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Investigation of the Thermal Aging Behavior of Pyrotechnic Tracer Composition by Spectroscopic Techniques Coupled with Principal Component Analysis
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-04-15 , DOI: 10.1002/prep.202100019 Slimane Bekhouche 1 , Djalal Trache 1 , Salim Chelouche 1 , Amir Abdelaziz 1 , Ahmed Fouzi Tarchoun 1, 2 , Widad Benchaa 1 , Sabrine Benameur 1 , Abderrahmane Mezroua 1
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-04-15 , DOI: 10.1002/prep.202100019 Slimane Bekhouche 1 , Djalal Trache 1 , Salim Chelouche 1 , Amir Abdelaziz 1 , Ahmed Fouzi Tarchoun 1, 2 , Widad Benchaa 1 , Sabrine Benameur 1 , Abderrahmane Mezroua 1
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This work aims to investigate the aging behavior related to heat of a pyrotechnic tracer composition (PTC) sample composed of strontium nitrate as an oxidizer and dual-fuel of Mg and Mg−Al alloy. Fresh and thermally aged samples were examined using nondestructive spectroscopic techniques, namely Raman spectroscopy, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The obtained results showed that aging for 20, 40, and 60 days at 65 °C does not provoke noticeable chemical or structural changes, whereas, after 60 days, the changes are visible, and become more obvious after aging for 120 days. These changes are caused by the partial decomposition of strontium nitrate and the oxidation of magnesium, which are followed by the generation of degradation products such as Sr(NO2)2, MgO, and Mg(OH)2. On the other hand, the applicability of FTIR and XRD associated with a chemometric tool, the principal component analysis, as a simple and useful technique has been also assessed to discriminate the spectra of the aged samples. It has been revealed that these combined approaches can be effectively used to recognize the main compositional and structural changes within the pyrotechnic tracer composition affected by the thermal degradation process.
中文翻译：
用光谱技术结合主成分分析研究烟火示踪剂组合物的热老化行为
这项工作旨在研究与热相关的烟火示踪剂成分 (PTC) 样品的老化行为，该样品由硝酸锶作为氧化剂和镁和镁铝合金的双燃料组成。使用无损光谱技术检查新鲜和热老化样品，即拉曼光谱、扫描电子显微镜 (SEM)、傅里叶变换红外光谱 (FTIR) 和 X 射线衍射 (XRD)。获得的结果表明，在 65°C 下老化 20、40 和 60 天不会引起明显的化学或结构变化，而在 60 天后，变化是可见的，并且在老化 120 天后变得更加明显。这些变化是由硝酸锶的部分分解和镁的氧化引起的，随后生成Sr(NO2 ) 2、MgO和Mg(OH) 2。另一方面，还评估了 FTIR 和 XRD 与化学计量工具（主成分分析）作为一种简单而有用的技术相关的适用性，以区分老化样品的光谱。已经表明，这些组合方法可以有效地用于识别受热降解过程影响的烟火示踪剂成分内的主要成分和结构变化。
更新日期：2021-04-15
中文翻译：
用光谱技术结合主成分分析研究烟火示踪剂组合物的热老化行为
这项工作旨在研究与热相关的烟火示踪剂成分 (PTC) 样品的老化行为，该样品由硝酸锶作为氧化剂和镁和镁铝合金的双燃料组成。使用无损光谱技术检查新鲜和热老化样品，即拉曼光谱、扫描电子显微镜 (SEM)、傅里叶变换红外光谱 (FTIR) 和 X 射线衍射 (XRD)。获得的结果表明，在 65°C 下老化 20、40 和 60 天不会引起明显的化学或结构变化，而在 60 天后，变化是可见的，并且在老化 120 天后变得更加明显。这些变化是由硝酸锶的部分分解和镁的氧化引起的，随后生成Sr(NO2 ) 2、MgO和Mg(OH) 2。另一方面，还评估了 FTIR 和 XRD 与化学计量工具（主成分分析）作为一种简单而有用的技术相关的适用性，以区分老化样品的光谱。已经表明，这些组合方法可以有效地用于识别受热降解过程影响的烟火示踪剂成分内的主要成分和结构变化。
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