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金属学报  2004, Vol. 40 Issue (4): 378-382     
  论文 本期目录 | 过刊浏览 |
定向凝固Tb--Dy--Fe合金的热处理组织与性能
蒋成保 赵 岩 徐惠彬
北京航空航天大学材料学院; 北京 100083
MICROSTRUCTURE AND PROPERTIES OF THE HEAT TREATED DS Tb--Dy--Fe ALLOY
JIANG Chengbao; ZHAO Yan; XU Huibin
School of Materials Science and Engineering; Beijing University of Aeronautics and Astronautics; Beijing 100083
引用本文:

蒋成保; 赵岩; 徐惠彬 . 定向凝固Tb--Dy--Fe合金的热处理组织与性能[J]. 金属学报, 2004, 40(4): 378-382 .
, , . MICROSTRUCTURE AND PROPERTIES OF THE HEAT TREATED DS Tb--Dy--Fe ALLOY[J]. Acta Metall Sin, 2004, 40(4): 378-382 .

全文: PDF(339 KB)  
摘要: 采用区熔定向凝固的方法, 制备<110>取向 Tb--Dy--Fe超磁致伸缩合金晶体. 用管式炉氩气保护, 在 900---1100 C进行4和48 h的均匀化热处理, 研究了热处理对Tb--Dy--Fe合金取向、组织、磁致伸缩性 能和力学性能的影响. 结果表明, 热处理不改变 Tb--Dy--Fe合金的轴向择优取向; 热处理4 h后, 网状富稀土相明显退化, 向颗粒状转变; 热处理48 h后, 网状富稀土相基本消失, 形成大量颗粒状富稀土相. 热处理明显提高了Tb--Dy--Fe合金样品的磁致伸缩性能, 特别是提高低场磁致伸缩性能, 但力学性能下降. 经4 h热处理, 本实验条件下制备的 <110>取向Tb--Dy--Fe合金样品综合性能最好.
关键词 Tb--Dy--Fe合金超磁致伸缩    
Abstract:<110> oriented rods of a Tb--Dy--Fe magnetostrictive alloy have been successfully prepared by zone melting unidirectional solidification. A homogenization annealing for 4 or 48 h at 900---1100 C has been carried out in a quartz cylinder under Ar protection after pumping to 2X10 -3 Pa. It was found that, after annealing, <110> preferred orientation is unchanged, the net shape pseudo--eutectic rare earth phase trends discontinuous and spheroidal, magnetostriction slightly decreased without pre--stress but increased obviously with pre--stress. An obvious magnetostriction jump effect was observed in the annealed samples. A satisfactory magnetostrictive property of 1950X10 -6 was obtained under 15 MPa pre--stress after 4 h heat treatment. The compressive stresses of the heat--treated samples decrease monotonously with increasing the soaking time. A satisfactory combination of the magnetostriction and mechanical properties was obtained at annealing for 4 h for the <110> oriented Tb--Dy--Fe alloy.
Key wordsTb--Dy--Fe alloy    magnetostriction   
收稿日期: 2003-04-16     
ZTFLH:  TG113  
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[1] 张昌盛 马天宇 严密 裴永茂 高旭 . <110>取向Tb0.36Dy0.64(Fe0.85Co0.15)2合金的磁机械阻尼特性[J]. 金属学报, 2009, 45(6): 749-753.
[2] 蒋成保; 赵岩; 徐惠彬 . <111>和<112>取向Tb--Dy--Fe超磁致伸缩合金的定向生长[J]. 金属学报, 2004, 40(4): 373-377 .