Microstructure, magnetic and mechanical properties of Ni-Zn ferrites prepared by Powder Injection Moulding


Autoria(s): Gutierrez Lopez, J.; Rodriguez Senin, E.; Pastor Caño, Jose Ignacio; Paris, Anna; Martin Sanz, Antonia; Levenfeld, B.; Várez, A.
Data(s)

01/06/2011

Resumo

Nowadays, the electronic industry demands small and complex parts as a consequence of the miniaturization of electronic devices. Powder injection moulding (PIM) is an emerging technique for the manufacturing of magnetic ceramics. In this paper, we analyze the sintering process, between 900 °C and 1300 °C, of Ni–Zn ferrites prepared by PIM. In particular, the densification behaviour, microstructure and mechanical properties of samples with toroidal and bar geometry were analyzed at different temperatures. Additionally, the magnetic behaviour (complex permeability and magnetic losses factor) of these compacts was compared with that of samples prepared by conventional powder compaction. Finally, the mechanical behaviour (elastic modulus, flexure strength and fracture toughness) was analyzed as a function of the powder loading of feedstock. The final microstructure of prepared samples was correlated with the macroscopic behaviour. A good agreement was established between the densities and population of defects found in the materials depending on the sintering conditions. In general, the final mechanical and magnetic properties of PIM samples were enhanced relative those obtained by uniaxial compaction.

Formato

application/pdf

Identificador

http://oa.upm.es/12136/

Idioma(s)

eng

Publicador

E.T.S.I. Caminos, Canales y Puertos (UPM)

Relação

http://oa.upm.es/12136/2/INVE_MEM_2011_108879.pdf

http://dx.doi.org/10.1016/j.powtec.2011.02.008

info:eu-repo/semantics/altIdentifier/doi/10.1016/j.powtec.2011.02.008

Direitos

http://creativecommons.org/licenses/by-nc-nd/3.0/es/

info:eu-repo/semantics/openAccess

Fonte

Powder Technology, ISSN 0032-5910, 2011-06, Vol. 210, No. 1

Palavras-Chave #Ingeniería Civil y de la Construcción #Materiales
Tipo

info:eu-repo/semantics/article

Artículo

PeerReviewed