Journal
MATERIALS AND MANUFACTURING PROCESSES
Volume 31, Issue 12, Pages 1589-1596Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10426914.2015.1004707
Keywords
Cavitation; Deagglomeration; Nanocomposite; Ultrasonic-casting
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Noncontact ultrasonic casting of nanocomposite has advantages over the contact method. Some of the advantages are (a) relatively uniform intensity of ultrasonic wave within the mold and (b) no dissolution of metal from the probe into the liquid metal. It also has disadvantages over the contact method. Since the ultrasonic action and cooling cum solidification occur simultaneously one needs to ensure completion of deagglomeration before the initiation of solidification. In the current study mathematical models of mold cooling cum solidification and deagglomeration have been developed to identify correct conditions for the noncontact ultrasonic casting. Using this approach a combination of casting parameters that will ensure complete deagglomeration of nanodispersoid was identified and Al-Al2O3 nanocomposite, in which Al2O3 nanoparticles are separated from each other, was successfully cast using noncontact ultrasonic casting.
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