激光烧蚀下不同颗粒度Al-teflon的反应行为

丁彤; 郭文灿; 张旭; 王忠淼; 郑贤旭; 刘仓理

doi:10.11883/bzycj-2019-0023

激光烧蚀下不同颗粒度Al-teflon的反应行为

doi: 10.11883/bzycj-2019-0023

1.
中国工程物理研究院流体物理研究所，四川绵阳 621999
2.
中国工程物理研究院，四川绵阳 621999

基金项目: 科学挑战专题（TZ2018001）；国家自然科学基金（11802284）；国防基础科学研究计划（JSZL2016212C001）；冲击波物理与爆轰物理重点实验室稳定支持项目（LSD-KB1806）

详细信息

作者简介:
丁　彤（1994－　），男，博士研究生，dt1209@mail.ustc.edu.cn

通讯作者:
郭文灿（1984－　），男，博士，助理研究员，guowencan1984@163.com

中图分类号: O381
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- 被引次数: 0
出版历程
- 收稿日期: 2019-01-21
- 修回日期: 2019-03-18
- 网络出版日期: 2019-04-25
- 刊出日期: 2019-04-01

Reaction properties of Al-teflon with different particle sizes under laser ablation

1.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

摘要

摘要:
为研究不同颗粒度对Al-teflon反应行为的影响，以颗粒度25 μm、1 μm和20～200 nm的Al粉和微米级Teflon粉混合制备的反应材料为研究对象，基于脉冲激光烧蚀实验，结合ICCD相机和光谱仪对反应过程中的自发光成像和发射光谱进行瞬态观测。研究结果表明，Al-teflon反应材料在激光烧蚀下的反应行为体现出典型的二次反应特征，具有持续燃烧特征和明显的后燃效应，也具有较长的能量释放时间；同时，其反应行为与Al粉颗粒度密切相关：初始阶段，反应随Al粉颗粒度的降低加剧，随着反应的进行，纳米级Al粉对应的反应材料后续反应能力逐渐下降，反应强度和反应时间都小于1 μm铝粉对应的反应材料。
- 激光烧蚀 /
- Al-teflon /
- 颗粒度 /
- 反应行为
Abstract:
In order to study reaction properties of Al-teflon with different particle sizes, we prepared Al-teflon reactive material powders by mixing Al powder with particle sizes of 25 μm, 1 μm, and 20-200 nm, where micron-sized teflon powder as raw materials. The laser ablation experiments of Al-teflon reactive material were performed by a pulsed laser system. The self-luminescence imaging and emission spectra in the reaction process were collected and analyzed by ICCD camera and spectrometer. The results show that the reaction properties of Al-teflon reactive material under laser ablation reflect the characteristics of typical secondary reactions, together with continuous combustion characteristics and obvious afterburning effects, and the total energy release time is long. At the same time, the reaction properties is closely related to the particle size of Al powder. As the particle size of Al powder decreases, the reaction becomes more violently in the initial reaction stage. As the reaction progresses, the subsequent reaction capability of the corresponding reactive material with nano-Al size powder gradually decreases, the reaction intensity and reaction time are not as good as the corresponding reaction materials of 1 μm size aluminum powder.
- laser ablation /
- Al-teflon /
- particle size /
- reaction properties

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图 1 装载样品的靶板

Figure 1. Geometric structure of the sample plate

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图 2 激光烧蚀实验系统的光路布局

Figure 2. Optical arrangement of laser ablation experimental system

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图 3 不同颗粒度Al-teflon反应材料的发光图像系列（激光从左侧入射）

Figure 3. Illuminating images of Al-teflon reactive materials with different particle size (laser incident from the left)

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图 4 自发光光强随时间的变化趋势

Figure 4. Trends of self-luminescence intensity with time

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图 5 不同颗粒度的Al-teflon反应材料的发射光谱

Figure 5. Emission spectra of Al-teflon reactive materials with different particle sizes

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图 6 不同颗粒度的Al氧化模型

Figure 6. Oxidation model of Al with different particle sizes

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