Spherical Al-Zr alloy powders prepared by centrifugal atomization for tunable energetic behavior

Xiaohang Ma; Wanjun Zhao; Xin Zeng; Shi Yan; Dazhi Liu; Fan Zhang; Qingjie Jiao

doi:10.1016/j.matlet.2022.131955

Spherical Al-Zr alloy powders prepared by centrifugal atomization for tunable energetic behavior

Xiaohang Ma, Wanjun Zhao^*, Xin Zeng, Shi Yan, Dazhi Liu, Fan Zhang, Qingjie Jiao

^*Corresponding author for this work

School of Mechatronical Engineering

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

6 Citations (Scopus)

Abstract

To improve the energetic behavior of Al, heterogeneous Al-Zr alloy powders were prepared by high-speed centrifugal atomization in this paper, the phase composition of which is Al and Al₃Zr. The thermal analysis results show that the main oxidation process of Al-Zr occurs at 800 °C–1200 °C. The oxidation peak temperature of the alloy is 25 °C lower than that of Al, accompanied with a higher weight gain and faster oxidation rate. Besides, the activation energy (E_k) is significantly reduced by 74 kJ/mol. Compared with Al/CuO, the ignition delay of Al-Zr/CuO is shortened by 0.6 ms, and the reaction temperature is advanced by 29 °C. This is due to the earlier concentrated heat release of Al₃Zr and the grain refinement of Al-Zr that aggravates the shell fracture and result in more intense oxidation of the alloy powders. Therefore, Al-Zr alloy powders possess a significantly enhanced combustion performance than Al.

Original language	English
Article number	131955
Journal	Materials Letters
Volume	315
DOIs	https://doi.org/10.1016/j.matlet.2022.131955
Publication status	Published - 15 May 2022

Keywords

Activation energy
Combustion
Metals and alloys
Thermal analysis

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10.1016/j.matlet.2022.131955

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title = "Spherical Al-Zr alloy powders prepared by centrifugal atomization for tunable energetic behavior",

abstract = "To improve the energetic behavior of Al, heterogeneous Al-Zr alloy powders were prepared by high-speed centrifugal atomization in this paper, the phase composition of which is Al and Al3Zr. The thermal analysis results show that the main oxidation process of Al-Zr occurs at 800 °C–1200 °C. The oxidation peak temperature of the alloy is 25 °C lower than that of Al, accompanied with a higher weight gain and faster oxidation rate. Besides, the activation energy (Ek) is significantly reduced by 74 kJ/mol. Compared with Al/CuO, the ignition delay of Al-Zr/CuO is shortened by 0.6 ms, and the reaction temperature is advanced by 29 °C. This is due to the earlier concentrated heat release of Al3Zr and the grain refinement of Al-Zr that aggravates the shell fracture and result in more intense oxidation of the alloy powders. Therefore, Al-Zr alloy powders possess a significantly enhanced combustion performance than Al.",

keywords = "Activation energy, Combustion, Metals and alloys, Thermal analysis",

author = "Xiaohang Ma and Wanjun Zhao and Xin Zeng and Shi Yan and Dazhi Liu and Fan Zhang and Qingjie Jiao",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2022",

month = may,

day = "15",

doi = "10.1016/j.matlet.2022.131955",

language = "English",

volume = "315",

journal = "Materials Letters",

issn = "0167-577X",

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TY - JOUR

T1 - Spherical Al-Zr alloy powders prepared by centrifugal atomization for tunable energetic behavior

AU - Ma, Xiaohang

AU - Zhao, Wanjun

AU - Zeng, Xin

AU - Yan, Shi

AU - Liu, Dazhi

AU - Zhang, Fan

AU - Jiao, Qingjie

PY - 2022/5/15

Y1 - 2022/5/15

N2 - To improve the energetic behavior of Al, heterogeneous Al-Zr alloy powders were prepared by high-speed centrifugal atomization in this paper, the phase composition of which is Al and Al3Zr. The thermal analysis results show that the main oxidation process of Al-Zr occurs at 800 °C–1200 °C. The oxidation peak temperature of the alloy is 25 °C lower than that of Al, accompanied with a higher weight gain and faster oxidation rate. Besides, the activation energy (Ek) is significantly reduced by 74 kJ/mol. Compared with Al/CuO, the ignition delay of Al-Zr/CuO is shortened by 0.6 ms, and the reaction temperature is advanced by 29 °C. This is due to the earlier concentrated heat release of Al3Zr and the grain refinement of Al-Zr that aggravates the shell fracture and result in more intense oxidation of the alloy powders. Therefore, Al-Zr alloy powders possess a significantly enhanced combustion performance than Al.

AB - To improve the energetic behavior of Al, heterogeneous Al-Zr alloy powders were prepared by high-speed centrifugal atomization in this paper, the phase composition of which is Al and Al3Zr. The thermal analysis results show that the main oxidation process of Al-Zr occurs at 800 °C–1200 °C. The oxidation peak temperature of the alloy is 25 °C lower than that of Al, accompanied with a higher weight gain and faster oxidation rate. Besides, the activation energy (Ek) is significantly reduced by 74 kJ/mol. Compared with Al/CuO, the ignition delay of Al-Zr/CuO is shortened by 0.6 ms, and the reaction temperature is advanced by 29 °C. This is due to the earlier concentrated heat release of Al3Zr and the grain refinement of Al-Zr that aggravates the shell fracture and result in more intense oxidation of the alloy powders. Therefore, Al-Zr alloy powders possess a significantly enhanced combustion performance than Al.

KW - Activation energy

KW - Combustion

KW - Metals and alloys

KW - Thermal analysis

UR - http://www.scopus.com/inward/record.url?scp=85125014702&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2022.131955

DO - 10.1016/j.matlet.2022.131955

M3 - Article

AN - SCOPUS:85125014702

SN - 0167-577X

VL - 315

JO - Materials Letters

JF - Materials Letters

M1 - 131955

ER -

Spherical Al-Zr alloy powders prepared by centrifugal atomization for tunable energetic behavior

Abstract

Keywords

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