Magneto‐Acoustic Mixing Technology: A Novel Method of Processing Metal‐Matrix Nanocomposites

Magneto-acoustic Interfacial Reaction-Based Nanoparticle Synthesis: A Direct Path to Manufacturing Metal Matrix Nanocomposites

“…[16,17] Shown schematically in Figure 1(a), MAMT is a technique that actuates a harmonic mechanical response by the interaction of orthogonal alternating and static magnetic fields, producing sonic waves. In this setup, a radio frequency (RF) field induces eddy currents in a liquid metal contained within a steel crucible, heating the sample.…”

“…With a static magnetic flux density of 18T, acoustic intensities of 85 W/cm 2 can be achieved near the container wall, which increase as acoustic waves propagate toward the centerline of the crucible by geometric amplification. [16] The cavitation threshold for light metals is estimated to be in the range of 0.5 to 1.0 MPa, [18,19] and thus, the entire melt should undergo cavitation. The influence of processing conditions on cavitation activation (based on previous analytical modeling and the estimated cavitation threshold range of 0.5 to 1.0 MPa) is shown in Figure 1(c), with sound pressure as a function of induction current density and magnetic field strength.…”

“…The influence of processing conditions on cavitation activation (based on previous analytical modeling and the estimated cavitation threshold range of 0.5 to 1.0 MPa) is shown in Figure 1(c), with sound pressure as a function of induction current density and magnetic field strength. [16,17] In the figure, white represents the cavitation region, black the noncavitation region, and the gradient is the cavitation threshold. In the model for acoustic pressure, B is magnetic flux density, J max is maximum current density, f is induction frequency, and q and b ad are the density and the adiabatic compressibility of the liquid, respectively.…”

“…This technology can be adapted to an interfacial reaction-based particle generation method because the interface (the crucible sides and the melt, shown in red in Figure 1(a)) is subjected to equal acoustic intensity throughout. [16] Whereas prior studies on this precise apparatus investigated dispersion of ex situ particles in Mg, [20] this study aims to evaluate the possibility of producing them through an in situ, interfacial reaction-based mechanism.…”