Thermal shock behaviour of α:β-SiAlON–TiN composites

The effect of z value on intergranular phase crystallization of αı/βı-SiAlON-TiN composites

“…Therefore TiN is a very good candidate to impart these properties to SiAlON matrix. In our previous studies, the effect of TiN (average particle size of 1-2 m) addition on the densification, phase assemblage, microstructural evolution, z value and thermal shock resistance of ␣ ı /␤ ı -SiAlON compositions were investigated [16,17]. It was determined that TiN addition did not have any adverse effect on densification, phase assemblage, z value and mechanical properties.…”

β-SiAlON-TiN/TiB2-BN composites by infiltration-mediated SHS under high pressure of nitrogen gas

“…Service parameters of sialon ceramics can be markedly improved by addition of other refractory compounds with strongly different physical parameters, such as Young modulus, thermal/electrical conductivity, thermal expansion, etc. The addition of hexagonal boron nitride (h-BN) was found to improve thermal shock and tribological behavior of material, as well as its machinability [4][5][6][7], while the addition of TiN and TiB 2 improved tribological parameters, thermal conductivity, fracture toughness, and thermal shock resistance [8]. The ceramic composites containing TiN and TiB 2 seem promising for fabrication of heaters, igniters, and vaporizers [9].…”

Effects of FeMo alloy on nitridation and mechanical properties of reaction bonded β-Sialon/FeMo ceramic composites

“…The chemical formula of b-Sialon is Si 6ÀZ Al Z O Z N 8ÀZ (Z = 0-4.2) and its hexagonal crystalline structure is derived from b-Si 3 N 4 [1]. Sialon ceramics have a combination of several excellent properties of both b-Si 3 N 4 and Al 2 O 3 [2][3][4], and are promising materials for high temperature, high corrosive environments and high mechanical stress applications due to their high thermal shock resistance, high strength retention at elevated temperature, good erosion resistance and creep resistance. The traditional method to synthesize Sialon ceramics is to sinter a mixture of Si 3 N 4 , AlN and Al 2 O 3 at temperatures higher than 1600°C in a nitrogen atmosphere for several hours [5][6][7][8].…”