Influence of additional compounds on coercivity of sintered Nd-Fe-B magnets

被引：0

作者：

Thanh Pham ^{[1
,2
]}

Duong Nguyen ^{[2
,3
]}

Yen Nguyen ^{[1
,2
]}

Lam Nguyen ^{[3
]}

Quang Dinh ^{[4
]}

Ngoc Nguyen ^{[4
]}

Victor, Koledov ^{[5
]}

Alexander, Kamantsev ^{[5
]}

Alexey, Mashirov ^{[5
]}

Dan Nguyen ^{[1
,2
]}

机构：

[1] Vietnam Acad Sci & Technol, Inst Mat Sci, 18 Hoang Quoc Viet, Hanoi, Vietnam

[2] Vietnam Acad Sci & Technol, Grad Univ Sci & Technol, 18 Hoang Quoc Viet, Hanoi, Vietnam

[3] Hanoi Pedag Univ 2, Fac Phys, 32 Nguyen Van Linh, Vinh Phuc, Vietnam

[4] Hong Duc Univ, 565 Quang Trung, Dong Ve, Thanh Hoa, Vietnam

[5] RAS, Kotelnikov Inst Radioengn & Elect, Moscow, Russia

来源：

MOSCOW INTERNATIONAL SYMPOSIUM ON MAGNETISM (MISM 2017) | 2018年 / 185卷

关键词：

CORROSION-RESISTANCE; ENHANCEMENT; MICROSTRUCTURE; CU; DY;

D O I：

10.1051/epjconf/201818504031

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, we investigated the influence of additional compounds of Dy-Nb-Al, Nd-Cu-Al... on the coercivity of the sintered Nd165Fe77B65 magnets The additional compounds were first prepared by arc -melting method and then ground into particles with size in the range of 40 - 80 nm using a high energy ball milling method. After that, the additional powder were mixed with micrometer Nd-Fe-B powder before magnetic anisotropic pressing, vacuum sintering and annealing. The structure of the magnets was thoroughly analyzed using X-ray diffraction and electron microscopy techniques. The magnetic properties of the magnets were investigated on a pulsed field magnetometer. The results show that the coercivity of the sintered Nd-Fe-B magnets can be improved by introducing additional nanoparticles to their grain boundaries. The improvement of the coercivity of the magnets is clearly dependent on composition and fraction of the additional compounds. The coercivity has been enhanced 40% for the magnets by adding 3 wt% of the Dy-free compound of Nd40Cu30Al30.

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页数：4

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