碳化硅增强泡沫铝层合圆管的制备及其力学性能研究

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1、碳化硅增强泡沫锓鼷合匮管鳇铡备及其力学性缝研究藕要褥SiC鬏粒增强铝罄复合耪辩懿铡备技零与逡滚锯溶薅发泡技零耜结合，探索了制备SiC颗粒增强泡沫铝基复仑材料的工艺方法。讨论了SiC颗粒与铝慧俸之蠲存在麴润漫蛙、秀嚣发应以及SiC颗粒在熔{奉中溅终等酒嚣，逶过选撵合适的合会成分、对SiC颗粒进行预处理、采用特定搅拌和发泡工艺等一系列工艺方案成功予以解决。在熔髂发泡过程中，透避严搐控剡发泡湛度、搅搀遮度和搅拌时间等工艺参数，制得了孔隙率纂本可调、SiC颗粒和孔洞分布均匀的泡、徕铝样品。雳熔体发泡法帝4备了碳亿醚颗粒增强泡沫铝样晶，分析其在准静态压缩条件下的变形行为。研究波明，

2、碳化硅颗粒增强泡沫铝的屈服强度约程5～12MPa之黼，怼泡沫铝榜精酶力学毪髓有着筏显的增强{乍蘼。用碳化硅颗粒增强泡沫铝为夹芯，不锈钢圆管为面板制备层合圆管，研究了滢台藩管在溱静态篷缭条彳孛下戆缀羯秘横肉交彭行为蠢煞蘩啜救经能。磊秀究表明，屡合圆管的纵向压缩变形方式与空管相比发生了改变，由不对称变形模式交为麓慰嚣变形壤式；载萄-璁移錾线平台段锯齿形波动与熬震蘸戆澎或整现对应关系：层合圆管纵向和横向的吸能能力均远大于不锈钢圆管和泡沫铝吸收躬能量之和，并恳随着皮变的增期，鼷台圆麓；戆吸黢能力增麓更燕快速；缀合圆管在保持泡沫铝轻质的同时，在纵向和横向两个方向上均大幅度提高泡沫铝

3、的暇能能力，因两在吸髓、防护等领域具有广蜩的盛愆前景。关键词：碳化硅；泡沫铝；熔体发泡；层合圆管；力学性能{吸能性能FabricationofSiCParticle-ReinforcedAluminumFoamCylinderSandwichandTheStudyofItsmechanicalpropertyAbstract壹，培ispaperthefabricatingprocessofSiCpreinforced嚣国躇赫￡i{嚣foammatrixcompositewasstudiedbycombiningthefiabdeatingprocessofaluminum

4、matrixcompositereinforcedbySiCparticlesandthemeltingfoamingprocessofaluminumfoam．飘持sinkingproblemofSiCparticlesinthealuminummelt，thewettabilltyandtheinterfaeereactionbetweenSiCparticlesandthealuminumwerediscussedandsolvedsuccessfifllybychoosingproperalloyelements,pretreatingofSiCp,usingsp

5、ecialstirringandfoamingprocess．Theresultshowsthattheporosityispartlyadjustable．thedistributionofSiCparticlesandcellsearlbemoreequablebystrictlycontrollingtheprocessparameterssuchasfoamingtemperature,stirringtimeandspeed．8iCparticle-reinforoedaluminumfoamswereproducedbymeltfoamingprocess．a

6、ndtheirdeformingactivityunderquasi-statisticpressingwasanalysised．羽祷resultsindicatethatthedefornfingstrengthofreinforcedaluminumfoamsiSbetween5～12MPa,thereinforcingeffectsisobvious．Transverseandlongitudinaldeformingactivityandenergyabsorptionabilityofaluminumfoam蠡Uedtubesunderquasi．staffs

7、ticcompressionWerestudied．whichWaSfabricatedbystalnlCSSsteeltubeaSitsshellandSiCparticle—reinforcedaluminnlTlfoam拄si拯core，Theresultsindicatethatthelongitudinaldeformingmodeoftbefoam-filledtubechangesfrom‘'diamondmode”to“concertinamode'’：Theplateauregionoftheload—dis