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含能材料  2011 

HMX晶体内部孔隙率、缺陷类型及颗粒度对冲击波感度的影响

DOI: 10.3969/j.issn.1006-9941.2011.06.008

Keywords: 爆炸力学,HMX,晶体特性,冲击波感度

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Abstract:

采用标准隔板试验方法分别研究了HMX的晶体内部空隙(用晶体表观密度表征)、颗粒度、形貌和缺陷类型对冲击波感度的影响规律。冲击波感度测试采用隔板试验,药柱配方为HMX/食用油(76/24),药柱采用液体填充方式制备。隔板试验研究表明:随着非孪晶HMX晶体表观密度在1.8992~1.9016g·cm-3范围内增加,炸药配方的冲击波感度降低,隔板厚度从15.5mm降到13.2mm,晶体内部空隙率与隔板厚度基本成线性关系;当晶体表观密度基本相近时,在20~650μm粒度范围内,随着颗粒度的增加,非孪晶HMX炸药配方的冲击波感度增加,隔板厚度从13.0mm升到14.3mm;无论是粗颗粒还是细颗粒,含有孪晶缺陷HMX的冲击波感度显著高于非孪晶HMX;当晶体表观密度和颗粒尺寸相近时,晶体颗粒的外观形貌对炸药冲击波感度影响不大。

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