Sonochemical production of intermetallic coatings in heterogeneous media

D. J. Casadonte, J. D. Sweet, M. S. Vedamuthu

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The production of 5-10 μm fused particles and agglomerates occurs when metal powders in hydrocarbon solvents are exposed to high-intensity ultrasound. The principle mechanism of particle fusion is believed to be interparticle collision caused by the rapid movement of particles propelled by shock waves generated at cavitation sites. An energy-dispersive X-ray (EDX) study of the agglomerates produced during the sonication of mixed-metal powders in decane indicates that not only are the metal particles fused by the action of ultrasound but that intermetallic coatings are also developed. By examination of mixed-metal systems (Ni/Co and Cu/Mo) with substantially different tribological characteristics, it has been determined that the coatings are generated by both adhesive wear and direct impact. The mechanisms of ultrasound-induced coatings are discussed.

Original languageEnglish
Pages (from-to)477-480
Number of pages4
JournalUltrasonics
Volume32
Issue number6
DOIs
StatePublished - Nov 1994

Keywords

  • sonochemistry
  • tribology
  • ultrasound-induced coatings

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