J. Mater. Sci. Technol. ›› 2025, Vol. 219: 173-188.DOI: 10.1016/j.jmst.2024.07.048

• Research article • Previous Articles     Next Articles

Enhanced strength and toughness in boron nitride nanosheets/Ti composites through in-situ interfacial nano-TiBw manipulation

Ni Xionga,b,c, Hongmei Zhanga,b,c,*, Xingwang Chenga,b,c, Xiaonan Mua,b,c,*, Ke Fenga,b,c, Hongqiang Duana,b,c, Yu Wanga,b,c   

  1. aSchool of Materials Science, Engineering, Beijing Institute of Technology, Beijing 100081, China
    bNational Key Laboratory of Science, Technology on Materials Under Shock, Impact, Beijing 100081, China
    cTangshan Key Laboratory of Science, Technology, Tangshan 063000 China
  • Received:2024-01-24 Revised:2024-07-08 Accepted:2024-07-12 Published:2024-09-13 Online:2025-06-05
  • Contact: *E-mail addresses:zhanghm@bit.edu.cn (H. Zhang),muxn@bit.edu.cn (X. Mu)

Abstract: Achieving intrinsic strengthening of boron nitride nanosheets (BNNSs) in Ti matrix composites was still an unsettled issue due to its severe and uncontrollable interface reaction. In the present study, high-performance BNNSs/Ti composites were fabricated by using the warm compaction (WC) technique and rapid heat treatment (HT) strategy on the basis of interfacial nano-TiBw design. The intrinsic structure of BNNSs was well-retained and nano-TiBw on partially reacted BNNSs led to a brilliant interface bonding and BNNSs intrinsic strengthening. Tensile tests revealed that 0.1 wt.%BNNSs/Ti composites exhibited the tensile strength (UTS) of 876 MPa (61 % higher than pure Ti) and the fracture elongation of 22.6 %, demonstrating the well-balanced property. By employing the in-situ TEM experiment, we solve an existing debate, uncovering the synergistic toughening effect from BNNSs and interfacial nano-TiBw which effectively inhibited the micro-cracks propagation on BNNSs and heterogeneous interface. This work paves a new way for developing high-performance BNNSs/Ti composites by reaction interface manipulation and underscores the importance of maintaining BNNSs intrinsic structure in the Ti matrix.

Key words: Ti matrix composites, BNNSs, Interface design, Mechanical property