Evaluation of High Temperature Interfacial Bonding Strength of Ti₃SiC₂-Al₂O₃ Joint in Air

Abstract:

Ti₃SiC₂-Al₂O₃ joint with strong interface has potential high temperature applications because it combines with the merits of hard ceramics and soft ceramics. The safety is strongly dependent on the interfacial bonding strength between Ti₃SiC₂ and Al₂O₃. In this work, the cross-section method was suggested to evaluate the tensile and shear bonding strength for Ti₃SiC₂-Al₂O₃ joint from room temperature to 800 °C in air. A novel testing fixture made of SiC was designed and machined to avoid the bending stress at the bonding surface during the testing process. It is indicated that the measured shear bonding strength is usually higher than tensile bonding strength for Ti₃SiC₂-Al₂O₃ joint. Both the tensile and shear bonding strength are decreased with the increment of testing temperatures. At 800 °C, the tensile and shear bonding strength are declined to be about 43.15% and 45.02% compared with those at room temperature, relatively. The mechanism for the strong interface between Ti₃SiC₂ and Al₂O₃ is also discussed.

• Periodical: Key Engineering Materials (Volume 544)
• Pages: 321-325
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.544.321
• Online since: March 2013
• Authors: De Tian Wan, Yi Wang Bao, Xiao Gen Liu, Yuan Tian, Run Run Li
• Keywords: Cross Section Method, High Temperature Bonding Strength, Testing Fixture, Ti₃SiC₂-Al₂O₃ Joint

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