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含能材料  2015 

一种弹药PBX装药的贮存老化机理及安全性

DOI: 10.11943/j.issn.1006-9941.2015.11.003

Keywords: 高聚物粘结炸药(PBX) 贮存老化 降解 老化机理 撞击感度

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Abstract:

运用CT扫描了贮存4、8、12、16年高聚物粘结炸药(PBX)弹药装药结构, 采用重量分析法, 液体静力称量法和红外光谱分析了不同贮存年限装药的组成、密度及析出物, 利用扫描电镜观察贮存4、12、16年弹药装药微观结构, 测试弹药装药撞击感度。结果表明, 装药逐渐出现裂纹、孔洞、空腔等老化现象, 由固态变为粘稠态, 并有硅橡胶析出; 装药密度及组分中HMX含量由贮存4年时的1.56 g·cm-3、85%逐渐提高到16年时的1.66 g·cm-3、95%;装药断面由平整光滑逐渐变为凸凹不平。裂纹可能是因炸药颗粒与粘结剂发生脱离, 内部微裂纹扩展引起, 孔洞、空腔等老化现象可能是粘结剂大分子网状结构降解成环状小分子引起。老化使装药撞击感度由贮存4年时的8%逐渐提高到16年时的44%

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