Elastic constants of porous silver compacts after acid assisted consolidation at room temperature

O. Yeheskel, M. Shokhat, M. Ratzker, M. P. Dariel

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Acid assisted consolidation (AAC) is a technique that provides elevated levels of cohesiveness to silver powder compacts without recourse to a high temperature treatment. Ultrasonic techniques were used to measure the elastic constants of high purity silver compacts as a function of several processing variables. The elastic moduli of untreated (NT) samples were found to be significantly lower than those of samples that had undergone AAC and compacted at the same pressure. Post compaction sintering increases the elastic constants of both AAC and NT samples. The results indicate that the elastic constants are dependent not only on the density that was attained but also on the processing route that was followed. The elastic constant of a porous metal, M, can be expressed as M = M0gφ, where M0 is the elastic modulus of the bulk metal, g is a geometrical factor that reflects the interparticle contact area and @@@ is a quality factor that depends on the nature of the interparticle interfaces. The results suggest that sound wave velocity is a parameter more appropriate than density for predicting the elastic moduli of porous metallic compacts.

Original languageEnglish
Pages (from-to)1219-1225
Number of pages7
JournalJournal of Materials Science
Volume36
Issue number5
DOIs
StatePublished - 1 Mar 2001

Fingerprint

Dive into the research topics of 'Elastic constants of porous silver compacts after acid assisted consolidation at room temperature'. Together they form a unique fingerprint.

Cite this