定向凝固制备Mg_(98.5)Zn_(0.5)Y_1合金中LPSO相的结构及其对合金电磁屏蔽性能的影响  

Microstructure of the LPSO Phase in Mg_(98.5)Zn_(0.5)Y_1 Alloy Prepared by Directional Solidification and Its Effect on Electromagnetic Shielding Performance

作　　者：徐志超[1] 冯中学[1] 史庆南[1] 杨应湘[2] 王效琪[2] 起华荣[2] XU Zhichao;FENG Zhongxue;SHI Qingnan;YANG Yingxiang;WANG Xiaoqi;QI Huarong(School of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093;Key Laboratory of Advances Materials of Yunnan Province,Kunming 650093)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093 [2]云南省新材料制备与加工重点实验室,昆明650093

出　　处：《材料导报》2018年第6期865-869,共5页Materials Reports

基　　金：云南省科技厅青年基金项目(2016FD033);省级人培项目(KKSY201351055);教育部博士点基金(20135314110003);校重点基金(KKZ1201451001)

摘　　要：研究了定向凝固制备Mg_(98.5)Zn_(0.5)Y_1合金中LPSO相的微观结构以及对电磁屏蔽性能的影响。实验结果表明Mg_(98.5)Zn_(0.5)Y_1合金中生成了有序排列的片层状14H-LPSO相。通过对比普通铸造与定向凝固Mg_(98.5)Zn_(0.5)Y_1合金的电磁屏蔽性能,发现有序排列的LPSO相可以提高合金的电磁屏蔽性能。阐述了多层均匀平面体屏蔽体的理论模型,探讨了长周期有序相的位向与镁合金电磁屏蔽性能的关系。通过在合金中加入Zr元素,研究了LPSO相的宽度对电磁屏蔽性能的影响。结果表明,在高频下细小的LPSO相能够提升材料的电磁屏蔽性能。The microstructure of the LPSO phase in Mg 98.5 Zn 0.5 Y 1 alloy prepared by directional solidification and its effect on electromagnetic shielding performance were investigated.The formation of 14H-type LPSO was observed.For the directional solidification polycrystals,the LPSO exhibited a lamellar shape.By comparing the electromagnetic shielding properties of ordinary cast and directional solidified Mg 98.5 Zn 0.5 Y 1 alloy,it was found that the ordered LPSO phase could increase the electromagnetic shielding performance.The theoretical model of multi-layer uniform planar and the relationship between electromagnetic shielding performance and orientation of LPSO in magnesium were discussed.By adding the element Zr,the effect of the LPSO width on the electromagne-tic shielding performance was investigated.The result showed that the electromagnetic shielding performance was improved in high frequency due to the addition of Zr.

关 键 词：Mg98.5Zn0.5Y1合金 14H-LPSO 晶体结构 ZR 电磁屏蔽 

分 类 号：TG146.22[一般工业技术—材料科学与工程]