Mechanical properties of injection molded NdFeB permanent magnets

M. G. Garrell; Bao Min Ma; E. Lara-Curzio; A. J. Shih; R. O. Scattergood

doi:10.1109/INTMAG.2002.1000823

Mechanical properties of injection molded NdFeB permanent magnets

M. G. Garrell, Bao Min Ma, E. Lara-Curzio, A. J. Shih, R. O. Scattergood

Energy Science and Technology Directorat

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Recent developments in the injection molding of PPS (polyphenylenesulfide) containing NdFeB magnetic powders has enabled the high-volume, cost-effective production of high performance magnets for energy-efficient motors and actuators in automotive applications. This study investigates the mechanical properties of these magnets according to ASTM standards D638-99 and D790-99. Samples with different volume concentrations of NdFeB powders were evaluated at temperatures between -40°C and 180°C, which cover the range of temperatures expected in automotive applications. At each temperature, four samples were tested and the average of these four data sets were used to represent the properties of the injection molded magnetic material. Test results show significant differences in tensile strength at cryogenic, room, and operating temperatures. The tensile strength ranges from 60 to 80 MPa at 22 and -44°C and drops to below 23 MPa at 100 and 180°C. Scanning Electron Microscopy was used to examine the fracture surfaces and gain insights on the failure mechanisms. The results of this study can be used for material selection by motor and actuator designs and for further improvement of the injection molding process. Tensile stress-strain curves for PPS injection molded samples with different volume concentration of NdFeB at four temperatures are shown and reveal the increasing compliance of the material with test temperature. SEM pictures of the fracture surface of samples tested at -40 and 180°C show the effect of temperature on the fracture pattern of the PPS bond.

Original language	English
Title of host publication	INTERMAG Europe 2002 - IEEE International Magnetics Conference
Editors	J. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, Jo De Boeck, R. Wood
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	0780373650, 9780780373655
DOIs	https://doi.org/10.1109/INTMAG.2002.1000823
State	Published - 2002
Event	2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands Duration: Apr 28 2002 → May 2 2002

Publication series

Name	INTERMAG Europe 2002 - IEEE International Magnetics Conference

Conference

Conference	2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
Country/Territory	Netherlands
City	Amsterdam
Period	04/28/02 → 05/2/02

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1109/INTMAG.2002.1000823

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Garrell, M. G., Ma, B. M., Lara-Curzio, E., Shih, A. J., & Scattergood, R. O. (2002). Mechanical properties of injection molded NdFeB permanent magnets. In J. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, J. De Boeck, & R. Wood (Eds.), INTERMAG Europe 2002 - IEEE International Magnetics Conference Article 1000823 (INTERMAG Europe 2002 - IEEE International Magnetics Conference). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2002.1000823

Garrell, M. G. ; Ma, Bao Min ; Lara-Curzio, E. et al. / Mechanical properties of injection molded NdFeB permanent magnets. INTERMAG Europe 2002 - IEEE International Magnetics Conference. editor / J. Fidler ; B. Hillebrands ; C. Ross ; D. Weller ; L. Folks ; E. Hill ; M. Vazquez Villalabeitia ; J. A. Bain ; Jo De Boeck ; R. Wood. Institute of Electrical and Electronics Engineers Inc., 2002. (INTERMAG Europe 2002 - IEEE International Magnetics Conference).

@inproceedings{243c921c2af44d599521c2080698c679,

title = "Mechanical properties of injection molded NdFeB permanent magnets",

abstract = "Recent developments in the injection molding of PPS (polyphenylenesulfide) containing NdFeB magnetic powders has enabled the high-volume, cost-effective production of high performance magnets for energy-efficient motors and actuators in automotive applications. This study investigates the mechanical properties of these magnets according to ASTM standards D638-99 and D790-99. Samples with different volume concentrations of NdFeB powders were evaluated at temperatures between -40°C and 180°C, which cover the range of temperatures expected in automotive applications. At each temperature, four samples were tested and the average of these four data sets were used to represent the properties of the injection molded magnetic material. Test results show significant differences in tensile strength at cryogenic, room, and operating temperatures. The tensile strength ranges from 60 to 80 MPa at 22 and -44°C and drops to below 23 MPa at 100 and 180°C. Scanning Electron Microscopy was used to examine the fracture surfaces and gain insights on the failure mechanisms. The results of this study can be used for material selection by motor and actuator designs and for further improvement of the injection molding process. Tensile stress-strain curves for PPS injection molded samples with different volume concentration of NdFeB at four temperatures are shown and reveal the increasing compliance of the material with test temperature. SEM pictures of the fracture surface of samples tested at -40 and 180°C show the effect of temperature on the fracture pattern of the PPS bond.",

author = "Garrell, {M. G.} and Ma, {Bao Min} and E. Lara-Curzio and Shih, {A. J.} and Scattergood, {R. O.}",

note = "Publisher Copyright: {\textcopyright}2002 IEEE.; 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 ; Conference date: 28-04-2002 Through 02-05-2002",

year = "2002",

doi = "10.1109/INTMAG.2002.1000823",

language = "English",

series = "INTERMAG Europe 2002 - IEEE International Magnetics Conference",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

editor = "J. Fidler and B. Hillebrands and C. Ross and D. Weller and L. Folks and E. Hill and {Vazquez Villalabeitia}, M. and Bain, {J. A.} and {De Boeck}, Jo and R. Wood",

