Engulfment and pushing of Si3N4 and SiC particles during directional solidification of silicon under microgravity conditions

Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique

“…Silicon nitride has been applied in various areas due to its chemical durability, excellent hardness and high mechanical strength at high temperature [1][2]. Further, the combination of thermal, dielectric and high-temperature mechanical performance has led to implementation of silicon nitride in optoelectronic devices, nanowire reinforced ceramics and many other areas [3][4][5][6]. Li et al [7] have used Si 3 N 4 nanowires to reinforce mini-C/SiC composites and found that the matrix and fracture strength increase by about 100 % and 8 %, respectively.…”

Erlangen—An Important Center of Crystal Growth and Epitaxy: Major Scientific Results and Technological Solutions of the Last Four Decades

“…Motivated by the research on the directional solidification of multicrystalline silicon (see Section 5.1) Jochen Friedrich and his co‐workers started a research program in order to study the incorporation of foreign phase particles into silicon during crystal growth by experiments onboard the sounding rocket missions TEXUS 51 (2015), TEXUS 53 (2016), TEXUS 55 (2018). In these experiments it was found the melt flow has a strong impact on the engulfment of the foreign phase particles …”

“…To clarify this open question a series of space experiments were carried out (see Section 3.2). The outcome of these experiments was that the lift force which acts on the particles due to the melt flow could push the particles away from the solid–liquid interface, and thus would result in higher critical growth velocities under convective conditions …”

Migration Behavior of Inclusions at the Solidification Front in Oxide Metallurgy

“…To enhance the inclusion of particles captured by the solidification interface into the crystal, rather than aggregating to the end of solidification and causing inclusion aggregations [ 11 , 12 , 13 , 14 ], many researchers have devoted themselves to studying particle behavior at the solidification frontier. Moreover, a variety of models have been developed to explain the transition between particle absorption and frontier pushing, and the dominant factors affecting particle behavior have been identified, thereby aiming to control particle behavior and distribution.…”