| Microstructures and Magnetic Properties of As-Cast RE（Dy）-Fe-C（B） Alloys |
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| 引用本文： | 张茂才,周寿增,王亦忠,Hadjipanayis G C.Microstructures and Magnetic Properties of As-Cast RE（Dy）-Fe-C（B） Alloys[J].中国稀土学报(英文版),2003,21(2):105-107. |
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| 作者姓名： | 张茂才 周寿增 王亦忠 Hadjipanayis G C |
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| 作者单位： | State Key Laboratory for Advanced Metals and Materials，Beijing University of Science and Technology，Beijing 100083，China，State Key Laboratory for Advanced Metals and Materials，Beijing University of Science and Technology，Beijing 100083，China，Sanhuan Company，Chines Academy of Sciences，Department of Physics and Astronomy，University of Delaware Beijing 100080，China，Newark 19716，USA |
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| 基金项目： | ProjectsupportedbyUSArmyResearchOffice |
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| 摘 要： | RE2 Fe14 Ccompoundswithtetragonalcrystalstructureareformedforalmostallrareearthelements(RE ) .Theirmagneticpropertiesareveryclosetothoseofthecorrespondingborides1～ 5] .Formostofthelightrare earthelements ,La ,Ce ,ProrNd ,itisdifficulttoproducetheRE2 Fe14 Cphase5～ 7] .Thereasonisthefairlylowtemperature (Tt)ofthesolidstatephasetransformationinthesecompounds .TheydecomposeeasilyintoRE2 Fe17Cxcompoundsathighertemperatures8,9] .Highcoercivitiescanbeobtainedthroughacontrolledtransformat…
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| 关 键 词： | RE-Fe-C 铸造合金 稀土 显微结构 磁性能 SEM TEM |
Microstructures and Magnetic Properties of As-Cast RE(Dy)-Fe-C(B) Alloys |
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| Hadjipanayis G C.Microstructures and Magnetic Properties of As-Cast RE(Dy)-Fe-C(B) Alloys[J].Journal of Rare Earths,2003,21(2):105-107. |
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| Authors: | Hadjipanayis G C |
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| Abstract: | High coercivity was obtained in bulk RE(Dy)-Fe-C(B) alloys with RE=Nd, Pr and Mm. In the as-cast state, the samples show a negligible coercivity Hci. Magnetic hardening takes place when annealing the as-cast alloys at around 1173 K for several hours, which produces an Hci greater than 1200 kA*m-1. Boron appears to be very important for achieving high coercivity, which is found to increase with increasing Dy content. SEM studies show a very small grain size at around 2 μm. X-ray diffraction and TEM studies reveal the existence of multiphases after annealing. They are RE2Fe14(B,C), RE2Fe3Cx, alpha-Fe(RE) and RE2Fe17(B,C) in order of their amounts. The carbide RE2Fe3Cx has a complicated hexagonal structure with a=0.468 nm and c=0.795 nm. |
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| Keywords: | metal meterials cast alloy microstructure coercivity rare earths |
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