Effect of Ultrasonic Compaction of Nanopowder on Structure and Fracture Character of Zirconia Nanoceramics

Compressibility of the structural and functional ceramic nanopowders

“…During pressing the PUA was applied to a mould at different power of the ultrasonic generator over the range W PUA = 0-3 kW by the technique described in. [1][2][3] Compaction diagrams of each material in different pressing conditions were obtained under developed procedure of consecutive loading-unloading using on-line computer analysis of the powder densification (via a punch displacement) versus change of compaction pressure. 5 The compaction diagrams were constructed on five and more points; each point grew out averaging not less than three experiments.…”

“…[1][2][3] At optimum conditions of nanopowder compaction the method ensures uniform density distribution in articles having a complex form owing to even packaging particles when their vibration displacement is comparable with a particle or agglomerate size. Also interparticle and die-wall friction forces decrease under PUA which promotes fracture of agglomerates and nanostructure formation at sintering green compacts due to effects of mechanoactivation of particles.…”

Net shaping nanopowders with powerful ultrasonic action and methods of density distribution control

“…In the latter, a subgrain structure of nanoceramic with a layer thickness of 0?09 to 0?10 mm were observed within the grains. 14,15…”

Densification Mechanism of Soft Magnetic Composites Using Ultrasonic Compaction for Motors in EV Platforms

“…Khasanov et al reported the ultrasonic compaction of ceramic nano-powder [ 12 ]. Both studies made the following conclusions—the ultrasonic compaction during the ceramic nano-powder compaction (a) lowered lateral pressure to a greater degree in a low compaction pressure condition, (b) more effectively decreased an elastic after-effect in a high-pressure environment, and (c) improved the green compact quality [ 13 , 14 , 15 ].…”