Sonochemical formation of intermetallic coatings
- Texas Tech Univ., Lubbock, TX (United States)
An energy-dispersive X-ray (EDX) study of the agglomerates produced during the sonication of a series of mixed-metal powders in decane indicates that metal particles are both fused by the action of ultrasound and develop coatings which are intermetallic in nature. The principal mechanism of these effects is believed to be interparticle collision caused by the rapid movement of particles of less than 50 {mu}m diameter which are propelled by shockwaves generated at cavitation sites. By examination of mixed-metal systems including Ni/Co, Al/Ni, Al/Co, Ni/Mg, 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 fusion of Cu and Mo is particularly intriguing, as these two metals are immiscible below 1000{degrees}C. This indicates the enormous impact temperatures produced in sonically induced collisions. The mechanisms of intermetallic coatings produced via ultrasound are discussed. 26 refs., 4 figs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 98756
- Journal Information:
- Chemistry of Materials, Vol. 6, Issue 11; Other Information: PBD: Nov 1994
- Country of Publication:
- United States
- Language:
- English
Similar Records
Making NiTi intermetallic compound coating using laser plasma complex spraying
Ion-irradiation-induced transformations in intermetallic alloys: formation and stability