous phase

KW - Glass transition

KW - Mechanical alloying

KW - Ni-based alloys

KW - Supercooled liquid region

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