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国家重点基础研究发展计划(2012CB619404)

作品数:9 被引量:38H指数:4
相关作者:蒋成保王敬民刘敬华张天丽贺杨堃更多>>
相关机构:北京航空航天大学更多>>
发文基金:国家重点基础研究发展计划国家自然科学基金北京市自然科学基金更多>>
相关领域:一般工业技术金属学及工艺理学电气工程更多>>

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Progress in bulk MgCu_2-type rare-earth iron magnetostrictive compounds被引量:2
2013年
Studies of bulk MgCu2-type rare-earth iron compounds with Laves phase are reviewed. The relationship between magnetostriction and structural distortion and the consequent crystallographic method for measuring magnetostriction are introduced at first. Then we review recent progress in understanding bulk magnetostrictive Laves phase materials, especially the magnetostriction and the minimization of the anisotropy of the light rare-earth Pr- and Sm-based compounds. Finally, a summary and outlook for this kind of compounds are presented.
任卫军张志东
关键词:MAGNETOSTRICTIONANISOTROPY
A linear elastic Ni_(50)Mn_(25)Ga_9Cu_(16) martensitic alloy
2013年
The linear elasticity was studied in a martens- tic alloy NisoMn25Ga9Cu16. A 0.4 % linear elastic strain is btained in the polycrystalline sample under compressive stress of 745 MPa. The elastic modulus is 186 GPa. The obtained linear elastic strain and elastic modulus are much higher than that of ternary Ni-Mn-Ga martensitic alloys.~.bstract The linear elasticity was studied in a martens- tic alloy NisoMn25Ga9Cu16. A 0.4 % linear elastic strain is ~btained in the polycrystalline sample under compressive stress of 745 MPa. The elastic modulus is 186 GPa. The obtained linear elastic strain and elastic modulus are much higher than that of ternary Ni-Mn-Ga martensitic alloys.
Cong-Wei WangJing-Min WangCheng-Bao Jiang
关键词:NI-MN-GAMARTENSITE
Improved magnetostriction of Fe83Ga17 ribbons doped with Sm被引量:8
2017年
In order to demonstrate that light rare-earth(RE)dopants with strong magnetocrystalline anisotropy, whose net moment couples are antiparallel to those of iron, can also induce giant magnetostriction in Gafenol, a light RE element Sm was selected as the third element to dope into FeGaalloy.(FeGa)Sm(0≤x≤0.42) ribbons were prepared by melt spinning. The increase of the lattice parameters and saturation magnetization indicates that some Sm atoms enter the A2 matrix substitutionally. Doping the FeGaribbons with the light RE Sm element drastically improves the magnetostriction. Perpendicular magnetostriction value of λ=-5*10is achieved in(FeGa)Sm. It is confirmed that the stronger local magnetocrystalline anisotropy induces larger enhanced magnetostrictions. The greatly enhanced magnetostriction is somehow related to the local microstrains induced by the RE dopants. It is likely that the RE-induced defects in the(FeGa)REribbons function in the similar way as the Ga–Ga pair defects in the undoped Fe–Ga alloys.
Wei WuChengbao Jiang
关键词:RIBBONSSMMAGNETOSTRICTION
Microstructure and magnetostrictive properties of Tb doped Fe–Ga bulk alloys prepared by melt quenching被引量:5
2014年
The microstructure and magnetostrictive properties were investigated in the Tb doped Fe83Ga17-xTbx(x = 0.05, 0.10, 0.20, 0.30, 0.40, 0.50) bulk rods prepared by melt rapidly quenching. The partial solid solubility of Tb in the Fe-Ga matrix was preliminary detected by the lattice parameters and SEM observation. The matrix keeps A2 structure and the second phase appears surround the grain boundary as x C 0.1. h100 i preferred orientation is also observed for x = 0.1 sample along the axis of the quenched rod. The saturation magnetostriction first increases and maximum value reaches at x = 0.1, and then decreases with Tb addition increasing. The initial increase of the magnetostriction should be associated with the partial solution of Tb in the matrix, the maximum value at x = 0.1 should be attributed to the h100 i preferred orientation, and the decrease of the magnetostriction is correlated with the appearance of the second phase along the grain boundary.
