Quanitative Analysis of the Polymer/Metal Powder Magentic Composites Compacts Structure

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The work pertains to research of inhomogeneity level of the composite compacts manufactured from flaky metal particles and polymer binder. In the present investigation, magnetically hard Nd-Fe-B powders were used. The composite matrix was in all cases polystyrene. Volume fraction of the powders in composites was 40 ÷ 54%. As the forming method injection moulding was used. Granulates were obtained from powders and polystyrene dissolved with toluene. Produced cylindrical specimens had 10 mm in diameter and 4 mm in height. The structure of specimens was determined on the basis on quantitative analysis of the micrographs of axial sections. The analysis of binary images of metallographic specimens allowed to determine homogeneity and directions of flake distribution. Standard deviation of surface fraction is a measure of inhomogeneity which shows relatively well both local and general differences in the distribution of particles. The greater the volume of powder Vp in composites, the lower standard deviation S. The size of particles also influences the value of standard deviation. The greater the size of particles in a composite, the greater the values of S. In the next research, information about inhomogeneity will be useful in estimation of distribution of mechanical and magnetic parameters of the compacts (dielectromagnets) formed in this way.

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Edited by:

A. Szczotok, J. Pietraszek, N. Radek and A. Gądek-Moszczak

Pages:

23-28

Citation:

L. Paszkowski et al., "Quanitative Analysis of the Polymer/Metal Powder Magentic Composites Compacts Structure", Advanced Materials Research, Vol. 874, pp. 23-28, 2014

Online since:

January 2014

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$41.00

[1] I. Gruin, Polimer Materials, PWN, Warszawa, 2003. (in Polish).

[2] W. Szlezyngier, Plastics Materials Vol. 1, 2, 3, FOSZE, Rzeszow, 1998. (in Polish).

[3] D. Biało, L. Paszkowski, Use of Injection Moulding to the Fabrication of Metal Powder Parts, X Seminar Plastics in Machine Design, Krakow 29. 09-01. 10. 2003, 29-32. (in Polish).

[4] D. Biało, A Method of Forming Parts from Powders by Injection Moulding, Proceedings of Advances in Electrotechnology Conf., Szklarska Poreba 14-16. 09. 1994, 235-240. (in Polish).

[5] M. Leonowicz, J. Wysłocki, Modern Magnets, WNT, Warszawa, 2005. (in Polish).

[6] L. Paszkowski, B. Ślusarek, D. Biało, Influence of Nd-Fe-B Powder Content on Magnetic Parameters of Injected Dielectromagnets, Ores and Non-Ferrous Metals 50 (2005) 140-143. (in Polish).

[7] Magnequench – http: /www. mqitechnology. com (20-03-2010).

[8] EMS Chemie – http: /www. ems-group. com (20-04-2011).

[9] DWORY SA Oswiecim – http: /www. chemoservis. pl (09-01-2011).

[10] L. Paszkowski, Influence of Nd-Fe-B Powders in Injection Moulded Magnetic Composites with Polymer Matrix on the Magnetic and Mechanical Properties, Ph. D. Thesis, Warsaw University of Technology, Faculty of Mechatronics, Warszawa, 2008. (in Polish).

[11] B. Ślusarek, L. Paszkowski, D. Biało, The Influence of Kind Powder on Physical Properties of Nd-Fe-B Dielectromagnets, Euro PM 2004 Conference Proceedings, Vol. 4, 555-560.

[12] B. Ślusarek, L. Paszkowski, D. Biało, Influence of Particle Shape on the Physical Properties of Powder Nd-Fe-B Dielectromagnets, Proc. of Advances in Electrotechnology Conf., Jamrozowa Polana 2003, Wroclaw University of Technology Publishing House No 38, series: Conf. No 13, 2003, 259-262. (in Polish).

[13] http: /www. labmat. pw. plock. pl/metal/metilo/metod2. htm (10-10-2012) (in Polish).