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Process for manufacturing colored gold artifacts

Grant number: 04/14290-1
Support Opportunities:Research Grants - Innovative Research in Small Business - PIPE
Duration: June 01, 2005 - July 31, 2009
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Transformation Metallurgy
Principal Investigator:Edval Goncalves de Araujo
Grantee:Edval Goncalves de Araujo
Host Company:Edval Gonçalves de Araújo - ME
City: Sorocaba
Associated grant(s):11/51055-4 - Manufacturing colored gold wedding rings, AP.PIPE3


After obtaining colored gold powder by high energy milling in a project supported by PIPE, the company seeks to carry out in this project research into a new way of producing jewelry in Brazil.What is proposed here is the development of the technology of conformation of colored gold powders by compactation and subsequent sinterization. The technological innovation is present in the application of powder metallurgy techniques in jewelry, thus allowing the configuration of complex pieces, which could not be achieved with casting techniques. In addition, the finishing of the jewels occurs with a fewer number of stages compared to conventional techniques. The first phase of this project will research the production of pieces of red (solid solution), purple (intermetallic) and blue (surface treatment) gold alloys. For each colored gold alloy, the following processing parameters will be analyzed: condition for the re-cooking of the powder; temperature and time of sinterization and thermic treatment of the pieces; condition of surface finish. In the second phase, the results obtained should serve as a basis for the production of pieces in the other colors developed: green, white, black, gray, pink, yellow and their tonalities. (AU)

Articles published in Pesquisa FAPESP Magazine about the research grant:
Orfebrería multicolor 
Colored gold 
Articles published in Agência FAPESP Newsletter about the research grant:
Articles published in other media outlets (0 total):
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