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Tungsten combustion in impact initiated W–Al composite based on W(Al) super-saturated solid solution

Tungsten combustion in impact initiated W–Al composite based on W(Al) super-saturated solid solution

Authors :
Zhao, Kong-xun
Zhang, Xiao-hong
Gu, Xiao-ran
Tang, Yu
Li, Shun
Ye, Yi-cong
Zhu, Li'an
Bai, Shu-xin
Source :
Defence Technology; July 2023, Vol. 25 Issue: 1 p112-120, 9p
Publication Year :
2023

Abstract

Element W can effectively improve the density of energetic structural materials. However, W is an inert element and does not combust in air. To change the reaction characteristics of W, 60 at.% Al was introduced into W through mechanical alloying. XRD analysis shows that after 50 h of ball milling, the diffraction peak of Al completely disappears and W(Al60) super-saturated solid solution powder is obtained. Further observation by HAADF and HRTEM reveals that the W(Al60) super-saturated solid solution powder is a mixture of solid solution and amorphous phase. Based on the good thermal stability of W(Al60) alloy powder below 1000 °C, W(Al60)–Al composite was synthesized by hot pressing process. Impact initiation experiments suggest that the W(Al60)–Al composite has excellent reaction characteristics, and multiple types of tungsten oxides are detected in the reaction products, showing that the modified W is combustible in air. Due to the combustion of tungsten, the energy release rate of the W(Al60)–Al composite at speed of 1362 m/s reaches 2.71 kJ/g.

Details

Language :
English
ISSN :
22149147
Volume :
25
Issue :
1
Database :
Supplemental Index
Journal :
Defence Technology
Publication Type :
Periodical
Accession number :
ejs59618742
Full Text :
https://doi.org/10.1016/j.dt.2022.04.018