Qualification Of ITEX-07 Explosive For Fuze Applications
Qualification Of ITEX-07Explosive For Fuze ApplicationsDr. Rainer SchirraDynITEC GmbH(Tel: 49 (0) 2241 208 4929 – email: rainer.schirra@dynitec.com)Jason Fitzgerald-SmithDr. Helmut ZöllnerAlberto CarrilloDynITEC GmbHDynITEC GmbHBAE Systems1
PBXN-7 / ITEX-07 PBXN-7 Composition RDXTATBCopolymer (VITON A)35 %60 %5% Specification MIL-DTL-82874B Qualified by the US-Navy „PBXN-7“ manufactured with OSI-TATB, evaluated by the USNavy, has enhanced shock insensitivenessTo describe its improved IM property, this variant of PBXN-7 forfuture military use has been designated ITEX-07 2
Qualification – Time Schedule DynITEC Physical tests and thermal characteristics(related to detonating devices) Finished Jan 08 Additional tube tests in summer 08 WIWEB Tests according to STANAG 4170 / TL 1376-0800 / AOP-7 Sep 08 – Jan 09 Contracted by DynITEC QinetiQ EMTAP-Tests (No 35, No 41, No 42) Expected in May 09Schutzvermerk nach ISO 16016 beachten3
Friction / 50,070,070,090,090,0110,0110,0130,0130,0Friction [N]Friction [N]150,0150,0170,0170,0190,0190,0NTONTOTest set-ups and procedures according to BAMDetermination of no-go-level:Highest level with no reaction or no detonationin 6 tests.AOP-7 min. requirements for boosterexplosives 80 N for friction and 3 J for 15,0Impact [J]Impact [J]20,020,025,025,04
Ignition BXN-5HNS-HBDHNS-HBDNTONTOTemperatureTemperature[ C][ C]270270290290240240280280 310 310280280Wood‘s Metal Bath Test in accordance with DynITEC-procedure 3010AOP-7 min. requirements for booster explosives 180 C at 5 280,0300,0300,0320,0320,0Temperature [ C]Temperature [ C]5
Minimum Priming Charge Test No-GoNo-Go[mg][mg]GoGo[mg][mg] ITEX-07ITEX-07PB-HMXPB-HMX505090906060100100 RDXRDXPBXN-5PBXN-5303025254040303055 110 losiveExplosiveExplosiveExplosiveSpecial DynITEC-method to evaluate explosives for use indetonating devicesDetermination of the minimum amount of primary explosive to geta reliable initiation of the (secondary) explosive underinvestigationPrimary explosive (lead azide 94oD) is changed in 100,0Lead azide [mg]Lead azide [mg]6
Booster-Gap-TestExplosiveExplosiveTest based on STANAG 4363 and AOP-21Designed for explosive components (boosters and leads)Acceptance criteria for boosters 28mm water TONTO 19201620162021252125 5 er Gap [mm]Water Gap [mm]Booster DM 1291; Loading pressure: 0,7 kbar7
Tube Test – Electrically Heated Slow Heating (EMTAP No 42)Test results Heating rate 1 K/minReaction time 2:49 [h:m]Reaction temperatureca. 195 CSix fragmentsReaction type: Cat 2Deflagration8
Tube Test – Fast Heating (EMTAP No 41)Test results Reaction after 339 s Two fragmentsReaction type: Cat 2 Comparable to Rowanex 3601Schutzvermerk nach ISO 16016 beachten9
Tube Test – Internal Ignition (EMTAP No 35)Test resultsTest results No fragmentsReaction after 339 sReaction type: Cat 1Two fragmentsComparable to Rowanex 3601Reaction type: Cat 2 Comparable to Rowanex 3601Schutzvermerk nach ISO 16016 beachten10
WIWEB Test ResultsCharacteristicDoc.Test(STANAG)Criteria for booster explosives(AOP-7)WIWEBDynITECGas liberation 1.0 ml/g at 100 C for 40 h./.24 h:100 C: 0.04 ml/2.5g150 C: 2.5 ml/2.5gDSC orDecomposition exotherm peak: 180 C at a heating rate of 5 C/min 180 C233.8 Cok231 C 32 J7,5 J80 N 7690 m/sok(4 weeks / 80 C)ok(270 C)./.20 J96 N./.STANAG 4170Vacuum Stability4556Thermal Characterisation4515Ignition TemperatureElectrostatic SensitivityImpact SensitivityFriction SensitivityDetonation VelocityVariation of propertieswith ageExplosive responsewhen ignited4491449044894487AOP-7TGAWood's Metal BathSmall-scale spark testBAM-TestBAM-Test 180 C at a heating rate of 5 C/minNational3 J: No reaction (10 out of 10 trials)80 N: No reaction (10 out of 10 trials)AOP-74491./.see EMTAP-testsTL 1376-0800Criteria for insensitive explosivesFast Cook Off(90 K/min)HeatingCaliber 12.7 mmvo 900 m/sDistance 6 mGap testDiameter: 21 mmImpactShockReaction type 5 (burn)Type 5Reaction type 5 (burn)Type 6No detonation 15 mmto be determinedEMTAP (Tube Tests)Internal IgnitionFast HeatingElectrically HeatedNo 35No 41No 42Reaction category 2Reaction category 2Reaction category 21 Test performed: Cat 11 Test performed: Cat 21 Test performed: Cat 211
Summary ITEX-07 is qualified according to STANAG 4170. Preliminary EMTAP-tests show excellent IM-properties less than or equal todeflagration Cat 2 reaction. Thermal behaviour is dominated by RDX: separate investigation & report. Material used for the insensitive booster of the new UK multi-purpose artilleryfuze L166A1 (production starts in summer 2009). ITEX-07 is currently being allocated an EX-number by the US DoD.12
Thermal Stability (heating ramp)Heating rate:3 K/hSample volume: 8 cm3 cube13
Thermal Stability (isoperibolic)Tisoperibolic:195 CSample volume: 1,7 cm3 cube14
Volume-dependent self-ignition temperatures for ITEX-07VolumeSITexpT Ukrit.,theoret.0,2 cm3L 0,003 m203 C203 C1,0 cm3L 0,005 m197 C197 C1,7 cm3L 0,006 m194 C195 C8 cm3L 0,01 m190 C190 CSITexp:Self-ignition temperature determined by experimentT Ukrit.,theoret.: Self-ignition temperature according to the thermal explosion theory15
Volume-dependent self-ignition temperatures (acc. to thermalexplosion theory)16
Booster-Gap-Test: Experimental SetupWitness rodFiring setupHolderHolderFiring setupCenter discBoosterWater gapPMMA-tubeDonor chargeDetonator No.8Donor charge (RDX)Firing setupSchutzvermerk nach ISO 16016 beachten17
Minimum Priming Charge Test Special DynITEC method toevaluate explosives for use indetonating devicesDetermination of the minimumamount of primary explosiveto get a reliable initiation of the(secondary) explosive underinvestigationPrimary explosive (lead azide94oD) is changed in 5mgintervallsDrop ballFiring pinPlastic holderMetal tubeStab sensitive chargeLead azideSecondary explosiveWitness plateBaseSchutzvermerk nach ISO 16016 beachten18
Tube Test – Fast Heating (EMTAP No 41) Test results Reaction after 339 s Two fragments Reaction type: Cat 2 Comparable to Rowanex 3601. Schutzvermerk nach ISO 16016 beachten. 10 Tube Test – Internal Ignition (EMTAP No 35) Test results Reaction after 339 s
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