Acid-assisted consolidation of powder compacts: Cold-welding or cold sintering

M. P. Dariel, M. Ratzker, F. C. Eichmiller

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Silver powder that has been treated in dilute fluoroboric acid solution and compacted at room temperature displays surprisingly elevated flexural and even tensile strength. The density and mechanical strength values increase with increasing compaction pressure. The flexural strength and the elastic moduli of silver powder compacted at 1 GPa, as determined by sound velocity measurements, reach values comparable to those of bulk silver. The results can be tentatively interpreted either in terms of an ambient temperature self-soldering effect of silver in the presence of the fluoroboric acid, acting as a fluxing agent, or as cold liquid-phase sintering in an aqueous liquid medium.

Original languageEnglish
Pages (from-to)2601-2607
Number of pages7
JournalJournal of Materials Science
Volume34
Issue number11
DOIs
StatePublished - 1 Jan 1999

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