J. Mater. Sci. Technol. ›› 2026, Vol. 243: 192-205.DOI: 10.1016/j.jmst.2025.03.091

• Research article • Previous Articles     Next Articles

Achieving nearly-homogeneous joint of ZrC-SiC composite via liquid-film assisted transformation strategy enabled by pulsed current

Jincheng Lina, Yao Chena, Decai Maa, Lili Xinga, Peng Heb, Weiqi Yanga,*, Tiesong Linb,*   

  1. aSino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China;
    bState Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin 150001, China
  • Received:2024-12-18 Revised:2025-03-09 Accepted:2025-03-17 Published:2026-02-01 Online:2025-05-23
  • Contact: *E-mail addresses: yangweiqi@mail.sysu.edu.cn (W. Yang), hitjoining@hit.edu.cn (T. Lin).

Abstract: Developing a high-performance joint of ZrC-SiC composite is urgent in the manufacturing of advanced thermal protection systems. In this work, a nearly-homogeneous joint of ZrC-SiC was achieved by a liquid-film assisted strategy enabled by pulsed current. A sandwich Ti-Zr-Ti interlayer was in-situ transformed to a dense ceramic seam of ZrCx at 1400 °C for 20 min, and the obtained joint exhibited a shear strength and reliability comparable to those of the base material. The experimental and theoretical analysis revealed that the joint formation mechanism involved (i) Precipitation of primary ZrCx particles in Zr core-interlayer, (ii) Homogenization of Ti and Zr foils, (iii) Ti3Zr3Si3 interfacial layer produced by interaction of SiC and (Zr, Ti), (iv) Liquid-film formation by eutectic reaction of Ti3Zr3Si3 and (Zr, Ti), and (v) Epitaxial growth of ZrCx particles accompanied by liquid extrusion. The pulsed-current triggered interfacial overheating, enhancing the interfacial reactions and facilitating the liquid extrusion. Overall, our work provides a strategy for the development of high-performance components of ZrC-SiC composite via a facile joining process.

Key words: ZrC-SiC composite, Pulsed current, Interfacial reaction, Joint, Homogeneous interface