Characterization of Si3N4－TiN Composites Prepared by Spark Plasma Sintering
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概要
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Spark plasma sintering (SPS) was applied to produce electroconductive Si3N4-20 vol%TiN composites. The sintering mechanism for SPS was a hybrid of dissolution-reprecipitation and viscous flow at 1450 and 1500 ℃ and viscous flow at 1600 ℃. At temperatures higher than 1550 ℃, nearly full density (relative density of 98%) was achieved. The Vickers micro-hardness reached a maximum (21.7 GPa) at 1550 ℃. Homogeneous distribution without the agglomeration of TiN particles in the Si3N4matrix was achieved by SPS at 1600 ℃. The composites prepared by SPS at 1550 and 1600 ℃ had low electrical resistivity and could be machined by electrical discharge machining.
- 一般社団法人 日本MRSの論文
一般社団法人 日本MRS | 論文
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