Materials based on nanosized β-Si3N4 composite powders

Effect of Heating Rate on Spark Plasma Sintering of a Nanosized β-Si3N4-Based Powder

“…Similar characteristics are also generally consistent with observations of equiaxial grains sintered with a slower heating rate in SPS 19 and hot-pressed nanosized b-Si 3 N 4 samples at 16001 and 17001C. 33 The features of the rapidly heated specimens (2001C/min) at different sintering temperatures for 3 min are shown in the SEM images of the plasma-etched polished surface with the same magnification ( Figs. 7(a)-(c)).…”

“…Figures 5(a) and (b) show the typical SEM micrographs of specimens S1600 and M1600 sintered at 16001C for 5 min with a heating rate of 50 and 1001C/min, respectively, which indicates that the uniform and ultrafine grains with a low aspect ratio can be observed in the cases of slower heating rate. 33 The features of the rapidly heated specimens (2001C/min) at different sintering temperatures for 3 min are shown in the SEM images of the plasma-etched polished surface with the same magnification (Figs. From the bright-field/TEM (BF/TEM) image of specimen M1600 (Fig.…”

Fabrication of Heat-Resistant and Plastic-Formable Silicon Nitride

“…The β-sialon grains precipitate from the liquid phase during the densification of BP2 with a very high driving force, which leads to isotropic grain growth [20]. The β-sialon grains precipitate from the liquid phase during the densification of BP2 with a very high driving force, which leads to isotropic grain growth [20].…”

Nano Si3N4 composites with improved tribological properties

“…The main reason for this behaviour is the different density of ß nuclei 16 in the starting powders. The metastable α-Si 3 N 4 modifi cation transformed to the stable ß-Si 3 N 4 modifi cation during sintering.…”