Hf-Co-B-W合金薄带的结构和磁性  

Structure and Magnetic Properties of Hf-Co-B-W Alloy Ribbons

作　　者：吴春姬[1] 王文全[1] 张金宝[1] 侯志鹏[1] WU Chunji;WANG Wenquan;ZHANG Jinbao;HOU Zhipeng(College of Physics,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学物理学院,长春130012

出　　处：《吉林大学学报（理学版）》2018年第4期991-994,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:11074092;51073160;J1103202)

摘　　要：通过在Hf_(15)Co_(78)B_7合金中添加微量W的方法,制备Hf_(15-x)Co_(78)B_7W_x(x=0,1,2,3)快淬合金薄带,并利用磁性测量、X射线衍射、热磁分析与扫描电子显微镜考察其磁性能、相组成和微结构.结果表明:Hf_(15)Co_(78)B_7合金中添加适量的W可明显提高其矫顽力(HC);Hf_(13)Co_(78)B_7W_2薄带由Co_7Hf相及少量fcc-Co相组成,W原子进入Co_7Hf相的晶格中,使Co_7Hf相的Curie温度(TC)降低,磁晶各向异性场(Ha)增加;合金的晶粒尺寸明显减小.The Hf15Co78B7 Wx（x=0,1,2,3）alloy melt-spun ribbons were prepared through the method of adding trace of W in Hf15Co78B7 alloy.The magnetic properties,phase composition and microstructure were investigated by magnetic measurements,X-ray diffraction（XRD）,thermomagnetic analysis（TMA）and scanning electron microscope（SEM）.The results show that proper addition of W can improve the coercivity（HC）of Hf15Co78B7 alloy significantly,Hf13Co78B7W2 melt-spun ribbons are composed of Co7 Hf phase and a small amount of fcc-Co phase,W atoms enter the lattice of Co7 Hf phase,resulting in the decrease of the Curie temperature（TC）of Co7 Hf phase and increase of the magnetocrystalline anisotropy field（Ha）.The grain size of alloy decreases significantly.

关 键 词：Hf15-xCo78B7Wx合金薄带 Co7Hf相 矫顽力 

分 类 号：O441.2[理学—电磁学]