爆速对纳米铝粉爆炸烧结性能的影响

桑圣军; 郭浩哲; 李斌; 王永旭; 王志平; 解立峰

doi:10.11858/gywlxb.20170581

爆速对纳米铝粉爆炸烧结性能的影响

doi: 10.11858/gywlxb.20170581

1.
南京理工大学安全工程系, 江苏南京 210094
2.
四平市高斯达纳米材料设备有限公司, 吉林四平 136001

基金项目:

国家国际科技合作专项项目 2013DFR0080

江苏省科技支撑计划项目 BE2014735

详细信息

作者简介:
桑圣军(1992—), 男, 硕士研究生, 主要从事工程力学研究.E-mail:ssjiphx@sina.cn

通讯作者:
解立峰(1965—), 男, 博士, 教授, 主要从事爆炸力学应用研究.E-mail:xielifeng319@sina.com

中图分类号: O389;TG392
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出版历程
- 收稿日期: 2017-05-15
- 修回日期: 2017-05-21

Influence of Detonation Velocity on Sintering Performance of Nano-Aluminum Powders

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2.
Siping GaoSiDa Nanometer Materials Equipment Co.Ltd., Siping 136001, China

摘要

摘要: 为了掌握纳米金属粉烧结成型技术, 将纳米铝粉置于改良设计的可泄压式爆炸烧结装置中, 得到了密实度达98%以上的纳米铝棒。通过改变铵梯炸药和木粉的比例调节炸药的爆速, 研究了不同爆速下烧结铝棒的性能。利用金相显微镜观察烧结棒的微观结构, 并对烧结棒的密实度、硬度等性能进行测量。结果表明:通过降低爆速可以减小马赫孔的产生, 但爆速过低, 会导致烧结棒的密实度和硬度等性能降低; 当采用爆速为2 158 m/s的炸药时, 可制得无马赫孔、高硬度、高密实度、晶粒细小的均质烧结棒。
- 爆炸烧结 /
- 纳米铝粉 /
- 爆速 /
- 马赫孔
Abstract: An aluminum bar with a dense degree of over 98% was fabricated using nano-aluminum powders in an improved sintering device capable of pressure relief to study the sintering molding of nanometer metal powders.First, the performance of the sintering aluminum bar at different detonation velocities were obtained by adjusting the ratio of the ammonium nitrate explosive to the wood powder.Then the microstructures of the aluminum bars were observed using metallurgical microscopy, and such mechanical properties as the density and hardness were measured.The results show that the Mach-hole can be reduced by reducing the detonation velocity.However, the excessively low detonation velocity decreases the mechanical properties such as the density and the hardness.Moreover, the sintering aluminum bar that is free from any Mach-hole, of higher hardness, higher dense degree and finer grain size can be fabricated from nano-aluminum powers whose detonation velocity reaches 2 158 m/s.
- explosive sintering /
- nano-aluminum powers /
- detonation velocity /
- Mach-hole

HTML全文

图 1 爆炸烧结装置

Figure 1. Device of explosive sintering

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图 2 纳米铝粉扫描电镜图

Figure 2. SEM image of nano aluminum powders

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图 3 爆轰烧结实验场地

Figure 3. Experiment field of explosive sintering

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图 4 爆炸烧结铝棒初成品

Figure 4. Initial aluminium bar of explosive sintering

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图 5 金相显微图

Figure 5. Metallographic micrograph

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图 6 维氏硬度测量

Figure 6. Measurements of Vickers hardness

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表 1 爆速测试实验结果

Table 1. Experiment results of the detonation velocity

No.	L/mm	d/mm	w/%	D′/(m·s^-1)
1	200	20	0	3 015
2	200	20	5.0	2 460
3	200	20	7.5	2 278
4	200	20	10.0	2 158
5	200	20	12.5	2 016
6	200	20	15.0	1 832

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表 2 不同爆速下爆炸烧结铝棒的密度和密实度

Table 2. Density and dense degree of sintered aluminum bar with different explosive velocities

w/%	D′/(m·s^-1)	ρ/(g·cm^-3)	Dense degree/%
7.5	2 278	2.671	98.9
10.0	2 158	2.692	99.7
12.5	2 016	2.652	98.2

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