SiCp/Al复合材料的Fe11+离子辐照实验研究郭义盼，张同林，常浩刚，苏洋帆，张余炼，魏志勇（南京航空航天大学航天学院，南京211106）摘要：为了解辐照对航天电子元器件封装基板复合材料SiCp/Al的影响，利用3MeVFe11+束流进行了不同注量下的辐照实验。辐照完成后，利用X射线衍射（XRD）仪和纳米压痕仪对材料进行表征分析。XRD分析表明，Fe11+离子入射后材料辐照层应力发生了变化。结合对应的理论模型，对铝基体的位错密度进行计算，发现辐照后铝基体的位错密度增加，SiC颗粒产生非晶化。纳米压痕测试表明，随着离子注量增加，材料辐照硬化程度增加。综上，辐照硬化可能是由于铝合金基体的应力变化导致产生局部高密度位错区，而这些区域阻碍了后续位错的运动，进而导致位错聚集，最终使得材料硬度增加。关键词：SiCp/Al复合材料；X射线衍射；纳米压痕；辐照硬化；位错密度；实验研究中图分类号：V416.5;O483文献标志码：A文章编号：1673-1379(2023)01-0055-07DOI:10.12126/see.2022079ExperimentalstudyonSiCp/AlcompositesunderirradiationofFe11+ionsGUOYipan,ZHANGTonglin,CHANGHaogang,SUYangfan,ZHANGYulian,WEIZhiyong(SchoolofAstronautics,NanjingUniversityofAeronauticsandAstronautics,Nanjing211106,China)Abstract:TounderstandtheeffectofirradiationonSiCp/Alcompositesforaerospaceelectroniccomponentspackingsubstrates,3MeVFe11+beamwasusedtocarryoutirradiationexperimentsunderdifferentionfluence.Afterirradiation,X-raydiffraction(XRD)andnano-indentationwereusedtocharacterizeandanalyzethematerials.XRDanalysisindicatedthatthestressofirradiatedlayerchangedafterFe11+ions’incidence.Combinedwiththecorrespondingtheoreticalmodel,thedislocationdensityofaluminummatrixwascalculated.Itwasfoundthatthedislocationdensityofaluminummatrixincreased,andtheSiCparticleswereamorphizedafterirradiation.Themeasurementofnano-indentationrevealedthattheirradiationhardeningofthematerialincreasedwiththeincreaseofionfluence.Itcanbededucedthattheirradiationhardeningmaybeduetothestresschangesinaluminumalloymatrixleadingtothegenerationoflocalhigh-densitydislocationregions,whichimpedesthesubsequentdislocationmovements,andultimatelyincreasesthehardnessofthematerial.Keywords:SiCp/Alcompo...
