Microstructures and mechanical properties of TiN-TiB2-Ti5Si3 composites in-situ fabricated by spark plasma sintering

Jianfeng ZHANG; Leifeng LIU; Lianjun WANG; Wan JIANG; Lidong CHEN; Rong TU; Takashi GOTO

doi:10.2109/jcersj2.117.1085

Papers

Microstructures and mechanical properties of TiN-TiB₂-Ti₅Si₃ composites in-situ fabricated by spark plasma sintering

Jianfeng ZHANG, Leifeng LIU, Lianjun WANG, Wan JIANG, Lidong CHEN, Rong TU, Takashi GOTO

Author information

Jianfeng ZHANG
State key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
Institute for Materials Research, Tohoku University
Leifeng LIU
State key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
Lianjun WANG
State key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
Wan JIANG
State key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
Lidong CHEN
State key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
Rong TU
Institute for Materials Research, Tohoku University
Takashi GOTO
Institute for Materials Research, Tohoku University

Keywords: TiN-TiB₂-Ti₅Si₃, Ceramic-matrix composites (CMCs), Intermetallics, Mechanical properties, Spark plasma sintering

JOURNAL FREE ACCESS

2009 Volume 117 Issue 1370 Pages 1085-1088

DOI https://doi.org/10.2109/jcersj2.117.1085

Details

Abstract

Various TiN-TiB₂-Ti₅Si₃ composites have been synthesized via spark plasma sintering of Ti, BN and Si₃N₄. The reaction process anlaysis indicates that Ti₅Si₃ forms earlier than TiB₂. The reaction heat as well as the Joule heat may prompt the melting of Ti₅Si₃, making it infiltrate into TiN and TiB₂. Thus, the composites can be further densified with the in-situ addition of Ti₅Si₃. For TiN-TiB₂-Ti₅Si₃ composites, the maximum fracture toughness was 4.5 ± 0.3 MPa·m^1/2, and maximum flexural strength was 601.1 ± 28.5 MPa, which were both quite higher than those of TiN-TiB₂ composites. The related toughening and strengthening mechanisms were proposed from microstructural analysis.

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