90-xPt10Bx (x=15~40,原子分?jǐn)?shù),%)系液態(tài)急冷合金熱處理前后的組織結(jié)構(gòu)和磁性能。結(jié)果表明,x由15增加至25~30可提高合金的非晶形成能力,急冷合金由非晶+fcc-FePt復(fù)相組織轉(zhuǎn)變?yōu)閱我环蔷B(tài)結(jié)構(gòu)；當(dāng)x進(jìn)一步增加至35和40時(shí),合金分別由fcc-FePt+Fe2B+FeB和L10-FePt+FeB納米復(fù)相組織構(gòu)成。經(jīng)適當(dāng)熱處理后,x=15~20的合金具有fcc-FePt+Fe2B復(fù)相組織而呈軟磁性；x=25~40的合金形成了由有序面心四方結(jié)構(gòu)的永磁L10-FePt相和軟磁Fe2B/FeB組成的納米復(fù)相組織,顯示出永磁特性,其中x=30的合金經(jīng)823 K熱處理900 s后具有最佳的永磁性能,矯頑力、剩磁和最大磁能積分別為173.2 kA/m,1.20 T和88.3 kJ/m3,其優(yōu)異的永磁性能源于分布均勻、平均晶粒尺寸約為15 nm的永磁L10-FePt相和軟磁Fe2B相間的交換耦合作用。"/>

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B含量對(duì)Fe90-xPt10Bx液態(tài)急冷合金組織結(jié)構(gòu)和磁性能的影響
作者:
作者單位:

1.大連理工大學(xué)材料科學(xué)與工程學(xué)院三束材料改性教育部重點(diǎn)實(shí)驗(yàn)室;2.Institute for Materials Research,Tohoku University,Sendai -,Japan

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中圖分類號(hào):

TG132.2

基金項(xiàng)目:

國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)51571047,51871039)


Effects of B content on structure evolution and magnetic properties of melt-spun Fe90-xPt10Bx alloys
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Affiliation:

1.Key Laboratory of Materials Modification by Laser,Ion,and Electron Beams Ministry of Education,School of Materials Science and Engineering,Dalian University of Technology;2.Institute for Materials Research,Tohoku University,Sendai -,Japan

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    摘要:

    本工作研究了低Pt含量的Fe90-xPt10Bx (x=15~40,原子分?jǐn)?shù),%)系液態(tài)急冷合金熱處理前后的組織結(jié)構(gòu)和磁性能。結(jié)果表明,x由15增加至25~30可提高合金的非晶形成能力,急冷合金由非晶+fcc-FePt復(fù)相組織轉(zhuǎn)變?yōu)閱我环蔷B(tài)結(jié)構(gòu)；當(dāng)x進(jìn)一步增加至35和40時(shí),合金分別由fcc-FePt+Fe2B+FeB和L10-FePt+FeB納米復(fù)相組織構(gòu)成。經(jīng)適當(dāng)熱處理后,x=15~20的合金具有fcc-FePt+Fe2B復(fù)相組織而呈軟磁性；x=25~40的合金形成了由有序面心四方結(jié)構(gòu)的永磁L10-FePt相和軟磁Fe2B/FeB組成的納米復(fù)相組織,顯示出永磁特性,其中x=30的合金經(jīng)823 K熱處理900 s后具有最佳的永磁性能,矯頑力、剩磁和最大磁能積分別為173.2 kA/m,1.20 T和88.3 kJ/m3,其優(yōu)異的永磁性能源于分布均勻、平均晶粒尺寸約為15 nm的永磁L10-FePt相和軟磁Fe2B相間的交換耦合作用。

    Abstract:

    The structure evolution and magnetic properties of melt-spun Fe90-xPt10Bx (x = 20–40) alloys before and after annealing have been investigated. The increase of x from 15 to 25–30 changes the melt-spun structure from a composite composed of amorphous and fcc-FePt phases to a single amorphous phase. Further increasing x to 35 and 40 results in the formation of fcc-FePt + Fe2B + FeB and L10-FePt + FeB phases, respectively. After appropriate annealing, dual phases of fcc-FePt + Fe2B are formed for the alloys with x = 15–20, which have soft magnetic properties, while the nanocomposite structure consisting of L10-FePt together with Fe2B and /or FeB phases are obtained for the alloys with x = 25–40, which exhibit the characteristics of the nanocomposite magnets. The best hard magnetic properties are obtained for the alloy with x = 30 annealed at 823 K for 900 s, of which the coercivity, remanence, and maximum energy product are 173.2 kA/m, 1.20 T, and 88.3 kJ/m3, respectively. The good hard magnetic performance is due to the formation of a more fine and homogeneous L10-FePt /Fe2B nanocomposite structure with an average grain size of about 15 nm.

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尹美玲,馬殿國(guó),李艷輝,殷晨亮,戚琳,Yubuta Kunio,張偉. B含量對(duì)Fe90-xPt10Bx液態(tài)急冷合金組織結(jié)構(gòu)和磁性能的影響[J].稀有金屬材料與工程,2021,50(12):4445~4449.[Yin Meiling, Ma Dianguo, Li Yanhui, Yin Chenliang, Qi Lin, Yubuta Kunio, Zhang Wei. Effects of B content on structure evolution and magnetic properties of melt-spun Fe90-xPt10Bx alloys[J]. Rare Metal Materials and Engineering,2021,50(12):4445~4449.]
DOI：10.12442/j. issn.1002-185X.20210011

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歷史
  • 收稿日期:2021-01-07
  • 最后修改日期:2021-02-02
  • 錄用日期:2021-03-22
  • 在線發(fā)布日期: 2022-01-09
  • 出版日期: 2021-12-24