Compression molding of anisotropic NdFeB bonded magnets in a polycarbonate matrix

被引：8

作者：

Mungale, Kaustubh ^{[1
,2
,3
]}

Lamichhane, Tej N. ^{[4
]}

Wang, Haobo ^{[4
,5
]}

Sales, Brian C. ^{[6
]}

Paranthaman, M. Parans ^{[4
]}

Vaidya, Uday Kumar ^{[1
,2
,3
]}

机构：

[1] Univ Tennessee, Tickle Coll Engn, Middle Dr, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Mfg Sci Div, 2350 Cherahala Blvd, Knoxville, TN 37932 USA

[3] Inst Adv Composites Mfg Innovat, 2360 Cherahala Blvd, Knoxville, TN 37932 USA

[4] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA

[5] Univ Tennessee, Bredesen Ctr, Knoxville, TN 37996 USA

[6] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

来源：

MATERIALIA | 2021年 / 19卷

关键词：

NdFeB; Bonded magnets; Polycarbonate; Twin screw extrusion; Polymer batch mixing; Compression molding; MECHANICAL-PROPERTIES; PERMANENT-MAGNETS; ND; FE;

D O I：

10.1016/j.mtla.2021.101167

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Anisotropic bonded Nd2Fe14B (NdFeB) magnets in a polycarbonate (PC) binder matrix are fabricated using a compression molding process. The weight fractions (w.f.) of NdFeB in PC on the batch mixer are 20, 50, 75, 85 and 95% compared to the twin screw extruder with 20, 50 and 75% respectively. The density of the 95% batch mixed magnets fabricated was 5.34 g/cm(3) and the magnetic properties are, intrinsic coercivity H-ci, = 942.99 kA/m, remanence B-r = 0.86 T, and energy product (BH)(max) = 120.96 kJ/m(3). The measured tensile properties are in the range of 27-59 MPa, comparable to that of polyamide (PA), polyphenylene sulfide (PPS) bonded magnets and demonstrating potential for bonded magnet applications. Scanning electron microscopy showed that the onset of failure occurs in the magnetic particle- matrix interface. This study demonstrates that compression additive molding technique can be used to fabricate high performance NdFeB polycarbonate composite magnets with improved mechanical properties.

引用

页数：6

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