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Formation of high-density TiN/Ti5Si3 ceramic composites using preceramic polymer

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Abstract

The formation, microstructure and properties of high-density TiN/Ti5Si3 ceramic composites created by the pyrolysis of preceramic polymer with filler were investigated. Methylpolysiloxane was mixed with TiH2 as filler and ceramic composites prepared by pyrolysis at 1200°C to 1600°C under N2, Ar and vacuum were studied. When a specimen with 70 vol.% TiH2 was pyrolyzed up to 1600°C in a vacuum after a preheat treatment at 850°C in a N2 atmosphere and subsequently heat-treated at 1600°C for 1 h under Ar at a pressure of 2 MPa, a ceramic composite with full density was obtained. The microstructure of the ceramic composite was composed of TiN and Ti5Si3 phases. Under specific pyrolysis conditions, a ceramic composite with a density of 99.2 TD%, a Vickers hardness of 18 GPa, a fracture toughness of 3.5 MPam1/2, a flexural strength of 270 MPa and a electrical conductivity of 6200 ohm−1·cm−1 was obtained.

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Authors and Affiliations

  1. School of Advanced Materials Science Engineering, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440-746, Korea

    Beom Seob Kim, Sung Jin Hong & Deug Joong Kim

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  1. Beom Seob Kim
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  2. Sung Jin Hong
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  3. Deug Joong Kim
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Correspondence to Deug Joong Kim.

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Kim, B.S., Hong, S.J. & Kim, D.J. Formation of high-density TiN/Ti5Si3 ceramic composites using preceramic polymer. Met. Mater. Int. 16, 565–568 (2010). https://doi.org/10.1007/s12540-010-0807-z

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  • DOI: https://doi.org/10.1007/s12540-010-0807-z

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