低压脉冲磁场对原位铝基复合材料凝固组织的影响  

Effects of Low-voltage Pulsed Magnetic Field on Solidification Structure of in-situ Aluminum Matrix Composite

作　　者：张磊[1,2] 张晓楠[1] 钟紫林[1] 朱家煌[1] 邹海云[1] 

机构地区：[1]南昌航空大学,南昌330063 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《南昌航空大学学报（自然科学版）》2009年第3期19-23,共5页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：南昌航空大学"三小"科技创新基金项目"高性能原位颗粒增强铝基复合材料的研制"

摘　　要：文章通过调整脉冲电压和放电频率,研究了低压脉冲磁场对原位铝基复合材料凝固组织的影响。结果表明:在脉冲磁场的作用下,复合材料凝固组织由等轴枝晶转变成细小的等轴晶。脉冲电压在0-250V,放电频率在0-6Hz范围内,随着脉冲电压和放电频率的增加,等轴晶不断细化。Effects of low-voltage pulsed magnetic field on solidification structure of aluminum matrix composites were investigated by the adjustment of pulse voltage and discharge frequency.The results show that low-voltage pulsed magnetic field can convert equiaxed dendrite into equiaxed crystal in solidification of aluminum matrix composites ranging in 0-250 V of pulse voltage and 0-6Hz of discharge frequency.With the increase of pulse voltage and discharge frequency,equiaxed crystal is remarkably refined.

关 键 词：低压脉冲磁场 原位铝基复合材料 凝固组织 晶粒细化 

分 类 号：TG146.21[一般工业技术—材料科学与工程]