Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (6): 683-690.DOI: 10.15541/jim20210652

• RESEARCH LETTER • Previous Articles     Next Articles

Microstructure and Mechanical Properties of SiC Joint Brazed by Al-Ti Alloys as Filler Metal

XU Puhao(), ZHANG Xiangzhao, LIU Guiwu(), ZHANG Mingfen, GUI Xinyi, QIAO Guanjun()   

  1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
  • Received:2021-10-22 Revised:2022-01-19 Published:2022-06-20 Online:2022-01-24
  • Contact: LIU Guiwu, professor. E-mail:;
    QIAO Guanjun, professor. E-mail:
  • About author:XU Puhao (1993–), male, PhD candidate. E-mail:
  • Supported by:
    National Natural Science Foundation of China(52002153);National Natural Science Foundation of China(51572112);Natural Science Foundation of the Jiangsu Higher Education


SiC ceramic has excellent overall properties, and joining it to other materials with high joint strength is an important issue in the actual applications. Brazing of SiC ceramic to itself was performed using the as-fabricated Al-(10, 20, 30, 40)Ti alloys with nominal Ti concentrations of 10%, 20%, 30%, and 40% at 1550 ℃ × 30 min. The average joint shear strength fluctuates in the range of ~100‒260 MPa with the interlayer thickness of ~50 μm. Moreover, the average strength SiC/Al-20Ti/SiC joint is increased markedly with the interlayer thickness decreasing from ~100 to 25 μm, reaching the maximum of ~315 MPa. Meanwhile, the (Al) phase in the interlayers is reduced gradually till disappear with the thinnest brazing interlayer, leaving the Al4C3, TiC and (Al,Si)3Ti phases in the interlayer. The joint fractures of SiC/Al-20Ti/SiC joint mainly occur in the SiC ceramic substrate near the interlayer/ceramic interface.

Key words: SiC, brazing, interfaces, microstructures, mechanical property

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