%0 Journal Article
%T Mg-Al／PTEE烟火药爆炸性能的研究（英）
%A Bogdan
%A ZYGMUNT
%J 含能材料
%D 2007
%X Theobjectoftheresearchareexplosivepropertiesofthepyrotechniccompositeconsistoffinegrademagnesium-aluminiumpowder(PAM)andhighlydispersedpolytetrafluorethylene(PTFE).Thecompositerevealshighresistancetoallmechanicalandthermalimpulsesandisextremelysensitivetohotsparksandopenfire.Theburningrateofthecompositionchangesfrom1cm·s-1to100m·s-1alongwithdecreasingitsdensity.Chargesofthecompositionwithdensitybelow1g·cm-3burnsoviolently,thatthephenomenaissimilartoexplosion.Chargeswithdensityabove1.1g·cm-3burnrelativelyrapidlyandstably.Themainpartofthepaperconcernsthepressureimpulsesintheairgeneratedduringhigh-rateburningofthecompositionofbulkdensity.Thenatureofthegeneratedpressureimpulseisnotthatofatypicalshockwave.Ariseofpressureoverthedistancefromthepointofexplosiontothemaximumvaluelasts50-100milliseconds,whileforshockwavesthisfactorislessthanamicrosecondforequivalentcharges.Themethodsofinitiationofthecompositioninfluencetheshapeandparametersofthepressureimpulse.Theexplanationofthenatureofgreatchangesofthecompositionburningratehasbeenproposed.Theeffectdescribedinthepaperwasusedforevaluationofexplosivepressureresistanceofindustrialdoorsandwindows.
%K PTFEasoxidizer
%K high-ratecombustion
%K blastwave
%K explosivepressureresistance(EPR)
%U http://www.energetic-materials.org.cn/hncl/ch/reader/view_abstract.aspx?file_no=20070609&flag=1