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Ceramics international v.43 no.6, 2017년, pp.4814 - 4820   SCI SCIE SCOPUS
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Microstructural evolution, mechanical and thermal properties of LaB6 embedded in Si-B-C-N prepared by spark plasma sintering

Liang, Bin (Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China ) ; Yang, Zhihua (State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China ) ; Miao, Yang (Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China ) ; Li, Quan (Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China ) ; Zhu, Qishuai (Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China ) ; Liao, Xingqi (Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China ) ; Jia, Dechang (State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China ) ; Zhou, Yu (Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin ) ;
  • 초록  

    Abstract Si-B-C-N monoliths with 5wt% LaB 6 additives were prepared by spark plasma sintering at 1250–2000°C and 50MPa using a mechanically alloyed mixture of graphite, c-Si, h-BN and LaB 6 powders as the starting materials. Microstructural evolution, mechanical and thermal properties of the as-prepared La/Si-B-C-N monoliths were investigated. The densification of the ceramics starts at 1160° and ends at 1800°C with the formation of La-containing compounds coupled with SiC and BN(C) phases. La-containing BN(C) grains develop into a lamellar structure at 1900°C offering improved fracture toughness and decreased Vickers hardness, flexural strength and elastic modulus. The formation of lamellar BN(C) is also responsible for a high thermal expansion coefficient of 4.2×10 −6 /°C.


  • 주제어

    A.   Sintering .   B.   Microstructure .   C.   Mechanical properties .   C.   Thermal expansion.  

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