booktitle = "INTERMAG Europe 2002 - IEEE International Magnetics Conference",

}

Garrell, MG, Ma, BM, Lara-Curzio, E, Shih, AJ & Scattergood, RO 2002, Mechanical properties of injection molded NdFeB permanent magnets. in J Fidler, B Hillebrands, C Ross, D Weller, L Folks, E Hill, M Vazquez Villalabeitia, JA Bain, J De Boeck & R Wood (eds), INTERMAG Europe 2002 - IEEE International Magnetics Conference., 1000823, INTERMAG Europe 2002 - IEEE International Magnetics Conference, Institute of Electrical and Electronics Engineers Inc., 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002, Amsterdam, Netherlands, 04/28/02. https://doi.org/10.1109/INTMAG.2002.1000823

Mechanical properties of injection molded NdFeB permanent magnets. / Garrell, M. G.; Ma, Bao Min; Lara-Curzio, E. et al.
INTERMAG Europe 2002 - IEEE International Magnetics Conference. ed. / J. Fidler; B. Hillebrands; C. Ross; D. Weller; L. Folks; E. Hill; M. Vazquez Villalabeitia; J. A. Bain; Jo De Boeck; R. Wood. Institute of Electrical and Electronics Engineers Inc., 2002. 1000823 (INTERMAG Europe 2002 - IEEE International Magnetics Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Mechanical properties of injection molded NdFeB permanent magnets

AU - Garrell, M. G.

AU - Ma, Bao Min

AU - Lara-Curzio, E.

AU - Shih, A. J.

AU - Scattergood, R. O.

PY - 2002

Y1 - 2002

N2 - Recent developments in the injection molding of PPS (polyphenylenesulfide) containing NdFeB magnetic powders has enabled the high-volume, cost-effective production of high performance magnets for energy-efficient motors and actuators in automotive applications. This study investigates the mechanical properties of these magnets according to ASTM standards D638-99 and D790-99. Samples with different volume concentrations of NdFeB powders were evaluated at temperatures between -40°C and 180°C, which cover the range of temperatures expected in automotive applications. At each temperature, four samples were tested and the average of these four data sets were used to represent the properties of the injection molded magnetic material. Test results show significant differences in tensile strength at cryogenic, room, and operating temperatures. The tensile strength ranges from 60 to 80 MPa at 22 and -44°C and drops to below 23 MPa at 100 and 180°C. Scanning Electron Microscopy was used to examine the fracture surfaces and gain insights on the failure mechanisms. The results of this study can be used for material selection by motor and actuator designs and for further improvement of the injection molding process. Tensile stress-strain curves for PPS injection molded samples with different volume concentration of NdFeB at four temperatures are shown and reveal the increasing compliance of the material with test temperature. SEM pictures of the fracture surface of samples tested at -40 and 180°C show the effect of temperature on the fracture pattern of the PPS bond.

AB - Recent developments in the injection molding of PPS (polyphenylenesulfide) containing NdFeB magnetic powders has enabled the high-volume, cost-effective production of high performance magnets for energy-efficient motors and actuators in automotive applications. This study investigates the mechanical properties of these magnets according to ASTM standards D638-99 and D790-99. Samples with different volume concentrations of NdFeB powders were evaluated at temperatures between -40°C and 180°C, which cover the range of temperatures expected in automotive applications. At each temperature, four samples were tested and the average of these four data sets were used to represent the properties of the injection molded magnetic material. Test results show significant differences in tensile strength at cryogenic, room, and operating temperatures. The tensile strength ranges from 60 to 80 MPa at 22 and -44°C and drops to below 23 MPa at 100 and 180°C. Scanning Electron Microscopy was used to examine the fracture surfaces and gain insights on the failure mechanisms. The results of this study can be used for material selection by motor and actuator designs and for further improvement of the injection molding process. Tensile stress-strain curves for PPS injection molded samples with different volume concentration of NdFeB at four temperatures are shown and reveal the increasing compliance of the material with test temperature. SEM pictures of the fracture surface of samples tested at -40 and 180°C show the effect of temperature on the fracture pattern of the PPS bond.

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DO - 10.1109/INTMAG.2002.1000823

M3 - Conference contribution

AN - SCOPUS:85017237852

T3 - INTERMAG Europe 2002 - IEEE International Magnetics Conference

BT - INTERMAG Europe 2002 - IEEE International Magnetics Conference

A2 - Fidler, J.

A2 - Hillebrands, B.

A2 - Ross, C.

A2 - Weller, D.

A2 - Folks, L.

A2 - Hill, E.

A2 - Vazquez Villalabeitia, M.

A2 - Bain, J. A.

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PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002

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ER -

Garrell MG, Ma BM, Lara-Curzio E, Shih AJ, Scattergood RO. Mechanical properties of injection molded NdFeB permanent magnets. In Fidler J, Hillebrands B, Ross C, Weller D, Folks L, Hill E, Vazquez Villalabeitia M, Bain JA, De Boeck J, Wood R, editors, INTERMAG Europe 2002 - IEEE International Magnetics Conference. Institute of Electrical and Electronics Engineers Inc. 2002. 1000823. (INTERMAG Europe 2002 - IEEE International Magnetics Conference). doi: 10.1109/INTMAG.2002.1000823

Mechanical properties of injection molded NdFeB permanent magnets

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