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Microwave Properties of RE(Nd, Tb)FeCoB Alloy System
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Microwave Properties of RE(Nd, Tb)FeCoB Alloy System
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National Natural Science Foundation of China (50961005); National Natural Science Foundation of Guangxi (2012GXNSFGA06002)

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    摘要:

    采用熔煉、高能球磨、微氧化熱處理工藝，制備RE(Nd, Tb)FeCoB粉體，借助X射線衍射儀和網(wǎng)絡(luò)矢量分析儀等，研究不同B含量的NdFeCo粉體組織結(jié)構(gòu)和微波吸收特性，以及用重稀土Tb取代NdFeCoB合金中的Nd后粉體的組織結(jié)構(gòu)和微波吸收特性。結(jié)果發(fā)現(xiàn)：在Nd10.53Fe77.84Co11.63合金中加入B元素后會(huì)析出Nd2Fe14B相，而且，粉體中α-Fe相的相對(duì)含量隨著B元素含量的增加而增加；用重稀土Tb取代NdFeCoB合金中的Nd后粉體主要由α-Fe、Tb2Fe14B、Tb2Fe17以及少量的Tb2O3相組成；(Nd10.53Fe77.84Co11.63)97B3粉體具有最低的吸收峰頻率，其反射率最小值和吸收峰頻率分別為–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，粉體的吸收峰頻率升高到6.3 GHz，但反射率最小值降低到–11 dB。

    Abstract:

    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 Nd2Fe14B 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 Tb2O3 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 (Nd10.53Fe77.84Co11.63)97B3 alloy the absorption peak frequency increases to 6.3 GHz, but the reflectivity value is reduced to –11 dB.

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潘順康,林培豪,王 磊,劉 星,胡士齊,周懷營. Microwave Properties of RE(Nd, Tb)FeCoB Alloy System[J].稀有金屬材料與工程,2014,43(4):803~807.[Pan Shunkang, Lin Peihao, Wang Lei, Liu Xing, Hu Shiqi, Zhou Huaiying. Microwave Properties of RE(Nd, Tb)FeCoB Alloy System[J]. Rare Metal Materials and Engineering,2014,43(4):803~807.]
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  • 收稿日期:2013-04-21
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  • 在線發(fā)布日期: 2014-07-30
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