·76· 北京科技大学学报 1998年第1期 参考文献 I Fujikura Limited.Magnetic Wire.GB,UK Patent Application,2126 409 A.1984-05-21 2住友電氣工装株式會杜.雅着冰雪用部品.JP,公開特許公報(A),昭59一144314.19848-18 3住友重氟工業株式會社.難着雪電線.JP,公開特許公報(A),平1一95407.1989-0413 4住友電氣工業株式會杜.雅着雪電線.JP,公阴特許公報(A),平2一7304.1990-01-11 5魏宝明主编.金属腐蚀理论及应用.北京：化学工业出版社，1984.130 Calculation and Analysis of Magneto-calorific Power for Composite Wire of Magnetic Core with Conductive Layer Gao Xiaomei Zhou Shouzeng Zhang Maocai Wang Run Material Science and Engineering School,UST Beijing,Beijing 10083,China ABSTRACT The representations of magneto-calorific power P for composite wire of magnetic core with conductive layer in various shapes (columnar,tubular and sheet)are derived.The results showed that the eddy calorific power can be divided into two parts. One is relative to magnetism,electricity and the size of sample,another is relative to the adapted structure of magnetic core and conductive layer (structure factor),and to sample shape (shape factor n).The analysis indicates that the thinner the covered conductive layer is,the greater the calorific power generated by the conductor gets. KEY WORDS composite wire of magnetic core with conductive layer;magneto-calorific effect;structure factor;shape factor 舟舟舟舟守舟舟舟舟舟舟舟舟舟舟舟☆舟舟舟舟舟舟舟舟舟舟舟舟舟舟舟舟舟中中舟舟舟舟舟☆舟 (上接71页) Microstructure and Magnetic Properties of Nanocomposite Pr,Fe,B/a-Fe Hard Magnetic Alloys by Dy and Nb Substitutions Wang Zuocheng Zhou Shouzeng Qiao Yi Zhang Maocai Gao Xuexu Zhao Qing Wang Run State Key Laboratory for Advanced Metals and Materials.Materials Sciences and Engineering School,Beijing 100083.China ABSTRACT The effects of Dy and Nb substitution on the formation,microstructrure and magnetic properties of Pr,FeB/a-Fe nanocomposites have been investigated.It was found that for Pr,FesB ribbons,the metastable Pr,FeB,phase occurs after the initial crys. tallization of a-Fe and prior to the formation of the finial mixture of Pr,FeB and a -Fe.However,no metastable phase was observed during the crystallization of Dy or both Dy and Nb substituted ribbons.The addition of both Dy and Nb can cause the significant improvement of the magnetic properties. KEY WORDS Dy and Nb substitutions;nanocomposite magnets;remanence enhancement7 6 北 京 科 技 大 学 学 报 19 9 8年 第 l期 参 考 文 献 uFj i k aur iL m i et d . M ag en it e Wi er . G B , U K aP et n t A PPl i c a it o n , 2 1 2 6 4 0 9 A . 19 8 4 一 0 5 一 2 1 住 友 奄氧 工 案 株 式 食社 . 雌着 冰 雪 用 部 品 . JP , 公 阴 特 爵 公 报 (A ) , 昭 59 一 14 4 3 1 4 . 1 9 8 4 一 8 一 18 住 友 奄 氟工 集 株 式 曹 社 . 雌 着 雪 霓 腺 . PJ , 公 阴 特 爵 公 报 (A ) , 平 1一9 5 4 0 7 . 1 9 8 9 一 0 4 一 13 住 友 霓 氧工 桨 株 式 含社 . 摊 着 雪 霓 腺 . -PJ , 公 阴 特 爵 公报 (A ) , 平 2一 7 3 04 . 19 9 0 一 0 1 一 1 魏宝 明主编 . 金属腐蚀理论及应 用 . 北京 : 化学工业 出版社 , 1 984 . 