INVESTIGADORES
FABIETTI Luis Maria Rodolfo
artículos
Título:
Elasticity in nanocrystalline Nd2Fe14B+Fe magnetic composites
Autor/es:
S. E. URRETA; H. R SALVA; A. A GHILARDUCCI; O. V. BILLONI; L. M FABIETTI
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2002 vol. 320 p. 297 - 299
ISSN:
0921-4526
Resumen:
The dynamic Young modulus (E) of magnetic Nd2Fe14B+aFe nanocomposites is investigated with mechanicalspectroscopy techniques (vibrating reed configuration, fE1:5 kHz eo106). Reduced values of E are obtained (88152 GPa) as compared with that predicted by the rule of mixtures for the composite (164 GPa). Three contributions to this reduction are briefly discussed: a large volume fraction of the specimen with grain boundary like structure; internal pores, resulting from the high cooling rate during processing (B106 K=min) and magneto-mechanical effects. Evenwhen porosity is identified as the principal cause of modulus reduction, magnetic effects are also detected.
