火炸药学报

为了研究推进剂中金属燃料对氧化剂高氯酸铵(AP)反应特性的影响,选取两种铝基金属燃料—铝锂合金和铝镁合金,借助TG-DSC、SEM、XRD以及自制燃烧实验装置等设备,对样品释能过程及反应特性进行了分析,并采用Kissinger法计算了样品的表观活化能。结果表明,铝锂合金对AP低温分解阶段和高温分解阶段皆存在抑制效果,使得其两个阶段的分解放热峰峰温升高; 铝镁合金对AP低温分解阶段有较强的促进作用,使得AP低温分解峰峰温降至287.3℃。当加入铝锂合金后,AP低温分解表观活化能为129.7kJ/mol,高温分解表观活化能约为247.0kJ/mol; 而加入铝镁合金后,AP低温分解表观活化能降为负数(-207.2kJ/mol); AP/铝镁合金中AP的分解剧烈,样品燃烧时观察到了较大的气相火焰,其燃烧过程中铝、镁基本能完全反应,而AP/铝锂合金的燃烧产物检测到了铝单质。

To investigate the effects of metal fuels on the reactions of ammonium perchlorate(AP)oxidizer in propulsion systems, the energy release processes and reaction characteristics of two aluminum-based metal fuels, namely Al-Li alloy and Al-Mg alloy, were analyzed by TG-DSC, SEM, XRD, and a custom-designed combustion apparatus. The apparent activation energy was calculated by Kissinger method. The results reveals that the Al-Li alloy exhibits inhibitory effects on both the low-temperature and high-temperature decomposition stages of AP, which elevates decomposition peak temperatures for both stages. In contrast, the Al-Mg alloy has a strong promoting effect on the low-temperature decomposition stage of AP, lowering the decomposition peak temperature to 287.3℃. The addition of Al-Li alloy results in an apparent activation energy of 129.7kJ/mol for the first decomposition stage of AP and approximately 247.0kJ/mol for the second stage. Conversely, the addition of Al-Mg alloy leads to a negative apparent activation energy(-207.2kJ/mol)for the first decomposition stage of AP. Additionally, in the Al-Mg alloy/AP system, a vigorous decomposition of AP is observed, accompanied by the generation of a prominent gaseous flame during sample combustion. In this process, aluminum and magnesium are nearly fully consumed. However, in the Al-Li alloy/AP system, aluminum is still detected among the combustion products.

引言
1 实验
2 结果与讨论
3 结论

图1 铝锂合金和铝镁合金的XRD与SEM图<br/>Fig.1 XRD and SEM images of Al-Li alloy and Al-Mg alloy

图1 铝锂合金和铝镁合金的XRD与SEM图
Fig.1 XRD and SEM images of Al-Li alloy and Al-Mg alloy

图2 两种合金粉末在空气中的TG-DSC曲线<br/>Fig.2 TG-DSC curves of the Al alloy powders in air

图2 两种合金粉末在空气中的TG-DSC曲线
Fig.2 TG-DSC curves of the Al alloy powders in air

图3 样品在氩气中的TG-DSC曲线<br/>Fig.3 TG-DSC curves of thesamples in Ar

图3 样品在氩气中的TG-DSC曲线
Fig.3 TG-DSC curves of thesamples in Ar

图4 不同升温速率下样品的DSC曲线<br/>Fig.4 DSC curves of the samples at different heating rates

图4 不同升温速率下样品的DSC曲线
Fig.4 DSC curves of the samples at different heating rates

图5 AP/铝锂合金不同分解阶段的ln((β)/(T2))对-(1000)/(RT)的拟合曲线<br/>Fig.5 The fitting results of ln((β)/(T2)) vs-(1000)/(RT) for AP/Al-Li alloy at different decomposition stages

图5 AP/铝锂合金不同分解阶段的ln((β)/(T2))对-(1000)/(RT)的拟合曲线
Fig.5 The fitting results of ln((β)/(T2)) vs-(1000)/(RT) for AP/Al-Li alloy at different decomposition stages

表1 AP反应的热力学参数<br/>Table 1 Kinetic parameters of AP

表1 AP反应的热力学参数
Table 1 Kinetic parameters of AP

图6 AP/铝镁合金ln((β)/(T2))对-(1000)/(RT)的拟合曲线<br/>Fig.6 The fitting curve of ln((β)/(T2)) vs -(1000)/(RT) for AP/Al-Mg alloy

图6 AP/铝镁合金ln((β)/(T2))对-(1000)/(RT)的拟合曲线
Fig.6 The fitting curve of ln((β)/(T2)) vs -(1000)/(RT) for AP/Al-Mg alloy

图7 样品的燃烧过程<br/>Fig.7 Combustion process of the samples

图7 样品的燃烧过程
Fig.7 Combustion process of the samples

图8 样品燃烧时的光谱辐射曲线<br/>Fig.8 Emission spectra of the samples during combustion

图8 样品燃烧时的光谱辐射曲线
Fig.8 Emission spectra of the samples during combustion

图9 AP/铝锂合金与AP/铝镁合金样品的燃烧产物特性<br/>Fig.9 Characteristics of the combustion products

图9 AP/铝锂合金与AP/铝镁合金样品的燃烧产物特性
Fig.9 Characteristics of the combustion products

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引言

1 实验

2 结果与讨论

3 结论

期刊信息

备注

引言

1 实 验

2 结果与讨论

3 结 论

期刊信息

1 实验

3 结论