Consolidation and green body characteristics of gelcast metallic powder

Authors: Santos, R. F.; Cardoso, K. R.; Albers, A. P. F.; Ortega, F. S.

Source: Powder Metallurgy, Volume 50, Number 1, March 2007 , pp. 91-93(3)

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Abstract:

A preliminary study concerning the compaction of metallic powder was carried out in order to investigate a rarely explored route in powder metallurgy, to form complex geometry parts, known as gelcasting. Green bodies produced with as supplied stainless steel powder showed a tendency to form foam, which affected the surface finishing. The mechanical behaviour of green compacts was also affected by the processing additives present in the metallic powder. Organics in the as supplied powder were removed by thermal treatment at 500°C and additional samples were produced. Although no difference in green density was observed, these samples displayed better surface finish and mechanical characteristics, as a result of improved adhesion between the polymer network and particle surface. The results showed that the gelcasting process is able to produce green parts suitable for subsequent thermal treatment.

Keywords: STAINLESS STEEL; GREEN BODY; GELCASTING

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174329007X186426

Publication date: 2007-03-01

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