1 30 C a l c u l a ti o n a n d A n a ly s i s o f M a g n e t o 一 c a l o r iif c P o w e r of r C o m P o s it e W i r e o f M a g n e t i e C o r e w it h C o n d u e t i v e L ay e r G a o 石a o m e i 乃 o u 肠 o u ze n g 及 a n g 几匆 o e a i Wa n g 彻 n M a t e n al S c i e cn e an d E n g i n e e ir n g S e h o l , U S T B e ij i n g , B e ij i n g 10 0 8 3 , C h i n a A B S T R A C T hT e re Pre s e n ta it o n s o f m a g n e -to e a l o ir if e po w e r P fo r e om po s ite w ire o f m ag ne it e e o re w i ht c o n d uc it v e l ay e r i n v a ir o u s s h a pe s ( e o l tn n a r , ut b u l a r an d s he e )t aer d e ir v e d . T h e er s ul st s h o w e d ht a t ht e e d d y c al o ir if e po w e r e a n be d i v i d e d i n ot wt o P a 川` . O l l e 1 5 er l iat v e ot m ag ne it sm , e l e e itr e i yt an d ht e s i z e o f s am Pl e , an o het r 1 5 er l iat v e ot ht e ad ap et d s tr u c t u er o f m ag n e it e e o er an d e o n d cu it v e l a y e r ( s utr c ut er acf ot r平 ) , a n d ot s am P l e s h a pe ( s h a pe afC ot r 珍) . hT e an al y s i s i n d i e a et s ht a t ht e 而 n n e r ht e c o v e er d e o n d u e it v e l ay e r 1 5 , ht e g er aet r ht e e al o ir if e P o w e r g e n e ar et d 勿 ht e e o n d cu ot r g e st . K E Y W O R D S e o m P o s i et w i er o f m a g n e it c c o er w iht e o n d cu it v e l a y e r ; m a g n e ot 一 c a l o ir if c e fe e 仁s t r u c ut er afC ot r ; s h a pe acf ot r 有 安安 衡有 有有 有 有有 衡有有 有有有 有有 有有有 有有有 有有 有有 有有有 有有 有有有 有有 有有有 有有 (上接 7 1 页 ) M i e r o s t ur e ut r e p r Z F e l 4B / a 一 F e 环a n g a n d M a g n e t i e P r o P e rt i e s o f N a n o e o m P o s it e H ar d M a g n e t i e A ll o y s b y D y a n d N b S u b s ti ut ti o n s 及 o e h e n g 及 o u G a o J 豹理e 刀碑 肠 o u 韶n g Qia o K 助 a n g 人匆 o e a i 乃 a o Qin g 肠 n g 撇 n S t a t e 众y 肠bo m t o yr fo r A d v acn e d M e 囚 5 an d M a et ir al s , Mate ir al s S e i e cn e s an d E n g i n e e ir n g S c h o o l , B e ij i n g 100 0 8 3 , C hi n a A B S T R A C T hT e e fe e ts o f 切 a n d 卜七 s u b s it tu it o n o n ht e fo rm a it o n , 而 e r o s tur c utr er an d m昭 n e it c p or 详 in e s o f p rZ eF l 4 B / a 一 eF n a n co o m oP s i et s h a v e be e n i n v e s it g a et d . It w as fo un d ht at fo r p gr eF s s B 6 ir b b o n s , ht e m e ast abt l e p 乓eF 2 3 B 3 p h as e co c u sr a fet r ht e iin it al c 卿 s · alt li z a it o n o f 。 一 eF a n d p ir o r ot ht e fo mr a it o n o f ht e if n i a l m i x ut er o f rzP eF l 4 B a n d a 一 eF . H o w e v e r , n o m e ast at b l e P h as e w as o be e vr e d d u ir n g ht e c yr s alt li z a it o n o f 切 o r bo ht 切 an d N b s u b s it ut et d ir b b o n s . hT e ad d iit o n o f b o ht 切 a n d N b e an e au s e ht e 5 19 面if e an t im Por v e m e n t o f ht e m ag n e it e P or pe irt e s . K E Y W O R D S 切 an d N b s u b s it t u it o n s ; n a n co o m P o s i et m a g n e st ; er m a n e n e e e hn a n e e m e n t