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8 9 4                                                      FANG Kuang,CHEN Qingchou,FU Qiubo,WANG Yao

         plesareidentical300μ m,andallthetestswereconductedin    AsitillustratedinFig.6,thereisn′tdistinctdisparityof
         thesamefiringset,thecapacitanceis0.2μ F,thecharging  flyeraccelerationcapabilitybetweenparyleneC andpolyim
         voltage2.6kVandthedischargeduration1.2μ s.           ide.Basedonthispremise,wesetanotherfiringtesttocheck
           Toinvestigatetheinfluenceofcomponentsmaterialonthe  impactoftheepoxybasedphotoresistbarrel(Su8)onthefly
         flyeracceleration capability, we′ve set4 testgroups, the  er′sacceleration.Fig.7givesustheflyeraccelerationdetails
         parameterswerelistedinTable1.Theflyers′accelerationhis  betweendifferentbarrels,Fig.7apolyimideflyer,andFig.7b
         torieshavebeenrecordedbythePDVsystem.                paryleneCflyer.

         Table1 ThesampleparametersofEFI
               foil     barrel         flyer
                               barrel           flyer
         sample thickness  length      thickness
                               material         material
               / μ m     /mm           / μ m
         1 #   3        0.4    Su8     40       polyimide
         2 #   3        0.4    Su8     40       paryleneC
          #
         3     3        0.4    Steel   40       polyimide
         4 #   3        0.4    Steel   40       paryleneC

           Fig.6givesustheaccelerationhistorycomparisonofdif
                                                                               a.polyimideflyer
         ferentflyers,Fig.6aSu8 barrel,Fig.6b Steelbarrel.Asit
         showninFig.6a,itseemsthattheflyeraccelerationprofiles
         matchedwitheachotherquitewell,andforFig.6btheveloci
         tydiscrepancyisnomorethan5%.Thoughthereisadensity
         divergencebetween1.35 g· cm -3  ofparyleneC flyerand
         1.42g·cm -3  ofpolyimideflyer,thedivergencemightbeab
         sorbed by the substrate binding force discrepancy between
         CVD methodandnormalassemblyprocess.



                                                                               b.paryleneCflyer
                                                              Fig.7 FlyervelocitydiagnosticofEFIassembledwithdifferentbarrelmaterial

                                                                AsitshowninFig.7,theEFIwithSu8photoresistbarrel
                                                                   #
                                                                #
                                                              (1,2)provideusthesimilarflyeraccelerationprofilecom
                                                                                                        #
                                                                                                           #
                                                              paringwiththeEFIwhichisconsistofsteelbarrel(3,4 ).
                                                              Thoughtheflyervelocityattheimpactionpoint0.4mm isdif
                                                                                     -1  #              -1  #
                                                              ferentinFig.7b,3454.5m·s (2)and3312.9m·s (4),
                                                              thedisparityiswithin4%.In addition,alltheflyershave
                            a.Su8barrel
                                                              reachedto75% oftheultimatevelocityin thefirst80 ns,
                                                                                                    [6]
                                                              whichisconsistentwith thetestresultofChen ,and the
                                                                                      [7]
                                                              VISARdiagnosticprofileofHatt .
                                                             4.2  InfluencesofFoilThicknessontheFlyerAcceleration
                                                                   Capability
                                                                Toinvestigatetheimpactoffoilthicknessonflyeracceler
                                                              ationcapabilityofintegratedEFI,we′veset2testgroupswith
                                                              differentfoilthickness,butidenticalflyerandbarreldimen
                                                              sion.TheparameterswerelistedinTable2.
                                                                  Theacceleration profilesrecorded bythePDV system
                            b.Steelbarrel
                                                                                                    #
         Fig.6  FlyervelocitydiagnosticofEFIassemblieswithdifferentflyer  wereexhibited in Fig.8,theflyerofsample1 accelerated
                                                                                       #
         material                                             muchfasterthanthatofsample2 atthebeginningofaccelera

         ChineseJournalofEnergeticMaterials,Vol.24,No.9,2016(892-897)  !"#$            www.energeticmaterials.org.cn
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