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Article
Kinetic transformation of nanofilamentary au Metal-Metal Composites
Gold Bulletin
  • Kageeporn Wongpreedee, Srinakharinwirot University
  • Alan Mark Russell, Iowa State University
Document Type
Article
Publication Date
9-1-2004
DOI
10.1007/BF03215210
Abstract
Recovery and recrystallization of Au wire can degrade strength and alter conductivity properties during exposure to elevated temperature. Au Deformation Processed Metal-Metal Composites (Au DMMC’s) are being developed for electronic applications requiring high conductivity and high strength. This paper discusses the relationships between microstructure, strength, and resistivity of Au DMMC’s. Au DMMC samples were prepared by a powder metallurgy technique and processed into wire down to diameters as low as 120μm. The extensive deformation reshaped the initially equi-axed powder into filaments that are 30 to 100 nm in diameter and 16 to 180 mm in length, which confers high strength. The high conductivity can be explained by electrons flowing parallel to the filamentary microstructure aligned with the wire axis. Au DMMC’s were found to have good thermal stability compared to conventional cold-worked Au interconnection wires. Although these composites will revert to solid solutions if exposed to high temperatures for prolonged times, their relative stability is sufficient to allow them to maintain their two-phase microstructure during the anticipated lifetime temperature profiles of many products.
Comments

This article is from Gold Bulletin 37 (2004): 174–180, doi:10.1007/BF03215210.

Rights
This article is published under the Creative Commons Attribution License.
Copyright Owner
The authors
Language
en
Date Available
2013-11-12
File Format
application/pdf
Citation Information
Kageeporn Wongpreedee and Alan Mark Russell. "Kinetic transformation of nanofilamentary au Metal-Metal Composites" Gold Bulletin Vol. 37 Iss. 3–4 (2004) p. 174 - 180
Available at: http://works.bepress.com/alan_russell/2/