Journal of Inorganic Materials ›› 2015, Vol. 30 ›› Issue (6): 667-672.DOI: 10.15541/jim20140688

• Orginal Article • Previous Articles    

Microstructure and Property of TiB2 Reinforced Reaction-bonded B4C Composites

LIN Qing-Qing1,2,3, DONG Shao-Ming1,2, HE Ping1,2, ZHOU Hai-Jun1,2, HU Jian-Bao1,2   

  1. (1. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2014-12-31 Published:2015-02-16 Online:2015-05-22
  • About author:LIN Qing-Qing(1987– ), female, candidate of master degree. E-mail: linqingqing_2006@126.com
  • Supported by:
    Innovation Project of Shanghai Institute of Ceramics (Y22ZC6160G);National High Technology Research and Development Program (2013AA030703)

Abstract:

Dense B4C composites were fabricated by reaction bonding technique based on vacuum infiltration of silicon melt into green preforms made of microporous carbon, B4C and Ti powders. Phase assemblage and microstructure of the composites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrum (EDS) and transmission electron microscope (TEM). The flexural strength and fracture toughness of the composite with 15wt% Ti in its preform were 313 MPa and 5.40 MPa•m1/2, respectively. The in-situ generated TiB2 played a positive role in strengthening and toughening material.

Key words: reaction bonded boron carbide, microporous carbon, Ti, TiB2, toughening and strengthening

CLC Number: