Deconsolidation and combustion performance of thermally consolidated propellants deterred by multi-layers coating  

作　　者：Zheng-gang XIAO San-jiu YING Fu-ming XU 

机构地区：[1]School of Chemical Engineering,Nanjing University of Science and Technology

出　　处：《Defence Technology（防务技术）》2014年第2期101-105,共5页Defence Technology

基　　金：supported in part by the National Natural Science Foundation of China(No.51376092)

摘　　要：Both heating and solvent-spray methods are used to consolidate the standard grains of double-base oblate sphere propellants plasticized with triethyleneglycol dinitrate(TEGDN)(TEGDN propellants) to high density propellants.The obtained consolidated propellants are deterred and coated with the slow burning multi-layer coating.The maximum compaction density of deterred and coated consolidated propellants can reach up to 1.39 g/cnv.Their mechanic,deconsolidation and combustion performances are tested by the materials test machine,interrupted burning set-up and closed vessel,respectively.The static compression strength of consolidated propellants deterred by multi-layer coating increases significantly to 18 MPa,indicating that they can be applied in most circumstances of charge service.And the samples are easy to deconsolidate in the interrupted burning test.Furthermore,the closed bomb burning curves of the samples indicate a two-stage combustion phenomenon under the condition of certain thickness of coated multi-layers.After the outer deterred multi-layer coating of consolidated samples is finished burning,the inner consolidated propellants continue to bum and breakup into aggregates and grains.The high burning progressivity can be carefully obtained by the smart control of deconsolidation process and duration of consolidated propellants.The preliminary results of consolidated propellants show that a rapid deconsolidation process at higher deconsolidation pressure is presented in the dynamic vivacity curves of closed bomb test.Higher density and higher macro progressivity of consolidated propellants can be obtained by the techniques in this paper.Both heating and solvent-spray methods are used to consolidate the standard grains of double-base oblate sphere propellants plasticized with triethyleneglycol dinitrate （TEGDN） （TEGDN propellants） to high density propellants. The obtained consolidated propellants are deterred and coated with the slow burning multi-layer coating. The maximum compaction density of deterred and coated consolidated propellants can reach up to 1.39 g/cm3. Their mechanic, deconsolidation and combustion performances are tested by the materials test machine, interrupted burning set-up and closed vessel, respectively. The static compression strength of consolidated propellants deterred by multi-layer coating increases significantly to 18 MPa, indicating that they can be applied in most circumstances of charge service. And the samples are easy to deconsolidate in the interrupted burning test. Furthermore, the closed bomb burning curves of the samples indicate a two-stage combustion phenomenon under the condition of certain thickness of coated multi-layers. After the outer deterred multi-layer coating of consolidated samples is finished burning, the inner consolidated propellants continue to burn and breakup into aggregates and grains. The high burning progressivity can be carefully obtained by the smart control of deconsolidation process and duration of consolidated propellants. The preliminary results of consolidated propellants show that a rapid deconsolidation process at higher deconsolidation pressure is presented in the dynamic vivacity curves of closed bomb test. Higher density and higher macro progressivity of consolidated propellants can be obtained by the techniques in this paper.

关 键 词：燃烧性能 推进剂 多层涂布 拆分 材料试验机 热固 多层涂层 乙二醇酯 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程] TQ560.1[化学工程—炸药化工]