|本期目录/Table of Contents|

[1]贾林,张林军,常海,等.A-IX-Ⅱ炸药柱的湿热老化行为[J].火炸药学报,2017,40(4):70-75.[doi:10.14077/j.issn.1007-7812.2017.04.013]
 JIA Lin,ZHANG Lin-jun,CHANG Hai,et al.Hygrothermal Aging Behaviors of A-IX-Ⅱ Explosive Grain[J].,2017,40(4):70-75.[doi:10.14077/j.issn.1007-7812.2017.04.013]
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A-IX-Ⅱ炸药柱的湿热老化行为()
     
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《火炸药学报》[ISSN:1007-7812/CN:61-1310/TJ]

卷:
40卷
期数:
2017年第4期
页码:
70-75
栏目:
出版日期:
2017-08-30

文章信息/Info

Title:
Hygrothermal Aging Behaviors of A-IX-Ⅱ Explosive Grain
作者:
贾林 张林军 常海 张冬梅 李晓宇 陆洪林 岳璞
西安近代化学研究所, 陕西 西安 710065
Author(s):
JIA Lin ZHANG Lin-jun CHANG Hai ZHANG Dong-mei LI Xiao-yu LU Hong-lin YUE Pu
Xi’an Modern Chemistry Research Institute, Xi’an 710065, China
关键词:
物理化学湿热老化炸药装药老化行为尺寸效应含铝炸药RDX基压装炸药
Keywords:
physical chemistryhygrothermal agingexplosive chargeaging behaviorsize effectaluminized explosiveRDX-based pressed explosive
分类号:
TJ55;O64
DOI:
10.14077/j.issn.1007-7812.2017.04.013
文献标志码:
-
摘要:
为了研究含Al和RDX压装混合炸药装药对湿热环境的适应性,将Ф20mm、Ф40mm、Ф60mm、Ф84mm的A-IX-Ⅱ压装炸药柱在71℃、相对湿度65%的环境条件下老化52d,跟踪记录了药柱的体积、抗压强度、质量、Al粉活性、分解热、真空安定性(VST)、爆发点随老化时间的变化,并用X线断层摄影仪、扫描电镜观察其微观结构。结果表明,湿热老化使药柱体积发生不可逆膨胀、抗压强度变小、部分Al粉被氧化、分解热降低,老化初始阶段变化较快,老化7d后变化趋缓;老化52d后爆发点温度没有明显降低,VST放气量没有增加,表明炸药的热安定性没有退化;药柱的结构完整性存在尺寸效应,直径在60~84 mm存在临界值,大于临界值的药柱老化后内部容易产生裂纹;老化后钝感黏结剂破碎、脱粘,导致药柱的抗压强度变小;老化后部分Al粉失活,使得炸药的分解热减少。
Abstract:
To study the hygrothermal environment adaptation of pressed mixed explosive charge with Al and RDX, pressed A-IX-Ⅱ explosive grains with Ф20mm, Ф40mm, Ф60mm and Ф84mm were aged 52 days under the environmental conditions of 71℃ and relative humidity of 65%, the changes in volumes, compressive strength, mass, aluminum powder activity, decomposition heat, vacuum stability test (VST) and explosion temperature of the grains with time were tracked and recorded. Their microstructures were observed by X-ray computed tomography and scanning electron microscope.The results show that hygrothermal aging makes the volumes of grains occur irreversible expansion, compressive strength decrease, part of Al powder be oxidized,and decomposition heat decrease,which change rapidly in the initial stage of aging and slowly after aging 7 days, explosion temperature does not reduce significantly and the amount of gas of VST does not increase after aging 52 days, indicating that the thermal stability of the grain is not degraded. The structure integrality of grain has size effect, there exists a critical value of 60-84 mm in diameter, grains are easy to generate internal crack when their diameters are greater than the critical value of aging. The insensitive binder breakage and debonding after aging cause the decrease of compressive strength of grain and inactivation of part of Al powder, making the decomposition heat of explosive reduce.

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备注/Memo

备注/Memo:
收稿日期:2016-03-09;改回日期:2016-03-22。
基金项目:国防科技工业技术基础项目(No.Z092012T001)
作者简介:贾林(1970-),女,高级工程师,从事火炸药理化性能和环境适应性研究。E-mail:1169855351@qq.com
通讯作者:常海(1962-),男,研究员,从事含能材料结构与性能研究。E-mail:chang_hai_2011@126.com
更新日期/Last Update: 2017-08-30