Influence of nano-aluminum filler on the microstructure of SiOC ceramics

Effect of starting particle size and barium addition on flexural strength of polysiloxane-derived SiOC ceramics

“…Second, the incorporation of Ba into the SiOC glass provides heterogeneous nucleation sites for crystallization of ¢-cristobalite and ¢-SiC and enhances the crystallization, compared to the SiOC specimen. Toma et al 29) observed segregation of SiC at extremely low temperatures (800°C) and crystallization of mullite at unusually low temperatures (about 1300°C) when nano-aluminum was added into SiOC ceramics. These results also support the above suggestion.…”

Structure properties relationship in silicon oxycarbide glasses obtained by spark plasma sintering

“…Several strategies have been carried out to obtain dense ceramic materials such as the incorporation of fillers [3], modification of the crosslinking conditions [4] or hot pressing techniques [5,6]. The addition of active or passive fillers are, by far, the easiest and most recurring approach to obtain pore-free ceramics but still, in many of the cases, the procedure requires high temperature and long annealing times with the subsequent risk of partial crystallization of the contained phases [2,7]. This strategy involves the obtaining of ceramic-matrix composites or nanocomposites.…”

“…Sglavo et al [8] obtained ceramic laminates of alumina/silicon carbide with an excellent adhesion and higher strength values than SiAlON ceramics obtained from preceramic polymers [12]. Toma et al [7] took the advantage of the reactions involved in the reactive pyrolysis to obtain piezoresistive SiOC-based ceramics reinforced with active aluminum fillers [13].…”

“…SiC and SiO 2 . We also used a filler with a completely different nature, Al 2 O 3 that is known to react with the silica to form a mullite phase [7,13]. The use of a carbon source, that is a secondary phase contained in the silicon oxycarbides, was avoided because of the many forms of carbon (i.e.…”

Joining of alumina by using polymer blend method

“…15), 16) As shown these reports, the direct reaction between silicon oxide (or silicon oxycarbide) and Al are effectively accelerated in the cases of polymer precursor method. 17) In the joining process using PCS and Al foil, high temperature oxidation process of SiC layer on alumina is necessary.…”