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Initial Survey on Fracture Toughness of Commerical Nd2Fe14B

Published online by Cambridge University Press:  22 February 2011

J.A. Horton  and
J.H. Schneibel
J.A. Horton
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory P.O. Box 2008, Oak Ridge, TN 37831-6115
J.H. Schneibel
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory P.O. Box 2008, Oak Ridge, TN 37831-6115
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Abstract

Nd2Fe14B is currently the best (highest energy product) hard magnet available. Like most magnetic materials, it is rather brittle. The fracture toughness of specimens of commercially available Nd2Fe14B magnets were measured using a chevron notch three point bend test. Values ranged from nearly 2 to 5.5 MPa√m. Consistent differences were found between the five different types of materials tested. In this initial survey, insufficient tests were done for good statistics to be obtained. However, it appears that this test will allow differences in fracture toughness between alloys with different compositions and fabricated by different production methods to be measured and tracked as improvements are made.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 1107
Copyright
Copyright © Materials Research Society 1995

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