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.
<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.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%