Combined bulk and surface analysis of oxygen species in Si3N4 powders by means of carrier-gas heat-extraction methods and Auger electron spectrometry

Cfiber/SiCfiller/Si–B–C–Nmatrix composites with extremely high thermal stability

“…After the infiltration of the slurry, the mold was heated at 80°C for 24 h. The dried specimens were subsequently de-molded and heated to 1700°C for 2 h in Ar to remove surface SiO 2 from the filler. The oxygen content of the heat-treated SiC was analyzed by hot gas extraction using a TC436DR (Leco) [28].…”

Systematic Approach for Dispersion of Silicon Nitride Powder in Organic Media: I, Surface Chemistry of the Powder

“…13 The amount of oxygen that is bound in surface oxides (SiO x ) and in the core was analyzed further using modified CGHE. Figure 1 shows a CGHE evologramme of the as-received powder.…”

Pre‐Treatment of Si3N4 Filler Particles for the Improvement of Si3N4filler/Si–C–Nmatrix Particulate‐Reinforced Composites

“…The oxygen content decreased after the treatment at 1300°C, which behavior became more distinct in the 1750‐sample. However, some oxygen remained even after the treatment at 1750°C, indicating the presence of oxygen inside the powder 10 . The bulk density of the pellets decreased with increasing heat‐treatment temperature due to the enhancement of the decomposition reactions described above.…”

“…However, some oxygen remained even after the treatment at 17501C, indicating the presence of oxygen inside the powder. 10 The bulk density of the pellets decreased with increasing heat-treatment temperature due to the enhancement of the decomposition reactions described above. The carbon content in the pellets increased when the protective Si 3 N 4 powder bed was not applied during the heat treatment in N 2 , indicating the formation of SiC and the deposition of graphite.…”