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The role of chemical composition and processing conditions on soft magnetic materials behaviour

R. BIDULSKÝ1, M. ACTIS GRANDE1, L. FERRARIS1, J BIDULSKÁ2

Affiliation

  1. Politecnico di Torino-Alessandria Campus, Viale T. Michel 5, 15100 Alessandria, Italy
  2. Faculty of Metallurgy, Technical University of Košice, Letná 9, 042 00 Slovakia

Abstract

The present paper focused on the analysis of the fracture surfaces and magnetic properties of a new development Insulated Iron Powder Compound (IIPC) with addition of the aluminium alloy in order to investigated bonding evolution in investigated materials. Results show that in the pressed state, mainly pores act as crack initiators and due to their presence the distribution of stress is inhomogeneous across the cross section and leads to the reduction of the effective load bearing area. Heat treatment supplement to diffusion and stress relaxation, therefore, reduce their size. The lower values of impact energy are confirmed by brittle fracture observed thorough fracture surfaces for both processing conditions. Investigation of fracture surfaces concluded that improvements in bonding during the pressing process and heat treatment can be helpful in the development of Soft Magnetic Composite (SMC) to give a suitable combination between pressing pressure, annealing temperature and time as well as magnetic properties..

Keywords

soft magnetic material, aluminium alloy, fracture surface.

Submitted at: May 28, 2010
Accepted at: June 16, 2010

Citation

R. BIDULSKÝ, M. ACTIS GRANDE, L. FERRARIS, J BIDULSKÁ, The role of chemical composition and processing conditions on soft magnetic materials behaviour, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 6, pp. 1356-1359 (2010)