Ultrasonic assisted fabrication of particle reinforced bonds joining aluminum metal matrix composites

Mechanical and tribological properties of self-lubricating metal matrix nanocomposites reinforced by carbon nanotubes (CNTs) and graphene – A review

“…However, the task becomes more sophisticated in metals processing. Although high intensity ultrasonication during liquid metal processing has been employed in synthesizing nanocomposites, but still no experimental or simulation data is available in CNT reinforced nanocomposites confirming the complete and successful dispersion of these reinforcements in a metallic matrix [94][95][96][97].…”

Structure–property analysis of in-situ Al–MgAl2O4 metal matrix composites synthesized using ultrasonic cavitation

“…Cavitation bubbles of a particular size implodes during positive pressure cycle generating a temperature of ~5000 ⁰C and pressure of ~1000 MPa and forms a liquid jet of ~100 m/s in the vicinity of cavitation implosion region [23]. Simultaneously, acoustic streaming of 0.1m/s formed from the pulsation of the cavitation region ensures continuous stirring effect throughout the melt [24]. During ultrasonication, cavitation and acoustic streaming are believed to improve the wettability of parent oxides and enhance the displacement reactions.…”

Potential of an Al-Ti-MgAl2O4 Master Alloy and Ultrasonic Cavitation in the Grain Refinement of a Cast Aluminum Alloy

“…The influence of ultrasonic cavitation and acoustic streaming on the dispersion of ultrafine particles in molten metal has been studied elsewhere. [25,[27][28][29][30] It was experimentally demonstrated that the cavitation threshold pressure reduced from 800 to 550 kPa with the increase in alumina concentration in an aluminum melt from 0.005 to 0.1 wt pct. [27] In the present experimental conditions, particles of TiO 2 and reaction products and gases absorbed on their surface act as nucleation sites for cavitation.…”