摘要:
使用X射线衍射、扫描电子显微镜、X射线能谱、比表面和孔隙度等分析方法,对加载货币银爆轰
实验生成样品的成分含量、粒子形貌、形成物相、金属银的晶粒度、比表面及孔隙度进行了分析。结果表明,银
和铜在爆后的粒子中仍然为共熔体,相对金属银,晶格参数减小,生成银粒子的晶粒度为15.9~22.2nm;由
于高温高压和实验环境的影响,银粒子爆后和其他杂质粒子粘结在一起形成较大的颗粒,含有许多其他成分,
氧化亚铁来源于爆炸罐的罐体,大量无定形碳粉来源于缺氧环境下炸药的不完全燃烧,铝和硅来源于实验装
置。对生成样品的形貌分析证明了XRD对银晶粒度的分析结果。因为样品中含有较多量的碳粉,为了弄清
对气体的吸附作用,对样品进行了比表面、孔隙度以及孔径分析。
关键词:
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爆炸力学 /
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固体粒子 /
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爆轰实验 /
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货币银 /
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表征
Abstract:
Themorphology,composition,structure,grainsize,surfacearea,porevolumeandpore
sizeofthedetonationproductswerecharacterizedbyusingdifferenttechniquesincludingtheX-ray
diffraction(XRD),thescanningelectron microscopy(SEM),theX-rayphotoelectronspectroscopy
(EDS)andthespecificsurfaceareaandporosityanalysis.Theresultsshowthatthelatticeconstantof
theeutecticmeltparticlesystemcomposedbysilverandasmallaccountofcopperissmallerthanthat
ofthepuresilver.TheXRDanalysesindicatethatthegrainsizeofthesilverparticlesintheeutectic
meltsystemis15.9~22.2nm.TheSEManalysesrevealthatthebiggerellipsoiddetonationproduct
particlesconsistofsomesmallsmoothsphericalsilverparticlesanddifferentcomponents,theFeOin
whichcomesfromthedetonationvessel,theamorphouscarbonfromtheorganicexplosivecombustioninthesealvessel,
andtheAlandSifromthedetonationfacility.Themorphologyinvestigations
agreewiththeXRDanalyses.Tomakeitclearthatthedetonationproductscontainingsomecarbon
powderactastheroleofadsorption,thesurfacearea,porevolumeandporesizewerealsodiscussed.
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