Exothermic reaction in eutectoid Zn-Al based alloys

Y. H. Zhu; Hau Chung Man; Wing Bun Lee

Exothermic reaction in eutectoid Zn-Al based alloys

Y. H. Zhu, Hau Chung Man, Wing Bun Lee

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

Both solution treated and quench-aged eutectoid Zn-Al based alloys (ZnAl20Cu3Si2 and ZnAl22Cu2 in wt.%) were studied by differential scanning calorimeter (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. An exothermic phenomenon was observed at the early stage of ageing. Similar behavior was also found for the cast eutectoid Zn-Al alloy. The activation energy for the exothermic phenomenon was calculated, which was in a good agreement with that derived from X-ray diffraction examination for the decomposition of the supersaturated β′sphase in the eutectoid Zn-Al based alloy. It is concluded that the decomposition of the β′sphase is an exothermic solid state reaction in the eutectoid Zn-Al based alloys.

Original language	English
Pages (from-to)	147-153
Number of pages	7
Journal	Materials Science and Engineering A
Volume	268
Issue number	1-2
Publication status	Published - 15 Aug 1999

Keywords

Exothermic reaction
Scanning electron microscopy
Zn-Al alloys

ASJC Scopus subject areas

General Materials Science

Cite this

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title = "Exothermic reaction in eutectoid Zn-Al based alloys",

abstract = "Both solution treated and quench-aged eutectoid Zn-Al based alloys (ZnAl20Cu3Si2 and ZnAl22Cu2 in wt.%) were studied by differential scanning calorimeter (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. An exothermic phenomenon was observed at the early stage of ageing. Similar behavior was also found for the cast eutectoid Zn-Al alloy. The activation energy for the exothermic phenomenon was calculated, which was in a good agreement with that derived from X-ray diffraction examination for the decomposition of the supersaturated β′sphase in the eutectoid Zn-Al based alloy. It is concluded that the decomposition of the β′sphase is an exothermic solid state reaction in the eutectoid Zn-Al based alloys.",

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T1 - Exothermic reaction in eutectoid Zn-Al based alloys

AU - Zhu, Y. H.

AU - Man, Hau Chung

AU - Lee, Wing Bun

PY - 1999/8/15

Y1 - 1999/8/15

N2 - Both solution treated and quench-aged eutectoid Zn-Al based alloys (ZnAl20Cu3Si2 and ZnAl22Cu2 in wt.%) were studied by differential scanning calorimeter (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. An exothermic phenomenon was observed at the early stage of ageing. Similar behavior was also found for the cast eutectoid Zn-Al alloy. The activation energy for the exothermic phenomenon was calculated, which was in a good agreement with that derived from X-ray diffraction examination for the decomposition of the supersaturated β′sphase in the eutectoid Zn-Al based alloy. It is concluded that the decomposition of the β′sphase is an exothermic solid state reaction in the eutectoid Zn-Al based alloys.

AB - Both solution treated and quench-aged eutectoid Zn-Al based alloys (ZnAl20Cu3Si2 and ZnAl22Cu2 in wt.%) were studied by differential scanning calorimeter (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. An exothermic phenomenon was observed at the early stage of ageing. Similar behavior was also found for the cast eutectoid Zn-Al alloy. The activation energy for the exothermic phenomenon was calculated, which was in a good agreement with that derived from X-ray diffraction examination for the decomposition of the supersaturated β′sphase in the eutectoid Zn-Al based alloy. It is concluded that the decomposition of the β′sphase is an exothermic solid state reaction in the eutectoid Zn-Al based alloys.

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KW - Scanning electron microscopy

KW - Zn-Al alloys

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M3 - Journal article

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VL - 268

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EP - 153

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

IS - 1-2

ER -

Exothermic reaction in eutectoid Zn-Al based alloys

Abstract

Keywords

ASJC Scopus subject areas

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