Effects of PTFE Content and Sintering Temperature on the Morphology and Combustion Performances of Al/PTFE Composites

被引：0
|
作者：
Xu W.-T. [1 ]
Hang S.-Y. [1 ]
Li Y.-N. [1 ]
Han Z.-W. [1 ]
Wang B.-L. [1 ]
机构：
[1] School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing
来源：
Wang, Bo-Liang (boliangwang@163.com) | 1600年 / Institute of Chemical Materials, China Academy of Engineering Physics卷 / 28期
关键词：
Combustion performances; Core-shell structure; Micron aluminum; Polytetrafluoroethylene (PTFE); Sintering;
D O I：
10.11943/CJEM2020155
中图分类号：
学科分类号：
摘要：
To explore the effect of polytetrafluoroethylene(PTFE) content and sintering temperature on the morphology and combustion performances of aluminum powder (Al)/PTFE composites, the ball mill-sintering process was used to prepare Al/PTFE samples. These samples have been characterized by scanning electron microscopy(SEM) and X-ray diffractometer (XRD), and the effect of PTFE content and sintering temperature on the microscopic morphology of the composites has been studied. The combustion processes have been analyzed using a confined combustion chamber, coupled with a high-speed camera and infrared thermal imager. The effects of PTFE content and sintering temperature on the combustion performances of the composites have been explored. The results show that sintering at 340℃ can make the composites form a regular core-shell structure. When the PTFE content is less than 35%, the integrity of the particle coating optimizes with the increasing of the PTFE content. However, when the PTFE content continues to increase, the shape of the composite particles becomes irregular, and the condensed products begin to agglomerate. With the increase of PTFE content and sintering temperature, the burning rate, radiation intensity, and the flame temperature of the samples all show a trend of first increase and then decrease. Compare the samples prepared under the optimal conditions (35% PTFE content, sintering temperature 340℃) with the ones prepared under other conditions, the combustion pressure can be increased by 16%, whereas the combustion time is shortened by up to 37%, so that the central flame temperature increases by 317.1℃. This indicates that the appropriate amount (35% optimal) of PTFE content and proper sintering temperature (340℃ optimal) will significantly improve the combustion performances of the composite particles. © 2020, Editorial Board of Chinese Journal of Energetic Materials. All right reserved.
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页码：1061 / 1067
页数：6
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