Pressureless sintering of β-SiAlON ceramic compositions using fluorine and oxide additive system

Enhanced thermal conductivity and mechanical properties of a GNP reinforced Si3N4 composite

“…30 Previous investigations showed that the uoride doped Si 3 N 4 ceramics can facilitate the transformation of ato b-Si 3 N 4 more strongly than that of oxygen containing additives. 31,32 The Raman spectroscopy can denitely determine the carbon phase in the composites. 33 Generally, the G band signies the stretching vibration of the graphitic lattice plane while the D band represents graphitic lattice defects and the change of structure disorder.…”

THE SHRINKAGE, PHASE COMPOSITION AND MECHANICAL PROPERTIES OF CERAMICS WITH DIFFERENT β-SiAlON MAIN CRYSTALLINE PHASES PREPARED BY STEREOLITHOGRAPHY

“…In fact, without the whisker microstructure, a high toughness and high strength would be very difficult to achieve in the SiAlON-based ceramic materials [32]. In general, the densification of β-SiAlON can be accelerated by more liquid phases and a lower viscosity [33][34][35][36][37]. A higher Z value (if you add more Al 2 O 3 and AlN) would induce more liquid phases during the sintering.…”

Recycling of coal ash for production of dense β‐Sialon/ZrN/ZrON‐based ceramics without sintering aids via pressureless sintering

“…Oxidation resistance, Pressureless sintering, Sialon, Sintering properties, ZrN, ZrON Some methods such as pressureless sintering, 9,10 reaction sintering, 1 hot-pressing sintering, 11 microwave sintering, 12 hot isostatic pressing sintering, 13 gas pressure sintering, 14 and spark plasma sintering 15 have been adopted to prepare β-Sialon-based ceramics. Reddy et al 9 fabricated the β-Sialon porous ceramics at 1700°C for 4 hours via pressureless sintering process under nitrogen atmosphere choosing α-Si 3 N 4 , Al 2 O 3 , AlN, and Y 2 O 3 as raw materials, and corn starch as additive.…”

“…Reddy et al 9 fabricated the β-Sialon porous ceramics at 1700°C for 4 hours via pressureless sintering process under nitrogen atmosphere choosing α-Si 3 N 4 , Al 2 O 3 , AlN, and Y 2 O 3 as raw materials, and corn starch as additive. Çalışkan et al 10 Coal ash emerges as a by-product from the combustion of raw coal in thermal power plant. Until 2020, the present accumulating amount of fly ash in China is approximately three billion tons.…”

“…and ZrO 2 often need to be added. 3,10,23,24 In the present work, pressureless sintering process has been adopted to fabricate dense β-Sialon/ZrN/ZrON composite ceramics (SZZCCS)-based composite ceramics without any additive. The β-Sialon/ ZrN composite powders which being synthesized from coal ash, zircon, and active carbon have been chosen as the raw materials.…”