TEM studies of the magnetic domain structure in HDDR-processed Nd-Fe-B type materials

Oliver Gutfleisch; Rex Harris; Pauline Thompson; AJ McGibbon; John Chapman

TEM studies of the magnetic domain structure in HDDR-processed Nd-Fe-B type materials

Oliver Gutfleisch, Rex Harris, Pauline Thompson, AJ McGibbon, John Chapman

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

Abstract

Transmission electron microscopy has been employed to characterise the physical and magnetic microstructure of a HDDR processed homogenised Nd12.8Fe69.2Co11Ga1B6 alloy. In addition, the microstructural development during the different stages has been studied by scanning electron microscopy. The disproportionated mixture consists of NdH2+/-x rods embedded in an alpha-(Fe, Co) matrix, very similar in appearance to that of the ternary alloy. The grain size in the recombined material was found to be in the range of 200-800nm. Continuous domains could be observed in thin sections of the alloy over significantly larger areas than that of the submicron grains. In the case of smaller grains, it was observed that the domain walls follow the grain boundaries, whereas in relatively larger grains it could be seen that the walls frequently cut through the grains.

Original language	English
Title of host publication	Rare-Earth Magnets and their Applications, Vols 1 and 2 - Proceedings of the 14th International Workshop
Publisher	World Scientific Publishing
Pages	A359-A368
Number of pages	10
Volume	1-2
Publication status	Published - 1996

Cite this

@inproceedings{b7cd10af38b04b90899d97730b5eb05a,

title = "TEM studies of the magnetic domain structure in HDDR-processed Nd-Fe-B type materials",

abstract = "Transmission electron microscopy has been employed to characterise the physical and magnetic microstructure of a HDDR processed homogenised Nd12.8Fe69.2Co11Ga1B6 alloy. In addition, the microstructural development during the different stages has been studied by scanning electron microscopy. The disproportionated mixture consists of NdH2+/-x rods embedded in an alpha-(Fe, Co) matrix, very similar in appearance to that of the ternary alloy. The grain size in the recombined material was found to be in the range of 200-800nm. Continuous domains could be observed in thin sections of the alloy over significantly larger areas than that of the submicron grains. In the case of smaller grains, it was observed that the domain walls follow the grain boundaries, whereas in relatively larger grains it could be seen that the walls frequently cut through the grains.",

author = "Oliver Gutfleisch and Rex Harris and Pauline Thompson and AJ McGibbon and John Chapman",

year = "1996",

language = "English",

volume = "1-2",

pages = "A359--A368",

booktitle = "Rare-Earth Magnets and their Applications, Vols 1 and 2 - Proceedings of the 14th International Workshop",

publisher = "World Scientific Publishing",

address = "United States",

}

TEM studies of the magnetic domain structure in HDDR-processed Nd-Fe-B type materials. / Gutfleisch, Oliver; Harris, Rex; Thompson, Pauline et al.
Rare-Earth Magnets and their Applications, Vols 1 and 2 - Proceedings of the 14th International Workshop. Vol. 1-2 World Scientific Publishing, 1996. p. A359-A368.

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

TY - GEN

T1 - TEM studies of the magnetic domain structure in HDDR-processed Nd-Fe-B type materials

AU - Gutfleisch, Oliver

AU - Harris, Rex

AU - Thompson, Pauline

AU - McGibbon, AJ

AU - Chapman, John

PY - 1996

Y1 - 1996

N2 - Transmission electron microscopy has been employed to characterise the physical and magnetic microstructure of a HDDR processed homogenised Nd12.8Fe69.2Co11Ga1B6 alloy. In addition, the microstructural development during the different stages has been studied by scanning electron microscopy. The disproportionated mixture consists of NdH2+/-x rods embedded in an alpha-(Fe, Co) matrix, very similar in appearance to that of the ternary alloy. The grain size in the recombined material was found to be in the range of 200-800nm. Continuous domains could be observed in thin sections of the alloy over significantly larger areas than that of the submicron grains. In the case of smaller grains, it was observed that the domain walls follow the grain boundaries, whereas in relatively larger grains it could be seen that the walls frequently cut through the grains.

AB - Transmission electron microscopy has been employed to characterise the physical and magnetic microstructure of a HDDR processed homogenised Nd12.8Fe69.2Co11Ga1B6 alloy. In addition, the microstructural development during the different stages has been studied by scanning electron microscopy. The disproportionated mixture consists of NdH2+/-x rods embedded in an alpha-(Fe, Co) matrix, very similar in appearance to that of the ternary alloy. The grain size in the recombined material was found to be in the range of 200-800nm. Continuous domains could be observed in thin sections of the alloy over significantly larger areas than that of the submicron grains. In the case of smaller grains, it was observed that the domain walls follow the grain boundaries, whereas in relatively larger grains it could be seen that the walls frequently cut through the grains.

M3 - Conference contribution

VL - 1-2

SP - A359-A368

BT - Rare-Earth Magnets and their Applications, Vols 1 and 2 - Proceedings of the 14th International Workshop

PB - World Scientific Publishing

ER -

TEM studies of the magnetic domain structure in HDDR-processed Nd-Fe-B type materials

Abstract

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