Pub Date : 2016-06-25DOI: 10.14077/j.issn.1007-7812.2016.03.009
Niu Guo-tao, Hao Jing, Jin Da-yong, Zhang Dong-mei, N. Lei, Cao Shao-ting
To research the effect of aging on the explosive performances,the accelerated aging test of three kinds of melt-cast explosives TNT/RDX,TNT/RDX/Al and TNT/HMX/Al stockpiled for a period of time were carried out.The micro morphology and safety properties of these explosives before and after aging were studied by scanning electron microscopy and vacuum stability test(VST).The mechanical sensitivities and detonation velocities of these explosives before and after aging were tested.The results show that after aging,the color of explosives becomes dark,the volume is expanded,and the mass is decreased.The amount of evolved gas of samples is less than 2mL/g.The thermal sensitivity of samples also has smaller change.The change in mechanical sensitivity is related to the components and aging mode of explosive.For the TNT/RDX,the detonation velocity gradually decreases with increasing the storage time,which is consistent with that of overall accelerated aging.The change trend of heat of detonation with increasing the storage time for the TNT/RDX/Al and TNT/HMX/Al is opposite,revealing that the aging mechanism may be different.
{"title":"Effect of Aging on the Performances of TNT Based Melt-cast Explosives","authors":"Niu Guo-tao, Hao Jing, Jin Da-yong, Zhang Dong-mei, N. Lei, Cao Shao-ting","doi":"10.14077/j.issn.1007-7812.2016.03.009","DOIUrl":"https://doi.org/10.14077/j.issn.1007-7812.2016.03.009","url":null,"abstract":"To research the effect of aging on the explosive performances,the accelerated aging test of three kinds of melt-cast explosives TNT/RDX,TNT/RDX/Al and TNT/HMX/Al stockpiled for a period of time were carried out.The micro morphology and safety properties of these explosives before and after aging were studied by scanning electron microscopy and vacuum stability test(VST).The mechanical sensitivities and detonation velocities of these explosives before and after aging were tested.The results show that after aging,the color of explosives becomes dark,the volume is expanded,and the mass is decreased.The amount of evolved gas of samples is less than 2mL/g.The thermal sensitivity of samples also has smaller change.The change in mechanical sensitivity is related to the components and aging mode of explosive.For the TNT/RDX,the detonation velocity gradually decreases with increasing the storage time,which is consistent with that of overall accelerated aging.The change trend of heat of detonation with increasing the storage time for the TNT/RDX/Al and TNT/HMX/Al is opposite,revealing that the aging mechanism may be different.","PeriodicalId":10141,"journal":{"name":"Chinese Journal of Explosives and Propellants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90514969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-01-01DOI: 10.14077/J.ISSN.1007-7812.2016.05.003
A. K. Hussein, S. Zeman, M. Sućeska, M. Jungová
Several mixtures, based on urea, urea derivatives some inorganic oxidants, including also aluminia, were studied by means of ballistics mortar with TNT as a reference standard. The Detonation pressure (P), detonation velocity (D), detonation heat (Q) and volume of gaseous product at standard temperature and pressure conditions (STP condition) were calculated using Explo5 V6.3 thermochemical code. The performance of the mixtures studied was discussed in relation to their thermal reactivity, determined by means of differential thermal analysis (DTA) . It is shown that the presence of hydrogen peroxide in the form of its complex with urea (i.e. as UHP) has positive influence on the explosive strength of the corresponding mixtures which is linked to the hydroxy-radical formation in the mixtures during their initiation reaction. These radicals may might initiate (at least partially) powdered aluminium into oxidation in the CJ plane of the detonation wave. Mytures containing UHP and magnesium are dangerous because of potential auto-ignition.
{"title":"Relative explosive strength of some explosive mixtures containing urea and/or peroxides","authors":"A. K. Hussein, S. Zeman, M. Sućeska, M. Jungová","doi":"10.14077/J.ISSN.1007-7812.2016.05.003","DOIUrl":"https://doi.org/10.14077/J.ISSN.1007-7812.2016.05.003","url":null,"abstract":"Several mixtures, based on urea, urea derivatives some inorganic oxidants, including also aluminia, were studied by means of ballistics mortar with TNT as a reference standard. The Detonation pressure (P), detonation velocity (D), detonation heat (Q) and volume of gaseous product at standard temperature and pressure conditions (STP condition) were calculated using Explo5 V6.3 thermochemical code. The performance of the mixtures studied was discussed in relation to their thermal reactivity, determined by means of differential thermal analysis (DTA) . It is shown that the presence of hydrogen peroxide in the form of its complex with urea (i.e. as UHP) has positive influence on the explosive strength of the corresponding mixtures which is linked to the hydroxy-radical formation in the mixtures during their initiation reaction. These radicals may might initiate (at least partially) powdered aluminium into oxidation in the CJ plane of the detonation wave. Mytures containing UHP and magnesium are dangerous because of potential auto-ignition.","PeriodicalId":10141,"journal":{"name":"Chinese Journal of Explosives and Propellants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80034377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-01-01DOI: 10.14077/J.ISSN.1007-7812.2015.02.017
Gao Ming, Guo Xiaoyan, Zou Meishuai, Yang Rong-jie
{"title":"Combustion performances of Mg-Al alloy hydro-reactive metal fuel propellant","authors":"Gao Ming, Guo Xiaoyan, Zou Meishuai, Yang Rong-jie","doi":"10.14077/J.ISSN.1007-7812.2015.02.017","DOIUrl":"https://doi.org/10.14077/J.ISSN.1007-7812.2015.02.017","url":null,"abstract":"","PeriodicalId":10141,"journal":{"name":"Chinese Journal of Explosives and Propellants","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76363329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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