Effects of cobalt substitution on structure and microwave absorption properties of PrNi_5 alloy

作     者：潘顺康 熊吉磊 成丽春 姚青荣 饶光辉 PAN Shunkang;XIONG Jilei;CHENG Lichun;YAO Qingrong;RAO Guanghui

作者机构：School of Material Science and EngineeringGuilin University of Electronic Technology Guangxi Key Laboratory of Information MaterialsGuilin University of Electronic Technology School of Materials Science and Engineering Central South University 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2015年第33卷第12期

页      面：1324-1328页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0708[理学-地球物理学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by National Natural Science Foundations of China(51361007) Guangxi Natural Science Foundations(2013GXNSFAA019295 2014GXNSFAA118317) Scientific Research of Guangxi Education Department(YB2014139) Guangxi Key Laboratory of Information Materials(1210908-07-K 131010-Z) 

主　　题：PrNi5 alloy Co substitution structure electromagnetic parameters microwave absorbing properties rare earths 

摘      要：The polycrystalline samples PrNi5_xCox （x=0.0, 0.1, 0.2, 0.3, 0.4） were synthesized by arc smelting and high energy ball milling method. The phase structure, morphology, saturation magnetization and electromagnetic parameters of the alloy powders were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, vibrating sample magnetomctry （VSM） and vector network analyzer （VNA）, respectively. The results revealed that the lattice parameter a and c and unit-cell volume V increased with the increasing amount of Co substitution. The saturation magnetization increased as Co content increased. The minimum absorp- tion peak frequency shifted towards lower frequency region with the increasing amount of Co substitution. And the minimum reflec- tion loss of the PrNi5 xCox powders increased first and then decreased with the increasing amount of Co substitution. The PrNisCox alloys possessed the excellent microwave absorbing properties. The minimum reflection loss of the ***0,1 alloy all could reach 20.0 all3 with the coating thickness ranging from 1.8 to 3 ram. The minimum reflection loss of ***.l powders was -36.20 d13 at 7.76 GHz, and the frequency bandwidth ofR〈10 dB reached about 1.50 GHz with the best matching condition d=2.0 ram.