Nd-Fe-C合金的结构及其微波吸收特性（英文）  

Structure and Microwave Absorption Properties of Nd-Fe-C Alloys

作　　者：乔自强 潘顺康[1,2] 熊吉磊 林培豪 成丽春[1,2,3] 王振中[1] Qiao Ziqiang;Pan Shunkang;Xiong Jilei;Lin Peihao;Cheng Lichun;Wang Zhenzhong(Guilin University of Electronic Technology, Guilin 541004, China;Guangxi Key Laboratory of Information Materials, Gufin 541004, China;Central South University, Changsha 410083, China)

机构地区：[1]桂林电子科技大学,广西桂林541004 [2]广西信息材料重点实验室,广西桂林541004 [3]中南大学,湖南长沙410083

出　　处：《稀有金属材料与工程》2018年第6期1734-1738,共5页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51361007);Guangxi Natural Science Foundation(2014GXNSFAA118317);Scientific Research Project of Guangxi Education Department(YB2014139);Innovation Project of GUET Graduate Education(YJCXS 201566);Guangxi Key Laboratory of Information Materials(131010-Z)

摘　　要：采用电弧熔炼及球磨工艺制备出Nd_(10.2) Fe_(89.8-x)C_x(x=0,2.6,5.2,7.8)合金微粉,借助XRD、SEM和网络矢量分析仪等仪器分别对合金微粉的结构、形貌及其室温下微波吸收性能进行了研究。研究发现,随着C含量的增加,Nd_(10.2) Fe_(89.8-x)C_x合金的最小反射峰频率向高频方向移动,其中Nd_(10.2)Fe_(84.6)C_(5.2)合金具有最好的吸波效果。在最佳匹配厚度1.8 mm下,Nd_(10.2)Fe_(84.6)C_(5.2)合金的最小反射损耗在5.2 GHz处达到–13.2 dB左右,反射损耗小于–10 dB的频带宽度达到了1.3 GHz。随着匹配厚度的增加,最小反射损耗向低频移动,最小反射损耗与干涉损耗有关。Nd10.2 Fe89.8-xCx（x=0, 2.6, 5.2, 7.8） powders were prepared by arc smelting and ball milling. The structure and morphology of the powders were investigated by X-ray diffraction（XRD） and scanning electron microscopy（SEM）. The electromagnetic parameters of the powders were measured by vector network analyzer（VNA） at room temperature. It is found that the microwave absorbing properties of Nd10.2 Fe89.8-xCx（x = 0, 2.6, 5.2, 7.8） depend sensitively on the compositions. The minimum absorption peak frequency shifts to the higher region upon the C content. The minimum reflectivity value of Nd10.2Fe84.6C5.2 can reach –13.2 dB at 5.2 GHz and the bandwidth of R –10 dB reaches 1.3 GHz with the best matching thickness of 1.8 mm. The minimum absorption peak shifts towards lower frequency region with increasing absorbing coating thickness. The minimum absorption peak is related to interference loss.

关 键 词：NdFeC合金 球磨 电磁参数 微波吸收特性 

分 类 号：TG146.416[一般工业技术—材料科学与工程]