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1、气雾化法制备Fe-6.5%Si-x%Ni合金粉末及其性能的研究王山山组强赵鈕姐赵文东刘英杰北京康普锡威科技有限公司采用气雾化法制得了Fe-6.5%Si-x%Ni(x=0,0.2,0.5,0.8,1.0;质量分数)金属软磁合金粉末,对合金粉末进行绝缘包覆处理后压制成磁粉芯进行磁性能检测,磁粉芯尺寸为27mmX15mmX5酮,压制压力为1GPa。利用激光粒度分析仪、扫描电子显微镜(SEM)、X射线衍射仪(XRD)和软磁交流分析仪对粉末的粒度分布、形貌、相组成和磁性能进行检测和分析。结果表明:在雾化过
2、程中,随着Ni元素添加量的增加,金属液粘度增加,雾化时间变长,粉末颗粒尺寸增大,中位径d50从21.04um增大到38.62um;粉末为球形或近球形,部分粉末表而有卫星球;粉末为单相ci-Fe相,表明Ni元素以固溶体形式溶入基体晶格,造成晶格畸变,增加了合金粉末的内应力;随着Ni元素含量的升高,矫顽力先升高后降低,添加1.0%Ni吋为最优值307.9A•m-1(0.05T,100kHz),振幅磁导率先降低后升高添加1.0%Ni时为最优值15.7(0.05T,100kHz),且在频率达到80kHz
3、时略有升高,磁损耗先升高后降低,在添加1.0%Ni时为最优值4595mW•cm-3(0.05T,100kHz)。关键词:气雾化;金属软磁;合金粉末;磁损耗;.•王山山(1989-),男,河北沧州人,研究生,研究方向:气雾化制粉及其粉末磁性能研宄;E-mail:wangshanl9901221@163.com;胡强,教授;电话:13911188696;E-mail:hqbpu@263.net2016-03-14基金:北京市科技新星计划项目(7141103001814079)资助Performanc
4、eCharacterizationofGas-AtomizedFe-6.5%Si-x%NiPowdersWangShanshanHuQiangZhaoXinmingShengYanweiZhaoWendongLiuYingjieBeijingCOMPOAdvancedTechnologyCo.,Ltd.;Abstract:Fe~6.5%Si~x%Ni(x=0,0.2,0.5,0.8,1.0;massfraction)softmagneticalloypowderswereproducedbyga
5、satomizationtechnologyandpressedintomagneticcoresformagneticpropertiesdetection.Thesizeofthecoreswas27mmX15mmX5mmandthepressingpressurewas1GPa.Laserparticlesizeanalyzer,scanningelectronmicroscopy(SEM),X-raydiffraction(XRD)andsoftmagneticACanalyzerwer
6、eusedtodetectandanalyzetheparticlesizediffraction,morphology,phasecompositionandmagneticproperties.Theresultsshowedthat,intheprocessofatomization,theatomizationtimeincreasedwiththeincreaseoftheamountofNiadditionduetotheimprovementofviscosityoftheallo
7、y.AndtheparticlesizeincreasedwiththeincreaseoftheamountofNiaddition,andthemediandiameterincreasedfrom21.04to38.62um.Thepowdersweresmoothandsphericalinshapewithafewsatelliteballscladdedtothesurface,a-Fediffractionpeakswerethesinglephasefoundinthepowde
8、rswhichindicatedthatNiatomsgotintothebaseironlatticeassolidsolution.Thecoerciveforcerosefirstandfelllaterandthebestvaluewas307.9A•m-1with1.0%Niadditionat0.05Tand100kIIz.Theamplitudepermeabilityfellfirstandroselaterandthebestvaluewas15-7,whichwasacqui