摘要
研究了磁场热处理对<110>取向Tb0.3Dy0.7Fe1.95多晶合金磁致伸缩“跳跃”效应的影响。在真空超导体强磁场装置中,将经定向凝固的<110>取向Tb0.3Dy0.7Fe1.95多晶合金棒,沿垂直轴向施加强度为1T的磁场,加热到623和723K下,保温5min后随炉冷却。研究结果表明,磁场热处理增强预压力下的“跳跃”效应,提高不同预压力下的饱和磁致伸缩系数λs,其中623K磁场热处理样品在8.1MPa下的λs达到1950×10-6。磁场热处理提高预压力(8.1MPa)下的动态磁致伸缩系数最大值d3m3ax,但同时增大d3m3ax对应的磁场。
The 〈 110 〉 -oriented Tb0.3Dy0.7Fe1.95 polycrystalline alloy was magnetically annealed, and its influence on jump effect of magnetostriction was investigated. In the vacuum superconductive high magnetic field equipment, 〈 110 〉 -oriented Tb0.3Dy0.7Fe1.95 polycrystalline alloy after directional solidification was annealed at 623 and 723 K for 5 min under the magnetic field vertical to specimen axis. It is found that magnetic annealing can enhance the jump effect under compressive stress, and increase the saturated magnetostriction coefficient λ, the λ,of the magnetic annealing specimens at 623 K under 8.1 MPa is attained to 1950×10^-6. Magnetic annealing increases the maximum of dynamic magnetostriction coefficient, dmax33, as well as the magnetic field for dmax33 under 8.1 MPa.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2006年第2期197-200,共4页
Journal of the Chinese Society of Rare Earths
基金
国家杰出青年科学基金(50325102)
国家高技术研究发展计划(2002AA336010)资助项目