Shu-Xin ZhangWei WuXiao-Xi ZhuJing-Hua LiuCheng-Bao Jiang
关键词:MAGNETOSTRICTIONMICROSTRUCTURE
热磁耦合马氏体相变及其物理效应被引量:3
2017年
马氏体相变和磁性转变是两类典型的固态相变,其中,马氏体相变在钢铁等结构材料和形状记忆合金等功能材料中普遍存在,磁性转变在磁性材料中普遍存在。此前,这两类相变一直各自独立发生。在新型磁性形状记忆合金中发现了二者共同发生的热磁耦合马氏体相变现象,此后基于该现象的磁场诱发相变及其引发的磁致应变、磁热、磁电阻等丰富的物理效应成为本领域的研究热点。本文综述了热磁耦合马氏体相变、磁场诱发相变及其物理效应等方面的研究进展,并对未来发展趋势做了展望。
蒋成保花慧王敬民
关键词:磁性形状记忆合金物理效应
Phase transition of Ni_(55-x)Co_(x)Mn_(20)Ga_(25)(8.5≤x≤11.0)alloys with different compositions and magnetic fields
2023年
Studies on Co-doped Ni–Mn–Ga ferromagnetic shape memory alloys(FSMAs)have been quite active topics in recent years.Unlike previous reports where the amount of Co doping was generally less than 8 at%,in this work Ni_(55-x)Co_(x)Mn_(20)Ga_(25)(8.5≤x≤11.0)alloys were studied with high Co doping.Unusual effects of both composition and magnetic field on phase transitions were observed.With the increase in substitution of Co for Ni,the magnetic transition temperatures increase gradually but the martensitic transformation temperature decreases quite sharply.In particular,the average decrease in the martensitic transformation temperatures is up to 100 K which is nearly twice that in the case of Co content of less than 8 at%.Further,under an applied magnetic field ranging from 0.03 to 0.60 T,abnormal stabilization of a martensite phase with lower magnetization was monitored.Magnetic entropy change of 1.6 J·kg^(−1)·K^(−1)was induced at the martensitic transformation of Ni46.5Co8.5Mn20Ga25 alloy by an applied field of 1 T.The magnetic contributions,including the magnetocrystalline anisotropy and the Zeeman energy,to the thermodynamics of the martensitic transformation are considered to understand the observed unusual phenomena.This work results in new insights into the understanding of Co-doped Ni–Mn-based ferromagnetic shape memory alloys.
Xiao WangJing-Min WangHui HuaCheng-Bao Jiang
关键词:NI-MN-GA
铁镓磁致伸缩合金研究现状与发展趋势被引量:7
2016年
铁镓合金是继Fe、Ni基磁致伸缩合金和TbDyFe稀土巨磁致伸缩合金之后出现的一种新型磁致伸缩材料,兼具成本低、应变大、驱动磁场低、力学性能好等综合优点,是近期国际研究热点之一。重点综述了铁镓磁致伸缩合金在相结构、磁致伸缩效应和微合金化方面的最新研究进展,并展望了其未来发展趋势。
蒋成保贺杨堃
关键词:磁致伸缩微合金化掺杂
Phase transition and mechanical properties of Ni_(30)Cu_(20)Mn_(37+x)Ga_(13-x)(x=0–4.5) alloys被引量:1
2014年
Ni30Cu20Mn37+xGa13-x(x = 0–4.5) alloys were studied with the phase transformation and mechanical properties. With the increase of Mn content, the martensitic transformation temperatures increase and the Curie temperature decreases. Simultaneously, the room temperature microstructure evolves from single phase of austenite to dual phases containing martensite and precipitation. Both the ductility and the strength of the polycrystalline alloys are significantly improved by the precipitation. Coupled magnetostructural transition from weak magnetic martensite to ferromagnetic austenite is obtained in both single-phase and ductile dual-phase alloys.
Huan-Fang WangJing-Min WangCheng-Bao JiangHui-Bin Xu
巨磁致伸缩材料及应用研究进展被引量:14
2012年
巨磁致伸缩材料是20世纪70年代发展起来的新型功能材料,具有应变大,能量转换效率高等优点,在功能转换、智能驱动、智能传感等高技术领域有重要应用。简要介绍了磁致伸缩及巨磁致伸缩材料的发展历史,从稀土巨磁致伸缩材料、非稀土巨磁致伸缩材料的合金化研究、制备技术和应用技术等方面综述了我国巨磁致伸缩材料的发展历程,介绍了我国的科研工作者在巨磁致伸缩材料研究领域所取得的重要研究成果,最后对巨磁致伸缩材料发展及应用进行了展望。
刘敬华张天丽王敬民蒋成保
关键词:巨磁致伸缩材料磁致伸缩合金化
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