Experimental study of thermal oxidation of nanoscale alloys of aluminium and zinc (nAlZn)

Fahad Noor; Dongsheng Wen

doi:10.1016/j.jpcs.2015.05.004

Experimental study of thermal oxidation of nanoscale alloys of aluminium and zinc (nAlZn)

Fahad Noor
, Dongsheng Wen^*

^*Corresponding author for this work

University of Engineering and Technology
University of Leeds

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

4 Scopus citations

Abstract

Aluminium-based alloys have wide applications but little is known about the thermal-chemical kinetics of nanoalloys. This work investigated the thermal oxidation of Zn and Al nanoalloys (nAlZn) with a BET equivalent diameter of 141 nm through the simultaneous TGA/DSC method. The thermal analysis was combined with elemental, morphology and crystalline structure analysis to elucidate the reaction mechanisms. It was found that the complete oxidation of nAlZn in air can be characterised by a three-stage process, including two endothermic and three exothermic reactions. With the help of ex-situ XRD, different reaction pathways were proposed for different stages, forming the end products of ZnO and ZnAl₂O₄. The reactivity comparison between Al and nAlZn suggested that different criteria should be used for different applications.

Original language	English
Pages (from-to)	188-196
Number of pages	9
Journal	Journal of Physics and Chemistry of Solids
Volume	85
DOIs	https://doi.org/10.1016/j.jpcs.2015.05.004
State	Published - 12 Jun 2015
Externally published	Yes

Keywords

Alloys
Nanostructures
Thermodynamic properties
Thermogravimetric analysis (TGA)

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10.1016/j.jpcs.2015.05.004

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title = "Experimental study of thermal oxidation of nanoscale alloys of aluminium and zinc (nAlZn)",

abstract = "Aluminium-based alloys have wide applications but little is known about the thermal-chemical kinetics of nanoalloys. This work investigated the thermal oxidation of Zn and Al nanoalloys (nAlZn) with a BET equivalent diameter of 141 nm through the simultaneous TGA/DSC method. The thermal analysis was combined with elemental, morphology and crystalline structure analysis to elucidate the reaction mechanisms. It was found that the complete oxidation of nAlZn in air can be characterised by a three-stage process, including two endothermic and three exothermic reactions. With the help of ex-situ XRD, different reaction pathways were proposed for different stages, forming the end products of ZnO and ZnAl2O4. The reactivity comparison between Al and nAlZn suggested that different criteria should be used for different applications.",

keywords = "Alloys, Nanostructures, Thermodynamic properties, Thermogravimetric analysis (TGA)",

author = "Fahad Noor and Dongsheng Wen",

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pages = "188--196",

journal = "Journal of Physics and Chemistry of Solids",

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TY - JOUR

T1 - Experimental study of thermal oxidation of nanoscale alloys of aluminium and zinc (nAlZn)

AU - Noor, Fahad

AU - Wen, Dongsheng

PY - 2015/6/12

Y1 - 2015/6/12

N2 - Aluminium-based alloys have wide applications but little is known about the thermal-chemical kinetics of nanoalloys. This work investigated the thermal oxidation of Zn and Al nanoalloys (nAlZn) with a BET equivalent diameter of 141 nm through the simultaneous TGA/DSC method. The thermal analysis was combined with elemental, morphology and crystalline structure analysis to elucidate the reaction mechanisms. It was found that the complete oxidation of nAlZn in air can be characterised by a three-stage process, including two endothermic and three exothermic reactions. With the help of ex-situ XRD, different reaction pathways were proposed for different stages, forming the end products of ZnO and ZnAl2O4. The reactivity comparison between Al and nAlZn suggested that different criteria should be used for different applications.

AB - Aluminium-based alloys have wide applications but little is known about the thermal-chemical kinetics of nanoalloys. This work investigated the thermal oxidation of Zn and Al nanoalloys (nAlZn) with a BET equivalent diameter of 141 nm through the simultaneous TGA/DSC method. The thermal analysis was combined with elemental, morphology and crystalline structure analysis to elucidate the reaction mechanisms. It was found that the complete oxidation of nAlZn in air can be characterised by a three-stage process, including two endothermic and three exothermic reactions. With the help of ex-situ XRD, different reaction pathways were proposed for different stages, forming the end products of ZnO and ZnAl2O4. The reactivity comparison between Al and nAlZn suggested that different criteria should be used for different applications.

KW - Alloys

KW - Nanostructures

KW - Thermodynamic properties

KW - Thermogravimetric analysis (TGA)

UR - https://www.scopus.com/pages/publications/84930934526

U2 - 10.1016/j.jpcs.2015.05.004

DO - 10.1016/j.jpcs.2015.05.004

M3 - 文章

AN - SCOPUS:84930934526

SN - 0022-3697

VL - 85

SP - 188

EP - 196

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

ER -

Experimental study of thermal oxidation of nanoscale alloys of aluminium and zinc (nAlZn)

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Keywords

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