Laser synthesis of silicon carbonitride nanopowders; structure and thermal stability

The effect of the wet-milling process on sintering temperature and the amount of additive of SiAlON ceramics

“…The density of the starting mixture (d) was calculated as 2.95 g/cm 3 . The crystalline phases of the powders and the sintered samples were identified using an X-ray diffractometer (Rigaku Rint 2000, Tokyo, Japan) with Cu Ka radiation (l = 1.540 Å ) from 58 to 608 with a scanning speed of 28/min.…”

“…Additionally, the particle size of starting powders and the sintering temperature play an essential role on both the sintering behavior and the cost of processing. So, many investigations have been focused on the preparation of nano-sized SiAlON powders to decrease the sintering temperature and increase the mechanical properties [2][3][4].…”

“…There are certain methods for the preparation of nano-sized SiAlON powders such as plasma-chemical [2] and laser synthesis [3], sol-gel [4] and, as a top-to-bottom process, high-energy mechanical milling [5]. Zalite and co-workers [2] obtained fully dense ceramics from plasma-chemical synthesized SiAlON nano powders at relatively low temperatures (1500-1600 8C) with good mechanical properties.…”

Synthesis of nanosized zirconium carbide by laser pyrolysis route

“…Laser pyrolysis technique is based on the interaction between a laser beam and a gaseous or liquid precursor [18]. The heat energy is transferred by resonance between the emission line of the laser and one of the absorption bands of the precur- For ZrC synthesis, the liquid phase zirconium butoxide Zr(OC4H9)4 (ZrBu) diluted in 20 vol% butanol was supplied by Sigma-Aldrich and used without further purification.…”

Two synthesis routes of organometallic precursors for the elaboration of SiCNYO pre‐alloyed nanopowders

“…More particularly, silicon carbonitride (SiCN) nano-sized powders could appear as candidates for elaborate dense nanostructured Si 3 N 4 /SiC composites showing ductile behavior at high temperature. [8] To avoid the mixing process and to obtain Si 3 N 4 /SiC nanocomposites, [9] several studies have been devoted to the synthesis of organometallic precursors. [3,10,11,3] The solubility and viscosity of the polymer precursors make the preparation of powders, ceramic coatings, composites and fibers possible.…”