Paper Titles
Effects of Operational Variables on the Performance of Venturi Scrubbers with Circular Section
p.298
Influence of Forming on the Mechanical Properties of the Al + 50 % B4C System
p.304
Titanium Powder on Surface Conditioning of Osseointegrable Surgical Implants Topographics Aspects
p.310
Performance Assessment of Spray Formed AISI M2 High-Speed Steel Tools
p.315
Effect of High Energy Milling on the Magnetic Properties of the WC-10wt.%Co Cemented Carbides
p.322
Ultra High Carbon Steels Obtained by Powder Metallurgy
p.328
Structure and Properties of the 32CrMoV12-28 Steel Alloyed with WC Powder Using HPDL Laser
p.334
Densification and Microstructural Behaviour on the Sintering of Blended Elemental Ti-35Nb-7Zr-5Ta Alloy
p.341
Influence of the Addition of Rare-Earth Elements on the Sintering of Cemented Carbide
p.347

Effect of High Energy Milling on the Magnetic Properties of the WC-10wt.%Co Cemented Carbides

Article Preview

Abstract:

Cemented tungsten carbides were produced by liquid-phase sintering. In these work high energy milling (HEM) was used to produce homogeneous and finely grained powder mixtures. The milling effect on the magnetic properties of sintered samples is studied. Different mixtures in same composition (WC-10wt.%Co) were prepared by conventional mixture technique and wet HEM up to 300 hs in Planetary Mill. Magnetic hysteresis measurements on the sintered samples detected a significant increase in the coercitive field and a decrease on the saturation magnetization with milling time increasing. X-ray diffractogram show phase transformations with milling time. The Magnetic properties are correlated with phase relations and microstructural properties of the sintered samples.

You might also be interested in these eBooks
Advanced Powder Technology V View Preview

Info:

Periodical:

Materials Science Forum (Volumes 530-531)

Pages:

322-327

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.322

Citation:

Cite this paper

Online since:

November 2006

Authors:

J.B. Manuel, J.H. de Araújo, Franciné Alves Costa, Harim Revoredo de Macedo, Uilame Umbelino Gomes, A.G.P. Silva

Keywords:

Composite Powder and Sintering, High Energy Milling (HEM), Magnetisation

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Zhanng, F. L., C. Y. Wang, M. Zhhu., Nanostructured WC/Co composite power prepared by high energy ball milling. Guangdong University of Tecnology. Guangzhou 510090, China. (2003).

Google Scholar

[2] Chiaverine, V., Metalurgia do pó. Editora, Edile serviços gráficos. São Paulo-SP, 1992, pp.109-145. Brasil.

Google Scholar

[3] Bradbur,Y. S. Powder Metallurgy Equipment Manual. Metal Powder Industries Federation. New York, USA. (1986).

Google Scholar

[4] Lenel, F. V., Powder Metallurgy Principles and Application. Ed Princenton, Metal Powder Industries Federation. New Jersey, USA. pp.241-319, (1980).

Google Scholar

[5] German, R. M., Power Metallurgy Science. MPIF. Pricenton-New Jersey, Secod edition.

Google Scholar

[6] Gomes, U. U., Tecnologia dos Pós, Fundamentos e Aplicações. Universidade Federal do Rio Grande Norte-UFRN. Editora Universitária. Natal-RN. Brasil. 1995. P. 160. (in portuguese).

DOI: 10.22239/2317-269x.01494

Google Scholar

[7] Macedo, H. R. Primeiro Estagio de Sinterização de Ligas de Metal Duro, Degaseificação e Espalhamento de Metais Ligantes. Universidade Federal do Rio grande Norte-UFRN. CCET-Centro de Ciências Exatas e da Terra. Tese de Doutorado. Natal-RN, Brasil. (2002).

DOI: 10.22239/2317-269x.01494

Google Scholar

[8] Nerz, J. E., Kushner B. A. and Rotolico, A. J., Microstructural Evaluation of Tungsten Carbide-Cobalt Coatings, proceeding of the 4 th National Thermal Spraying Coference, Pittsburgh, PA, USA, (1991) pp.115-120.

DOI: 10.1007/bf02659015

Google Scholar

[9] Gorkunov, E., Ulyanov A. and Chulkina, A. Quality Inspection of Sintered powder Tungsten-Cobalto Products by Magnetic Technique. Institute of Engineering Science, Russian Academy of Science (Urals Branch), Ekaterinburg, Russia.

Google Scholar

[10] Krainer, H., Magnetic Properties of WC-Co Alloys. / Arch. Eisenhutten., 1950, V. 21. S. 119-121.

Google Scholar