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- W2322222012 abstract "β-sialon (z=1)-SiC (50mass%) composite was fabricated by hot-pressing a spray-dried mixture of α-Si3N4, SiC and aluminum-iso-propoxide solution. The bending strength and fracture toughness (KIC) of sinterd bodies were investigated by comparing with β-sialon (z=1) without SiC. Both strength and KIC were increased from 1000 to 1560MPa and 3.5 to 4.5MPa·m1/2 by SiC addition, respectively. About a half of tested specimens fractured from internal defects and the other fractured from surface flaws. The strength of the specimens which fractured from internal defects increased from 1180 to 1580MPa. This value coincided with that derived from the equation KIC=σfY√c, due to the same size of defects as fracture origins (c). In case of the specimens which fractured from surface flaws, the strength increased from 900 to 1540MPa. The increase in KIC presumably resulted in decreasing the size of machining flaws as fracture origins. It was considered that as the transgranular fracture occurred in the β-sialon matrix of this composite, homogeneously dispersed SiC particles immediately brought small crack deflection. This might be a reason for increase in both strength and KIC." @default.
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- W2322222012 date "1996-01-01" @default.
- W2322222012 modified "2023-10-18" @default.
- W2322222012 title "Room-Temperature Strength and Fracture Toughness of β-Sialon (<i>z</i>=1)-SiC Composite Fabricated from Aluminum-<i>iso</i>-Propoxide, α-Si<sub>3</sub>N<sub>4</sub> and β-SiC" @default.
- W2322222012 doi "https://doi.org/10.2109/jcersj.104.770" @default.
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