摘要
采用熔炼、高能球磨、微氧化热处理工艺,制备RE(Nd,Tb)FeCoB粉体,借助X射线衍射仪和网络矢量分析仪等,研究不同B含量的NdFeCo粉体组织结构和微波吸收特性,以及用重稀土Tb取代NdFeCoB合金中的Nd后粉体的组织结构和微波吸收特性。结果发现:在Nd10.53Fe77.84Co11.63合金中加入B元素后会析出Nd2Fe14B相,而且,粉体中α-Fe相的相对含量随着B元素含量的增加而增加;用重稀土Tb取代NdFeCoB合金中的Nd后粉体主要由α-Fe、Tb2Fe14B、Tb2Fe17以及少量的Tb2O3相组成;(Nd10.53Fe77.84Co11.63)97B3粉体具有最低的吸收峰频率,其反射率最小值和吸收峰频率分别为–9.5 dB和4.5 GHz;用重稀土Tb取代(Nd10.53Fe77.84Co11.63)97B3合金中的Nd后,粉体的吸收峰频率升高到6.3 GHz,但反射率最小值降低到–11 dB。
The RE（Nd, Tb）FeCoB magnetic powders were prepared by arc melting, high energy ball milling and a partial oxidation treatment method. A X-ray diffraction device and a vector network analyzer were used to analyze the phase structure and microwave absorbing properties of the powders. The results of B addition to the microwave absorbing performances in the NdFeCo alloy, indicate that NdEFel4B phase will precipitate and the relative content of the α-Fe phase increases with the increasing of B in Nd10.53Fe77.84Co11.63 alloy powder. When Nd is replaced by the heavy rare earth Tb in NdFeCoB alloy, the powders consist of α-Fe, Tb2Fe14B, Tb2Fe17 and a small amount of Tb203 phases. （Nd10.53Fe77.84CO11.63）97B3 powder has a minimum of absorption peak frequency, which is -9.5 dB at 4.5 GHz. After substituting Tb for Nb in （Ndx0.53Fe77.84CO11.63）97B3 alloy the absorption peak frequency increases to 6.3 GHz, but the reflectivity value is reduced to -1 1 dB.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第4期803-807,共5页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(50961005)
National Natural Science Foundation of Guangxi(2012GXNSFGA06002)
关键词
NdFeCoB
微波吸收特性
组织结构
高能球磨
NdFeCoB alloy
microwave absorption properties
microstructure
high energy ball milling
